PEROPUS 63 



than high, with a median cleft above, bordered behind by a pair 

 of large supranasals, which are in contact medially; nostril 

 bordered by rostral, first labial, two or three postnasals, and a 

 supranasal ; nine or ten upper labials, the scales bordering them 

 above more or less enlarged; granules on snout rather large, 

 regular, with a few rows of smaller, more-elongate scales above 

 labials ; a slight longitudinal depression on forehead, which nar- 

 rows between nostrils and continues to rostral; a slight depres- 

 sion behind nostrils ; eight lower labials, the three anterior ones 

 larger than the upper ; last two very small ; mental large, trian- 

 gular, strongly differentiated from adjacent labials ; two median 

 chin shields large, more than twice as long as wide, in contact 

 with mental and first lower labial, and forming a long median 

 suture ; a second pair of chin shields, one on either side of median 

 ,pair, elongate, in contact with two labials and first pair of chin 

 shields; behind these two or three rows of somewhat enlarged 



a 



Fig. 6. Peropus mutilatus (Wiegmann) ; after Stejneger ; a, chin; b, head, lateral view; c, 



underside of foot ; X 4. 



scales bordering labials; chin covered with rounding, imbricate 

 scales, irregular in size, those bordering chin shields smallest; 

 body covered above with small rounding scales, imbricating more 

 or less, those on sides largest and irregular, those on occiput 

 smallest; belly with cycloid, imbricate scales; a doubly curved, 

 continuous series of thirty-eight preanal and femoral pores, an- 

 gular medially; pores large and oblong; a slight lateral fold 

 suggested and also one on posterior aspect of hind leg; toes 

 slightly webbed at base, widened at tip, with eight pairs of 

 lamellae under longest toe, seven under shortest toe; tail rather 

 flattened, with broad transverse plates below, and a sharp, finely 

 serrated edge ; granules small, not arranged in regular transverse 

 rows ; no spines or tubercles ; regenerated part of tail wider and 

 flatter, the scales more irregular above, the transverse plates 

 below wider and narrower. 



