CnERSYDBUS. 355 



ventrals, wliitb are well developed ; tail long, with single sub- 

 caudal s. 



This genus is allied to Xenodermus, Eeinh., but differs in the 

 equal dorsal scales and the presence of large symmetrical shields 

 on the upper surface of the head. A single species. 



442. Stoliczkaia khasiensis. 



Stoliczkia khasiensis, Jerdon, P. A. S. B. 1870, p. 81 ; Theob. Cat. 

 p. 205. 



Eostral extremely small ; a pair of small interuasals ; a pair of 

 very large praefrontals ; frontal broader than long and shorter than 

 the praefrontals ; supraocular very narrow ; pai"ietals nearly twice 

 as long as the frontal ; nostril in a single nasal ; a loreal ; a 

 large pra^ocular and t\\ o postoculars ; upper labials 8, fifth and 

 sixth entering the eye, eighth much elongate ; temporals small, 

 scale-like ; a single pair of small chin-shields, in contact with '6 

 lower labials. Scales in 30 rows, dorsals separated by naked skin, 

 laterals larger aud juxtaposed. Ven*^rals 210; anal entire; sub- 

 caudals 115. Purplish brown above; three or four outer rows of 

 scales and ventrals white with brown edges. 



Total length 2(J-5 inches ; tail 7*5. 



Hah. Khasi Hills. A single specimen is known, and no obser- 

 vations were made on its habits. 



Genus CHERSYDRUS, 



Cuvier, Regne, Animal, ii, p. 75, l8l7. 



Teeth moderately large, subequal, about 12 in each maxillary. 

 Head not distinct from neck, small, covered with small juxtaposed 

 scales ; nostrils close together on the top of the suout ; eye very 

 small, with vertically subelliptic pupil. Body compressed, stout ; 

 scales very small, rhomboidal, with a short tubercle-like keel, 

 spinose on the belly ; no ventrals ; a fold of the skin running 

 along the median line of the abdomen ; tail short, compressed, 

 prehensile, scaled like the body. 



A single species. 



Chersydrus is the Aglyphous I'epresentative of the Hydrophids, 

 with which it agrees in its mode of life aud general appearance. 



443. Chersydrus granulatus. 



Hydrus granulatus, Schnekl. Hist. Anqili. i, p. 243. 



Acrochordus fasciatus, Shaw, ZogI. iii, p. 576, pi. cxxx; Schley. 



Fhys. Serp. ii, p. 429, pi. xiv, figs. 14-1(5. 

 Chers\di-us fasciatus, Cuv. Reyne An. 2nd ed. ii, p. 98; Dum. ^ 



liibr. Erj). Gen. vii, p. 41 . 

 Acrochordus granulatus, Cantor, J. A. S. B. xvi, 1847, p. 906. 

 Cliersvdrus granulatus, Giinth. Rept. B. I. p. 336; Theod. Cat. 



p. 186. 



2a2 



