CALLOSELASMA RHODOSTOMA. 391 



Peltopelor macrolepis. (Plate XXIII. fig. C.) 



Trimesurus macrolepis, Beddome, Madras Quart. Journ. Medic. Sc. vol. v. 



This most singular snake may be at once recognized by the very large scales with which 

 the head and body are covered. Those on the head have somewhat the appearance of 

 shields, being more or less truncated behmd, imbricate ; they are regularly arranged, and 

 much in the manner of shields : there are a pair of anterior and a pair of posterior frontals, 

 both of rather small size, and the latter separated from each other by one or two small 

 scales ; there is a large subhexagonal vertical and a large supraciliary. The occiput is 

 covered by a large central and by two or three pairs of lateral occipitals. Rostral shield 

 small, triangular, erect; nasal simple, pierced by the small round nostril; a narrow prse- 

 ocular above, and another below the facial pit ; a crescent-shaped narrow shield forms the 

 posterior and inferior margins of the orbit. Seven upper labials, the second of which forms 

 the front part of the pit, the others of moderate size, the last being smaller than the 

 middle ones; temporal scales 1 + 1. The scales are very large, much imbricate, keeled, 

 quincuncially arranged, in twelve series ; those in the outer series are the smallest. Ven- 

 trals 134-138; anal entire; subcaudals 58-56. Uniform green ; dark olive-green in adults, 

 bright grass-green in young ones ; a yellow line along the outer series of scales ; lower parts 

 pale green. 



This species was discovered by Captam Beddome in the Anamallay Mountains ; the largest 

 specimen is 21 inches long, the tail measuring 4| inches. It is a Tree-snake, closely allied 

 to Trimeresurus. 



CALLOSELASMA. 



CaUoselasma, Cope, Proc. Acad. Nut. Sc. Philad. 1859, p. 336. 



Head trlaiii^ular, pointed In front, covered with the normal number of 

 shields above. Body of moderate length, with smooth scales, in twenty-one 

 series. Tail of moderate length, not prehensile, terminating- in a long- spine- 

 like scale. Subcaudals two-rowed. 



Only one species is known. 



CALLOSELASMA RHODOSTOMA. 



Russell, Ind. Serp. ii. pi. 21. 



TrigonocepLalus rhodostoma, Reinw. Ms, 1827, p. 561. Schleg. Phys. Serp. ii. p. 547. pi. 20. 

 figs. 1-3, & Abbild. p. 59. pi. 19. 



Snout triangular, pointed, broader than long. Frontals well developed, not broken up 

 into smaller shields ; the anterior frontals are small, triangular, longer than broad, pointed 

 in front. Seven, sometimes eight, upper labials : the second is very small, not entering the 



