Crocodiles. 



Pterodac- 

 tyles. 

 Wall-case, 

 No. 1. 



Table-case, 

 No. 1. 



Pteranodoii, liad 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 i 

 — but their remains are all | 

 very fragmentary. For exam- | 

 pie, some detached vertebrce of g s, 

 che neck of one species have n |: 

 been foimd in the Cambridge g J 

 Greensand, measuring 2 in- S |- 

 ches in length, and portions 'jf. | 

 of humeri 3 inches broad. ±t 

 Sach bones give evidence of ^ | 

 a flying lizard having pro- f | 

 babiy an expanse of wings 3 3 

 of from 18 to 20 feet. The -~ | 

 Pterodactyles of the Chalk |i^ 

 of Kent were nearly, if not -T 

 quite, as large. ^ > g^ 



The smallest species of |-^ 

 Pterodactyle fromSolenhofen ^-'g 

 was not larger than a sparroAV ^ 

 (see Table-case ISTo.l). These | 

 singular flying reptiles do not -^ 

 appear to have lived longer | 

 than the period of time repre- r 

 sented by the deposition of 

 the strata from the Lias 

 formation to the Chalk, their 

 remains being confined to 

 rocks of the Secondar}^, or 

 Mesozoic age. They are now 

 entirelv extinct. 



Crocodiles. 



Wall-case, 

 No. 2, and 

 Table-casea, 

 ^7os. 9 to 13. 



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. 9-1.3) have 

 the body covered with a thick layer of oblong bony plates or 

 scutes, pitted on the surface, and covered with a horny substance. 

 They have a single row of pointed and subcorneal or laterally 



