78 ADDITIONS AND CORRECTIONS. 



Bell. Humboldt gives an interesting account of their habits, 

 but his descriptions are not sufficiently detailed, as he himself 

 justly observes, to distinguish the species. The first may be 

 H. expavsa, and the second is perhaps H. planiceps. 



Page 44. Trionyx. — Dr. Wagler keeps the generic name 

 of Trionijx for my Emyda, and uses that of Aspidonectes 

 for my Trionyx. 



Page 49, after f. add — g. Trionyx ManteUi, Mantel, 

 Tilgate, t. 6, f. 7, and Geo!. Trans, series 2, iii. t. 16. 



Page 51. Sphargis. — Dr. Wagler has used the name 

 Dermatochelys for this genus. 



Page .54. — d. Chelonia Harvicensis. Woodward Syn. Org. 

 Rem. t. front — Mus. Norwich, Harwich. 



e. Chelonia anliqua. Koenig. Icon. Sect. ii. f. 232. 



Page 56, 62. Gavialis, Crocodilus, and Alligator. — Dr. 

 Wagler has given to the Gavials the name of Rhamphostoma, 

 he has retained the name of Crocodihis for the Crocodiles, 

 and given that of Champsa for the Alligators. 



Page 58. Crocodilus Vulgaris. — In the Francfort Museum 

 there is a specimen of Crocodile brought from Africa, by 

 Dr. Ruppell, which he thinks is distinct, and has named it 

 Croc, octophractus. The beak is rather narrower than the 

 common Egyptian specimens, it being I82- inches long, and 

 at the notch of the canines 3-i-, at the eyes 7, and at the 

 occiput 1 inches wide, while in the Egyptian specimen of 

 nearly the same size, the head was ly inch longer, the same 

 width at the notch, and 1 inch wider at the eyes and at the 

 occiput. The former has 4 nuchal and 8 cervical plates, 

 while the latter has 6 nuchal and 6 cervical plates ; it may 

 prove to be only a variety, but the subject deserves exami- 

 nation. 



Page 64. Enaliosauri. — Dr. Wagler has recently united 

 these animals with the Echidna CTachyglossus), the Platypus 

 (OrnithorhynchiisJ, and the Onuthocephalus, into a class, 

 under the name of Gryphi, which he places between Mam- 

 malia and Birds ! 



Page 64. Ichthyosaurus. — Dr. Wagler has changed the 

 name of this genus to Gryphus. 



Page G^. Plesiosaiirus. — Dr. Wagler has given to this 

 genus the name of Halidracon. 



