CROCODILIANS, LIZARDS, AND SNAKES. 465 



SYNOPSIS OF GENERA. 



Claws partly exposed ; lower surface of digits granular Hemitheconyx Stejneger. 



Claws partly exposed; lower surface of digits lamellar Eublrpharis Gray. 



Uemithevonyx has one species, which is West African. Euhlepharis 

 has six species, of which two are from India, three from Central America 

 and Mexico, and one from the Southwest of the United States. 



EUBLEPHARIS Gray. 



Euhlepharis Gray, Phil. Mag; II, 1827, p. 56; Zool. Journ., Ill, 1828, p. 223; Cat. 



Liz., 1845, p. 170.— Wagler, Syst. Aniph., 1830, p. 143.— Fitzixgek, Syst. 



Kept., 1843, 1). 90.— GfNTHER, Kept. Brit. Ind., 1864, p. 119.— Boulengkh, 



Cat. Liz. Brit. Mus., I. 1885, p. 230. 

 Giimnodacti/Iua Wikgmaxx, part, Herpt. Mex., 1834, p. 19. 

 Coleonyx Gray, Ann. Mag. Nat. Hist., XVI, 1845, p. 162. — BocouuT, Miss. Sci. 



Mex. Kept., 1873, p. 49.— Boulexger, Cat. Liz. Brit. Mus., 188.5, 2d ed., I, 



p. 234. 

 Brachydactylus Peters, Monatsber. Berl. Akad., 1863, p. 41. 



Belly covered with regular small hexagonal scales; rest of body and 

 head (except on edges of mouth) covered with small regular granules, 

 sometimes mixed with larger scales. Jaws each margined with a single 

 series of labial plates, the granules maigining these a little larger. 

 Eyelids much developed; pupil vertical. External ear distinct. A 

 short spine at each side of the base of the tail. Tail cylindrical all 

 round, with very short whorls of small square plates constricted at base. 

 Digits conical, not dilated; denticulated along the edges beneath with 

 two or three series of transverse tubercles, the central largest and 

 lamellar. Claws very small, not retractile, partially concealed by two 

 lateral and one superior scale. First digit not opposable to the others. 

 No crests or folds of skin. Skin of body very loose. Xo palatine teeth. 

 Jaw teeth straight, conical-truncate, and pleurodont. Hind feet shorter 

 than tibia. Male with i)reanal pores. 



Dr. Bouleuger' distinguishes the E. elef/ans Gray, of Mexico and 

 Central America, as the type of a distinct genus Coleonyx, following 

 Gray, on the ground that the claws are completely concealed in the 

 latter. I find the characters of the E. elegans and the E. varietjatus 

 to be identical in this respect, and so can not separate them generically. 



Anatomi/. — Owing to the isolated i)osition of this genus, its osteology 

 is worthy of especial attention. The premaxillary is undivided, and 

 has a long superior spine, but no inferior spine. The nasals are distinct. 

 Tlie frontals are coossifled, and the interorbital space is very narrow. 

 The parietals are coossilicd, and there is no pineal foramen. The 

 supraoccipital is loosely articulated anteriorly, but is coossified with 

 theexoccipitals. No lachrymal bone; prefrontal large, but not reaching 

 far posteriorly over orbit. Postfrontal small, crescentic ; no postorbital. 

 No postorbital or supratemporal arches. Parietoquadrate arch de- 



' Catalogue, Lizards of the British Museum, 1, 1885, p. 234. 

 NAT MUS 98 30 



