Crocodiles. 



Pterodac- 

 tyles. 

 Wall-case, 

 No. 1. 



Table-case, 

 No. 1. 



Pteranodon, had no teeth in 

 its jaws, which were a yard 

 in length, sharp-edged and 

 pointed, and were probably 

 encased in a horny sheath 

 like the beak of a stork or 

 heron (see Fig. 4). 



The Flying Lizards of 

 the Chalk and Greensand 

 attained even a larger size 

 but their remains are all 

 very fragmentary. For exam- 

 ple, some detached vertebrae of 3 

 the neck of one species have li 

 been found in the Cambridge | 

 Greensand, measuring 2 in- & 

 clies in length, and portions '- 

 of humeri 3 inches broad. *. 

 Such bones give evidence of % 

 a flying lizard having pro- ** 

 bably an expanse of wings - 

 of from 18 to 20 feet. The * 

 Pterodactyles of the Chalk 

 of Kent were nearly, if not 

 quite, as large. 



The smallest species of | 

 PterodactylefromSolenhofen 't- 

 was not larger than a sparrow 

 (see Table-case No.l). These 

 singular flying reptiles do not 

 appear to have lived longer 

 than the period of time repre- 

 sented by the deposition of 

 the strata from the Lias 

 formation to the Chalk, their 

 remains being confined to 

 rocks of the Secondary, or 

 Mesozoic age. They are now 

 entirely extinct. 



Order II. CROCODILIA. (CROCODILES.) 



The CROCODILIA, except in one or two instances (which are 

 placed in Wall-case No. 2, and in Table-cases Nos. 9-13) have 

 Table-cases, thft ^^. covered witn a tni ck layer of oblong bony plates or 

 Nos. 9 to 13.' scutes, pitted on the surface, and covered with a horny substance. 

 They have a single row of pointed and subconical or laterally 



Crocodiles. 



Wall-case, 

 No. 2, and 



