from the Andes of South America. 23 



Very closely allied to S. simonsii, Blgr., but I'orni more 

 slender, dorsal scales more strongly keded, and caudal scafes 

 not spinose. 



Ech inosau ra lyalmeri. 



Snout pointed, longer than broad ; frontonasal divided into 

 two by a longitudinal suture ; one pair of elongate prie- 

 frontals, a large frontal, twice as long as broad, a pair of 

 small frontoparietals, two supraoculars, tlie rest of the upper 

 surface of the head with UTiequal-sized flat scales; fronto- 

 nasals striated, the other head-shields smooth ; nasal single, 

 followed by a large loreal ; a series of suboculars ; five upper 

 and four lower labials ; an azygous chin-shield, followed by 

 two pairs, the anterior of which is large. Dorsal scales 

 minutely granular, with interrupted series of large keeled or 

 conical tubercles ; four series of these tubercles on the uape; 

 numerous tubercles on the limbs. Ventral shields smooth, in 

 8 longitudinal and 27 transverse series. Three transverse 

 series of anal shields. 6 femoral pores on each side. En- 

 larged tubercles on tail keeled, few, forming transverse series. 

 Dark brown above, with two longitudinal series of large pale 

 spots ; belly pale brownish, spotted with black. 



mm. 



Total length 147 



Head 17 



Width of head 10 



From end of snout to fore limb 26 



From end of snout to vent 62 



Fore limb 18 



Hind limb 27 



Tail (reproduced) 85 



A single male specimen from Noananoa, Rio San Juan, 

 Choco, S.W. Colombia, 100 feet, from the collection of 

 Mr. G. Palmer. 



Well distinguished from the type of the genus, E. Ixorrida, 

 Blgr., by the different head-shields, the absence of a double 

 vertebral ridge, the less spine-like tubercles on the throat 

 and body, and the smooth ventral shields. 



P rionodactylas spinalis. 



Snout short ; body moderate. Upper head-shields smooth ; 

 frontonasal single ; prasfrontals forming a median suture; 

 frontal not or but slightly longer than the frontonasal ; 

 frontoparietals smaller, much smaller than the interparietal 

 and parietals, which are subequal or the latter the broader ; 



