216 MEMOIRS OF THE CARNEGIE MUSEUM. 



1900, the largest breeding female, sixty-three millimeters in total length, being taken 

 as the type. 



Head 3.14 in length of body to base of caudal (50 mm.) ; depth equal to head; 

 D. Ill, 7; A. II, 6; scales in lateral line 34; in transverse series between insertions of 

 vertical fins 3.5-2.5; pharjmgeal teeth 5, 2-2, 5. 



Snout slightly longer than eye, which is 3.75 in head; tip of premaxillaries at, 

 or below, level of lower margin of orbit; mouth but little oblique; barbel long, one- 

 half to two-thirds diameter of eye, its base under the posterior nostril; maxillary 

 ending under the anterior margin of the eye; distance from snout to occiput 5 

 in body length; gill-rakers very short and soft, 2 or 3 on each limb of first arch; 

 pharyngeal teeth smooth, unserrated, the tips bent toward the lateral surface of each 

 tooth, a grinding surface present; breadth of body more than half its depth, which 

 is greatest at the insertion of the dorsal and slopes evenly to the rather deep caudal 

 peduncle, the length of which is contained 1.33 in head and its depth 2.5 in head. 



Dorsal inserted, as in all known species of the genus, nearer the snout than 

 the base of the caudal by the length of the former; its margin straight, each ray 

 extending beyond the following one when supine, the first branched ray the longest, 

 1.12 in head; anal inserted under twenty-second scale of lateral line and beyond tip 

 of dorsal rays, its margin straight, the tips coinciding when supine, extending more 

 than half the distance between last anal ray and the first of the caudal, the length 

 of the longest ray 1.6 in the head; pectorals extending more than two-thirds of the 

 distance to the base of the ventrals, failing to reach them by the diameter of the 

 pupil, their length nearly equal to the distance between the snout and the occiput; 

 ventrals reaching anus, their length less than that of the pectorals by half the 

 diameter of the pupil, the anus removed from the first anal ray by two-thirds the 

 diameter of the eye, and by two and one-half scales; caudal nearly equal to length 

 of head. 



Lateral line but slightly decurved, complete; scales of middle line of back 

 much enlarged, especially behind the dorsal, where they are slightly over twice the 

 diameter of those on either side of them; before the dorsal there are three rows 

 between the central row and the lateral Hne, while behind the dorsal there are two. 



Color-pattern lacking, save for a spot of dark at the base of the first dorsal 

 rays; space above the lateral line with irregular spots the size of the scales, the edges 

 of which are occasionally pigmented; scales of the lateral line in the type pigmented 

 where overlapped by the preceding scales; an indistinct dark line or stripe along 

 side behind dorsal, continued anteriorly in an unpigmented space; caudal spot 

 lacking; peritoneum silvery, with small spots of black. 



