. The animal kingdom, arranged after its organization, forming a natural history of animals, and an introduction to comparative anatomy. Zoology. MOLLUSCA. 669 fossil remains of this order are very numerous, and are classed according to the structure of their chambered p t shells. Those which, like thi septa smoctli and simple, and the siphon either penetrating the centre of the chambers or running along the inner margin, are grouped Into the family NaiUUidcB, the principal genera of which are •--? e Nautilus, Clymenia, CampuUUt, lAtuitea, and I ceratii:.-•. Those, on the other hand, which hav
. The animal kingdom, arranged after its organization, forming a natural history of animals, and an introduction to comparative anatomy. Zoology. MOLLUSCA. 669 fossil remains of this order are very numerous, and are classed according to the structure of their chambered p t shells. Those which, like thi septa smoctli and simple, and the siphon either penetrating the centre of the chambers or running along the inner margin, are grouped Into the family NaiUUidcB, the principal genera of which are •--? e Nautilus, Clymenia, CampuUUt, lAtuitea, and I ceratii:.-•. Those, on the other hand, which havo the septa sinuous and with located margins, and in which the siphnncle runs along their outer margin (in some instances, however, near tlnir O centre) are grouped into the family AvmoutUdCB, of which the principa] g inera are Amu, Baculites, Ilamitci, SoajphiUs, ami Turrilitcs. The following tabular arrangement will bring this classification at once under the eye, I.—Order Bibranchiata. Tribe A.— Family 1. Testacea 9 Fio. 5.—Pearly NAUTILUS] with the shell laid open; I, tcntncula; e, fun- nel ; p, foot; m, portion of mantle ; <j, eye ; g, siphon. Tribe B.—Becapoda. Family 1. TeutMdCB, Calamaries Loligo Onychoteuthis Sepiola Argonauta Bellerophon ? Family 2. Nttda. Octopus Family 1. Cranchia Loligopsis Family 2. Sepvidas, Cuttle-fishes 5* pia Family 3. Spirulida; Spirula Family 4. Belemnitidce Belemnites Family 1. Nautttida Nautilus Clymenia Campulites Family 2. Baculites Hamites Scaphites Turrilin-s II.—Order Tetrabranciuata. Family 1. hituites , Orthoceratites Family 2. Ammonitidce Ammonites It maybe well to add, with reference to the family of Camerinet (the Foraminifera of B'Orbigny) with which Cuvier's description of this class terminates, that it is now universally rejected from the Cephalopoda, though its true place in the animal scale cannot be determined until more shall be known of the animals by which the shells are formed. No very importa
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectzoology, bookyear1854
