1 20 colubridvt;. 



D. Pupil round ; head small, not or 

 but slightly distinct from neck ; 

 scales smooth. 



1. Nostril pierced in a moderately- 



large, single or divided nasal ; 

 eye moderate. 

 Snout more or less projecting; rostral shield 

 large ; posterior maxillary teeth strongly 



enlarged ; scales in 17 to 21 rows Simotes, p. 147. 



Snout not projecting ; maxillary teeth equal; 



scales in 13 or lo rows Ablabks, p. 151. 



2. Nostril pierced between a nasal 



and the first labial ; eye small ; 



no internasals; scales in 15 rows. MACROCALAMTJS,'p. 1-53. 



3. Nostril pierced in a minute nasal ; 



eye small ; no temporals ; parie- 



tals in contact with labials. 



Internasals present ; scales in 15 rows .... Pseud orhabdium, p. 154. 



No internasals ; scales in 13 rows Calamaria, p. 154. 



Genus POLYODONTOPHIS. 



Bouleng. Faun. Ind., Ptept. p. 301 (1890). 



Teeth very numerous and closely set, 35 to 50 in each maxillary, 

 equal in size. Dentary bone completely detached from the arti- 

 cular posteriorly. Head small, not or but shghtly distinct fropi 

 neck; eye moderate or rather small, with round ])upiL Body 

 cylindrical, elongate; scales smooth, without apical pits, in (17 or 

 19) rows. Tail moderate or long ; subcaudals in two rows. 



South-Eastern Asia, Madagascar, and Comoro Islands ; Central 

 America. 



Two species in the Malay Peninsula : — 



9 upper labials, 3 entering the eye ; ventrals 144- 



169 ; subcaudals 89-145 P. gemmatus, p. 120. 



7 or 8 upper labials, 2 entering the eye ; ventrals 



205-236 ; subcaudals 54-70 P. sor/ittarius, p. 121. 



123. Polyodontophis geminatus. 



Coluber (jeminatns, Boie, Isis, 1826, p. 211. 



Ablahes melanocephalus, Giinth. Rept. Brit. Ind. p. 229 (1864). 



Polyodontophis f/eminatus, Bouleng. Cat. Sn. i, p. 185 (1893). 



Eostral twice as broad as deep ; suture between the internasals 

 shorter than that between the prsefrontals ; frontal longer than 

 its distance from the end of the snout, shorter than the parietals ; 

 loreal as long as deep or a little deeper than long ; 1 pr?eoeular ; 

 2 ])Ostoculars, both in contact with the parietal ; temporals 2 + 2 ; 

 9 upper labials, fourth, fifth, and sixth entering die eye; 4 lower 

 labials in contact with the anterior chin-shields, which are as large 

 as tlie ])Osterior. Scales in 17 rows. Ventrals 144-169 ; anal 

 divided; subcaudals 89-145. Brown or blackish above, with two 

 y/ghter, yellowish or bluish-grey longitudinal streaks each of 



