18 



m^. S (V. 154 ; C. ?) & 

 $ (V. 149, 150, 154 ; 

 C. ?, ?, 114). 



q-s. d (V. 147, 152, 161 ; 

 C. ?, 119, 123). 



t. $ (V. 152 ; C. 126). 



u-v. c? (V. 151, 153 ; 0. 



101, 125). 

 zv. cJ (V. 156 ; 0. 117). 

 a:, y. $ (V. 150, 148 ; 



C. ?, ?). 

 z. $ (V. 154; 0.?). 

 a. Hgr. (V. 154; 0.120). 

 /3. Skull. 



COLTJBETDiE. 



Teapa, Tabasco. 

 Atoyac, Guerrero. 



F. D. Godman, Esq. 



[P.]. 



F. D. Godman, Esq. 

 [P.]. 

 Omilteme, Guerrero. F. D. Godman, Esq. 



[P.]. 

 Sto. Domingo de Dr. A. C.BuUer [0.]. 



Guzman. 

 Belize. Dr. Giintlier [P.]. 



Honduras. 



Duenas, Guatemala. 0. Salvin, Esq. [C.]. 



Caracas. 



Vera Cruz. 



58. PHRYNONAX. 



Spilotes, part., Bum. ^ Bihr. Erp. G4n. vii. p. 218 (1854) ; Gunth. 



Cat. Col. Sn. p. 96 (1858) ; Jan, Ulenco sist. Ofid. p. 62 (1863) ; 



Bocourt, Miss. 8c. Mex., JRept. p. 685 (1888). 

 Phrynonax, Cope, Proc. Ac. Philad. 1862, p. 348. 



Maxillary teeth 15 to 20, the posterior shghtly enlarged ; anterior 

 mandibular teeth longest. Head distinct from neck ; eye large, 

 with round pupil ; no suboculars. Body elongate, compressed ; 

 scales more or less distinctly keeled, disposed obliquely on the sides, 

 in 21 to 25 rows ; ventrals obtusely angulate laterally. Tail long ; 

 subcaudals in two rows. 



Tropical America. 



Kg. 3. 



Maxillary and mandible of Fhrynonax sulphurens. 



Synopsis of the Species. 

 I. Scales in 21 or 23 rows. 



A. Scales strongly keeled on the middle of the back. 



Three postoculars ; temporals 1 + 1 . 

 Two postoculars ; temporals 2 + 2 . 



1. sulpjiureus, p. 19. 



2. poscilonoius, p. 20. 



B. Scales feebly keeled. 



Preeocular separated from the frontal ; 



ten upper labials 3. guentheri, p. 20. 



Prwocular separated from the frontal ; 



nine upper labials 4. lunulatus, p. 21. 



