Jordan and Eveimann. — Fishes of North America. 3181 
the fiu. Closely allied to OUgocoltus, differing only in the character of the 
anal rays of the male. 
(SiaXdd, divided; «pyd?, anus.) 
•2384 (b). DIALARCHL'S SXYDERI, Greeley. 
Head 31; eye 41 in head; snout 34; D. VIII- 18 or 19; A. 13 to 15; P. 13 
to 15; T. 1, 3. Body elongate, slender, the snout pointed, compressed; 
minute conical teeth on ja-ws, vomer, and front of palatines; jaws equal; 
mouth horizontal, the maxillary 3 in head, reaching a vertical below ante- 
rior edge of pupil. Interorbital space | eye, shallowly grooved, the 
groove leading into a depressed space between the occipital ridges; nasal 
spines large. Margin of preopercle armed with a strong spine, 4 as long 
as ej’e, from the upper border of which at base extends a second spine 
pointing abruptly upward and inward; l)oth spines covered with skin in 
life; margin of opercle ending in a pointed Haji entirely unarmed. Brau- 
chiostegals 6, the membranes broadly united, free from the isthmus. 
Gills 34, a slit behind the last gill. Dorsal fins large, separated by 4 
diameter of eye, whole length equaliug that from caudal to base of 
pectoral; lirst dorsal beginning slightly in advance of margin of opercle, 
upper edge nearly straight, curving abruptly downward from the sixth 
spine; origin of soft dorsal in advance of anal; iiectoral large, reaching 
well beyond the origin of the anal; veutrals almost midway between 
base of pectoral and anal ; anal fiu small, rays all feeble in the female, in 
the male the first ray only greatly enlarged, joined to the second, the 2 
distinctly separated from the rest of the fin, the membranes of all except 
the last 3 or 4 rays deeply emai’ginate. Anal papilla small, present in 
the male only. Cirri very numerous, usually occurring in bunches of 3 
or 4, those of head joined at the base, forming a comb; 2 pairs of bunches 
above orbits, with the rudiments of a third bunch in front of these, 3 on 
top of head, behind orbits, 2 or 3 bunches just below these on side of 
head, 2 or 3 single cirri on margin of preopercle, a thick bunch above the 
preoiiercular spines, 4 or 5 on lower margin of opercle, with a thick bunch 
on its upper margin; a short row above the base of the pectoral; a row 
of bunched cirri along anterior two-thirds of lateral line, another well- 
defined row along the dorsal fiu from the third spine to the sixteenth or 
seventeenth ray of soft dorsal, this row containing a bunch at the base of 
each spine and ray, with the occasional excex^tion of the first ray; 5 or 6 
scattered bunches Ijetween the dorsal and lateral rows on each side of 
body ; a cirrus at the tip of each dorsal si)iue. 
Color, light reddish brown, sometimes almost pink, thickly spotted with 
fine indistinct white spots; 4 or 5 irregular dark brown spots along the 
base of dorsal, a band of same color along lateral line, sometimes vei'y 
much broken and extending ventrally, shading into the uniform reddish 
brown below, and including 3 or 4 round pinkish spots; a dark brown 
post-ocular line, another running forward from the eye, a patch of same 
color on t(q> of head, another on side of head, and 2 or 3 on edge of 
opercle; throat reddish brown with several distinct white spots; belly 
bluish green; a silvery white patch I)etwe(!U the bases of the pectorals; 
dorsal tins pale reddish brown with black and clear spots; pectoral 
