772 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 



front, and one from the occiput toward the base of the dorsal fin. 

 Each of tiiese has on each side, series of short branches, placed at 

 right angles to the main line, those on opposite sides alternating. 

 Each of these branches has about two ox)en mucous pores. Head 

 short, bluutish, scaleless; mouth moderate, oblique; jaws with rather 

 strong teeth, the anterior canine-like; no teeth on vomer or jjalatines. 

 Branchiostegals 6; gill-membranes separate, free from the isthmus, A 

 single long, low, uniform dorsal flu, consisting of spines only; anal fin 

 similar in form, with 2 small spines; caudal short, joined to dorsal and 

 anal; no ventral fins; pectoral fins very small. Intestinal canal mod- 

 erately' elongate, with 4-G well -developed pyloric cceca. Herbivorous, 

 feeding on algoe. Active fishes, inhabiting tide-pools and crevices 

 among rocks in tha North Pacific. [^ic^Krrrjp, a sword-belt.) 



1118. X. cBsJB-MS Jordan & Gilbert. 



Color olive-brown, yellowish below; sides with marblings of different 

 shades of brown, sometimes with short blackish vertical bars; some 

 round black spots along the back and sides; a black spot behind 

 opercles; numerous black spots on sides of head, forming in older spec- 

 imens light and dark streaks, which radiate from eye across cheeks 

 and opercles, the pale streaks forming reticulations; dorsal with black 

 spots, and a series of bright reddish-brown cross-blotches; pectorals 

 and caudal plain. Head short; nape not constricted; mouth small; 

 maxillary extending to middle of pui)il ; teeth strong, the anterior 

 canine-like, bluntish; about 4 canines in lower jaw, 5 or 6 in the upper, 

 similar to the teeth behind them, but somewhat larger. Abdominal 

 lines meeting on the breast, but not connected with the lower lateral 

 line. Dorsal fin beginning close behind pectoral; nape midway be- 

 tween middle of eye and front of dorsal; anal beginning about a head's 

 length nearer snout than base of caudal; pectoral fin comi^aratively 

 large, longer than the eye, its length about equal to distance between 

 middle and lower lateral lines. Head 7; depth 9. D. LXX; A. II, 50. 

 Monterey to Alaska; smaller than the other species, and living in 

 deeper water. 



(Jordau & Gilbert, Proc. U. S. Nat. Mus. 18H0, 135.) 



11 '79. X. inucosns (Girard) Jordan. 



Blackish green, pale on belly and sides of head, marked posteriorly 

 with olive-green in various pattern; a transverse light-greenish bar at 

 base of caudal; 3 olive brown streaks, radiating backward from eye, 

 paler in the center and edged above and below with blackish, outside 



