294 COLTTBEID^. 



0-u. iS (V. 181, 180 ; 0. Demerara. Mr. SneUgrove [0.]- 



89, 88) & ? (V. 173, 



174,174, 182,182; 0. 



82, 84, 76, 82, 102). 

 v-v- <J (V. 181, 181, 174; Berbice. 



O.90,95,86),$(V.176, 



173,174,177,172,180; 



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



& jg. (V. 173, 181 ; 0. 



73, 90). 

 e. S CV. 192; C. 92). Pernambuco. J. P. G. Smith, Esq. [P.]. 



I. Skeleton. Berbice. 



110. TROPIDODIPSAS. 



Tropidodipsas, Gunih. Cat. Sn. p. 180 (1858), and Zool. Bee. 1872, 



p. 76. 

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

 Leptognatlms, part., Jan, I. c. p. 100 ; Cope, Proc. Ac. Philad. 1868, 



p. 107. 

 TropidogeopLis, F. Mull. Verh. not. Ges. Basel, vii. 1878, p. 411. 

 Tropidoclonium, part., Bocourt, Miss. So. Mex., Bept. 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 ; prseoculars 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 ; 

 subcaudals in two rows. 



Central America. 



Synopis of the Species. 



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



oculars ; frontal a little longer than broad. 



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



Scales in 15 rows 2. pMlippii, 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 prseoculars ; frontal a little 

 broader than long 4. sartorii, ji. 296. 



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



Scales in 15 rows ; frontal as long as broad. 6. anmdifera, p. 297. 

 Scales in 13 rows; frontal longer than broad. 6. anthracops, p. 297. 



