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Chapters: Belemnoidea, Actinocerida, Endocerid, Boletzkyida, Trachyteuthis, Lambeoceras, Proterocameroceratidae, Clarkoceras, Tusoteuthis, Allotrioceras, Ormoceras, Ostenoteuthidae, Najaceras, Plectronoceras, Vampyronassa Rhodanica, Belemnotheutis, Rhomboteuthis Lehmani, Trocholites, Nanno, Belemnitella, Mcqueenoceras, Hibolithes, Plesioteuthididae, Cylindroteuthis, Pachyteuthis, Niobrarateuthis, Megateuthis Gigantea, Acroteuthis, Aulacocerida, Kinoceras, Neohibolithes. Source: Wikipedia. Pages: 81. Not illustrated. Free updates online. Purchase includes a free trial membership in the publisher's book club where you can select from more than a million books without charge. Excerpt: AulacoceridaPhragmoteuthidaBelemnitidaDiplobelidaBelemnoteuthina Belemnites (or belemnoids) are an extinct group of marine cephalopod, very similar in many ways to the modern squid and closely related to the modern cuttlefish. Like them, the belemnites possessed an ink sac, but, unlike the squid, they possessed ten arms of roughly equal length, and no tentacles. The name "belemnoid" comes from the Greek word belmnon meaning "a dart or arrow" and the Greek word eidos meaning "form". Belemnites were numerous during the Jurassic and Cretaceous periods, and their fossils are abundant in Mesozoic marine rocks, often accompanying their cousins the ammonites. The belemnites become extinct at the end of the Cretaceous period along with the ammonites. The belemnites' origin lies within the bactritoid nautiloids, which date from the Devonian period; well-formed belemnite guards can be found in rocks dating from the Mississippian (or Early Carboniferous) onward through the Cretaceous. Other fossil cephalopods include baculites, nautiloids and goniatites. Belemnites possessed a central phragmocone made of aragonite and with negative buoyancy. To the rear of the creature was a heavy calcite guard whose main role appears to have been to counterbalance the front...More: http://booksllc.net/?id=860602 ... Read more

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Chapters: Prehistoric Cephalopods, Belemnoidea, Actinocerida, Endocerid, Boletzkyida, Trachyteuthis, Lambeoceras, Proterocameroceratidae, Clarkoceras, Tusoteuthis, Allotrioceras, Ormoceras, Pohlsepia Mazonensis, Ostenoteuthidae, Najaceras, Keuppia, Plectronoceras, Proteroctopus Ribeti, Vampyronassa Rhodanica, Belemnotheutis, Rhomboteuthis Lehmani, Trocholites, Styletoctopus, Nanno, Belemnitella, Mcqueenoceras, Hibolithes, Plesioteuthididae, Cylindroteuthis, Pachyteuthis, Niobrarateuthis, Megateuthis Gigantea, Acroteuthis, Aulacocerida, Kinoceras, Neohibolithes. Source: Wikipedia. Pages: 87. Not illustrated. Free updates online. Purchase includes a free trial membership in the publisher's book club where you can select from more than a million books without charge. Excerpt: AulacoceridaPhragmoteuthidaBelemnitidaDiplobelidaBelemnoteuthina Belemnites (or belemnoids) are an extinct group of marine cephalopod, very similar in many ways to the modern squid and closely related to the modern cuttlefish. Like them, the belemnites possessed an ink sac, but, unlike the squid, they possessed ten arms of roughly equal length, and no tentacles. The name "belemnoid" comes from the Greek word belmnon meaning "a dart or arrow" and the Greek word eidos meaning "form". Belemnites were numerous during the Jurassic and Cretaceous periods, and their fossils are abundant in Mesozoic marine rocks, often accompanying their cousins the ammonites. The belemnites become extinct at the end of the Cretaceous period along with the ammonites. The belemnites' origin lies within the bactritoid nautiloids, which date from the Devonian period; well-formed belemnite guards can be found in rocks dating from the Mississippian (or Early Carboniferous) onward through the Cretaceous. Other fossil cephalopods include baculites, nautiloids and goniatites. Belemnites possessed a central phragmocone made of aragonite and with negative buoyancy. To the rear of the creatu...More: http://booksllc.net/?id=860602 ... Read more

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Volume: 1882Publisher: Washington, Govt. print. off.Publication date: 1882Subjects: CephalopodaNotes: This is an OCR reprint. There may be numerous typos or missing text. There are no illustrations or indexes.When you buy the General Books edition of this book you get free trial access to Million-Books.com where you can select from more than a million books for free. You can also preview the book there. ... Read more

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Chapters: Black Hole, Superconductivity, Amber, Hierarchy, Cephalopod, Self, Psychopathy, Sarcoidosis, Migraine Surgery, Climate Change Feedback, Education in Pakistan, List of Proposed Geoengineering Projects, Sahara Pump Theory, Belemnoidea, Kents Cavern, Jebel Qafzeh Remains, Auction Algorithm, Amiskwia, Scenella, Rostroconchia, Cyclomedusa, Palaeoctopus Newboldi, Anabarella. Source: Wikipedia. Pages: 241. Not illustrated. Free updates online. Purchase includes a free trial membership in the publisher's book club where you can select from more than a million books without charge. Excerpt: According to the general theory of relativity, a black hole is a region of space from which nothing, including light, can escape. It is the result of the deformation of spacetime caused by a very compact mass. Around a black hole there is an undetectable surface which marks the point of no return, called an event horizon. It is called "black" because it absorbs all the light that hits it, reflecting nothing, just like a perfect black body in thermodynamics. Under the theory of quantum mechanics black holes possess a temperature and emit Hawking radiation. Despite its invisible interior, a black hole can be observed through its interaction with other matter. A black hole can be inferred by tracking the movement of a group of stars that orbit a region in space. Alternatively, when gas falls into a stellar black hole from a companion star, the gas spirals inward, heating to very high temperatures and emitting large amounts of radiation that can be detected from earthbound and Earth-orbiting telescopes. Astronomers have identified numerous stellar black hole candidates, and have also found evidence of supermassive black holes at the center of galaxies. After observing the motion of nearby stars for 16 years, in 2008 astronomers found compelling evidence that a supermassive black hole of more than 4 million solar masses is located near the Sagi...More: http://booksllc.net/?id=4650 ... Read more