BatracMans of the Province Rio Grande do 8ul. 425 



Hydromedusa, Wagl. 



Hydromedusa tectifera. 



Hydromedusa Maximiliani (non Mik.), Wagl. Syst. Ampli. p, 135, 



pi. iii. figs. 25-42 ; Burmeister, An. Soc. Sc. Argent, xxi. 1886, 



p. 5. 

 Chelodina Maximihani, Duni. & Bibr. I. c. p. 449 ; Hens, /. c. p. 355. 

 Hydromedusa tectifera, Cope, Proc. Am. Phil. Soc xi. 1869, p. 147 ; 



Bouleng. Ann. & Mag. Nat. Hist. (5) xvi. 1885, p. 85. 

 Hydromedusa platanensis, Gray, Ann. & Mag. Nat. Hist. (4) xi. 1873, 



p. 302; Giinth. Ann. & Mag. Nat. Hist. (5) xiv. 1884, p. 423, 



pi. xiv. 

 Hydromedusa Wagleri^ Giinth. /. c. 



B. M. ; V. I. 



Chelonidse. 

 Thalassochelys, Fitz. 



Thalassochelys caretta. 



Testudo caretta, Linn. S. N. i. p. 351, 

 Testudo caoua»a, Daud. Rept. ii. p. 54. 

 Chelonia caomma, Dum. & Bibr. ii. p. 552, 

 Thalassochelys caretta, Bonap. Auiph. Eur. p. 24. 



B. M. ; V. I. 



Crocodilia. 

 Alligator, Cuv. 



Alligator latirostris. 



Crocodilus yacare, Daud, Rept. ii. p. 407. 

 Crocodilus latirostris, Daud. I. c. p. 417. 

 Alligator cynocephalus, Dum. & Bibr. iii. p. 86. 

 f Alligator latirostris, Hens. I. c. p. 348. 



B. M.; V. I. 



L A C E R T I L I A. 



Iguanidae. 



A. A transverse gular fold. 



a. A slight dorsal crest or denticulation ; dorsal scales uni- 



form Enyalius. 



b. No crest ; dorsal lepidosis heterogeneous Anisolepis. 



c. No crest ; dorsal scales uniform, granular Urostrophus. 



B. No gular fold, 



a. Ventral scales smooth ; male with anal pores Liolcemus. 



b. Ventral scales keeled ; no anal pores Saccodeira. 



