454 



MESOZOIC TIME REPTILIAN AGE. 



(d.) Gephalopods. — Tetrabranchs. — Fig. 700, Ammonites Nodotiamm, from the 

 Lower Lias; figs. 701, 701 a, A. bisulcatus, from the Lower Lias; A. margarita- 

 tus, Middle Lias. Dibranchs. — Figs. 702, 703, different views of one of the forms 



Figs. 695-699. 



W 



Brachiopods and Conchifers. — Figs. 695, 696, Lepta?na Moorei (X7); 696 a, same, natural 

 size; 697, Spirifer Walcotti ; 698, Ctenoides (Plagiostorna) gigantea (X Vz> \ 699, Gryphsea 

 arcnata (X %)■ 



of a complete osselet of a Belemnite ; fig. 704, B. paxillosus, Middle Lias ; fig, 

 704 a, section of same near the extremity ; fig. 705, B. pistilliformis. — Also spe* 



Figs. 700, 701. 



Cephalopods— Fig. 700, Ammonites Nodotianus; 701, 701 a, A. bisulcatus. 



cies of the Calamary family, or TeutMds (having the osselet membranous), of the 

 genera Beloteuthis, Geoteuthis, etc. : the fossils are the osselet, ink-bag (fig. 706), 

 and horny claws or hooks from the arms. 



