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. III, 7; A. II, 6; seales in lateral line 34; in transverse series between insertions of 
vertical fins 3.5-2.5; pharyngeal 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 line, 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. 
