294 



o-u, <? (V. 181, 180; C. Demerara. 



89, 88) & $ (V. 173, 



174,174, 182,182; C. 



82, 84, 76, 82, 102). 

 v-rj. <? (V. 181, 181, 174; Berbice. 



C.90,9o,86),$(V.176, 



173,174,177,172,180; 



C. 84, 85, 74, 79,75, P), 



& yg. (V. 178, 181 ; C. 



73, 90). 



6. c? (V. 192; C. 92). Pernambuco. 

 t. Skeleton. Berbice. 



Mr. Snellgrove [C.]. 



J. P. G. Smith, Esq. [P.], 



110. TROPIDODIPSAS. 



Tropidodipsas, Giinth. Cat. Sn. p. 180 (1858), and Zool. Rec. 1872, 



p. 75. 



Galedon, Jan, Elenco sist. Ofid. p. 95 (1863). 

 Leptognathus, part., Jan, I. c. p. 100 ; Cope, Proc. Ac. PhUad. 1868, 



p. 107. 



Tropidogeophis, F. Mull. Verh. not. Oes. Basel, vii. 1878, p. 411. 

 Tropidoclonium, part., Bocourt, Miss. Sc. Mex., Rept. p. 738 (1893). 



Maxillary short, with 12 to 16 teeth, which decrease in size in 

 front and behind ; posterior mandibular teeth gradually decreasing 

 in size. Head distinct from neck ; eye moderate or large, with 

 vertically elliptic pupil ; praeoculars may be absent. Body elongate, 

 cylindrical or a little compressed ; scales smooth or feebly keeled, 

 without pits, in 13 to 17 rows ; ventrals rounded. Tail moderate ; 

 eubcaudals in two rows. 



Central America. 



Synopis of the Species. 



I. Eye rather large ; loreal shield not entering the eye ; two pnc- 



oculars ; frontal a little longer than broad. 



Scales in 1 7 rows 1. fasciata, p. 295. 



Scales in 15 rows 2. phiUppii, p. 295. 



II. Eye moderate. 



A. Scales feebly keeled, in 17 rows ; one or two prseoculars. 



Loreal at least once and two thirds as long as 



deep, entering the eye ; frontal not broader 



than long ; six upper labials 3. fischeri, p. 296. 



Loreal short, entering the eye or separated 



from it by the praeoculars ; frontal a little 



broader than long 4. sartorii, p. 296. 



B. Scales smooth, in 15 or 13 rows ; no praeocular. 



Scales in 15 rows ; frontal as long as broad. 5. annulifera, p. 297. 

 Scales in 13 rows: frontal longer than broad. 6. anihracops, p. 297. 



