346 



BULLETIN 58, TTNITED STATES NATIONAL MUSEUM. 



1820. Coluber blumenbachii Merrem, Syst. Amph., p. 119 (type-locality, Ben- 

 gal). — Coryphodon blumenbachi Jan, Elenc. Ofid., 1863, p. 64 (Bengal; 

 Ceylon; Japan); Icon. Ophid., livr. 24, 1867, pi. in, figs. 2-3 (Ceylon; 

 Bengal). 



1839. Coluber dhuvina Cantor, Proc. Zool. Soc. London, 1839, p. 51 (type-locali- 

 ties, Carnatic, Orissa, Bengal, Nepal, Assam, Arracan, Tenasserim). 



1860. Leptophis trifrenatus Hallowell, Proc. Phila. Acad., 1860, p. 503 (type- 

 locality, Hongkong; type, U.S.N.M., No. 7510). 



1867. Coryphodon blumenbachi var. carinata Jan, Icon. Opliid., livr. 24, pi. in, 

 fig. 4 (type-locality, "Japan;" type in Mus. Genova) (not C. carinatus 

 Guenther, 1858). 



Description. — Adult male: IT.S.N.M. No. 7510, type of Leptophis 

 trifrenatus; island of Hongkong;; April, 1854; Lieutenant Brooke, 



298 



Figs. 298-3(10.— Ptyas mucosus (type of trifrenatus). Nat. size. l98, top of head; 299, side 



OF head; .300, UNDERSIDE OF HEAD. No. 7510, U.S.N.M. 



collector (figs. 298-3(H)). Rostral broader than high, somewhat pro- 

 jecting; internasals as long as broad, much smaller than prefrontals, 

 which are in contact with supraocular; frontal as long as its distance 

 from rostral and as the interparietal suture, nmch broader in front 

 than behind, the lateral edges distinctly concave; supraocular large, 

 as wide as the frontal at its lateral convexity; parietals broad, as long 

 as the distance of frontal from tip of snout; nostril large, vertically 

 elliptic betw^een two subequal nasals; three loreals, one larger anterior 

 followed by two smaller, one above the other; one preocular not in 

 contact w^ith frontal; a subpreocular; eye rather large, its diameter 



