JURASSIC PERIOD. 



455 



The last species of the genus Conularia occurs in the Lias. The beak-like 

 mandibles (jaws) of Cephalopods are sometimes found fossil, and go under the 

 name of Rhyncholites. 



Figs. 702-706. 



Cephalopods. — Fig. 702, View, reduced, of the complete osselet of a Belemnite, — side-view; 

 703, Dorsal view of same ; 704, a, B. paxillosus ; 705, B. pistilliformis ; 706, Ink-bag. 



3. Articulates. — (a.) Crustaceans. — Genera Eryon, Glyphea, etc., and Cir- 

 ripeds of the genus Pollicipes, here first found. (6.) Insects. — Coleopters, gen. 

 Elater, Melolontha, Berosus, etc. ; Neuropters, gen. Ephemera, Libellula, Ortho- 

 phlebia, etc.; Orthopters, gen. Grylhis, etc.; Hemipters, gen. Cicada, Cimicides, 

 etc. ; Dipters, gen. Asilus, etc. 



4. Vertebrates. — (a.) Fishes. — Fig. 707, JEchmodus (Tetragonolepis), a 

 restoration of the fish; fig. 707 a, scales. 



(6.) Reptiles. — All the Reptiles have biconcave vertebrae. Fig. 708, Ichthyo- 



