2010 Bulletin //, United States National Museum. 



2377. GYMNOCANTHUS GALEATUS, Bean. 



Head 3| (including caudal) ; depth 7|. D. XI, 16; A. 19; V. I, 3. Body 

 elongate. A small tubercle above each eye; 4 preopercular spines, the 

 longest about as long as eye, and with 2 or 3 processes. Space between 

 eyes deeply concave, completely covered with bony granulations, as are 

 the crown and neck ; similar granulations on hinder margin of orbit, on 

 suborbital stay and on opercle. Skin of body naked. Pectorals, and in 

 males the ventrals also, reaching beyond vent; maxillary reaching to 

 below eye. Slit behind last gill not described. Olivaceous; back with 4 

 distinct brown spots, the longest nearly twice as long as eye, and extend- 

 ing a little below lateral.line, there blending with a wavy lateral stripe; 

 dorsals and pectorals with interrupted black baud; lower fins plain 

 whitish. Dr. Gilbert describes a single male specimen, 210 mm. long, 

 from Chernofski Harbor, Unalaska Island : 



The sexual peculiarities are less strongly marked than in much smaller males of G. 

 pistilliger. The ventrals extend but little beyond the front of the anal fin, and are 

 unmarked. The abdomen is also plain, without the round white spot characteristic of 

 male specimens of G. pistilliger and G. tricuspis. These marks are apparently absent also 

 in the type, as no mention is made of them. The spinous dorsal is not greatly elevated, 

 its longest spine being contained 2 times in the head. It is without distinctive mark- 

 ings, being colored like the soft dorsal, light yellowish, cross-banded with darker. Anal 

 papilla short, 5 mm. in length. Plates on head as in description, covering the inter- 

 orbital region, crown, occiput, and nape as far back as front of dorsal; present also on 

 upper part of opercle, and in a vertical streak immediately behind eye. A very promi- 

 nent tubercle over hinder margin of eye, a constriction behind it. Occipital ridge broadly 

 rounded, without tubercles or conspicuous prominences of any kind, but with 3 smooth 

 areas corresponding in position with the tubercles of G. pistilliger, perhaps present as such 

 in the young. The anterior one is slightly elevated. No superciliary filaments Pre- 

 opercular spines massive, short, with a single fork at tip, no accessory spines developed.* 

 Axil with prickly scales, but without filaments. Dorsal XI, 16; anal 19. Lateral line 43. 

 Head 52 mm. long; depth 32 mm. The depth is there 6 in the total length, not 7 as 

 described for the type. 



Aleutian and Pribilof islands ; known from Unalaska and St. Paul, and 

 Point Barrow, (galeatus. helmeted.) 



Gymnocanthus galeatus, BEAN, Proc.TJ. S. Nat. Mus. 1881, 153, Unalaska (Type, No. 28097. 

 Coll. Sylvanus Bailey) ; JORDAN & GILBERT, Synopsis, 707, 1883 ; GILBERT, Kept. U. S. 

 Fish Comm. 1893 (1896), 425. 



742. LEIOCOTTUS, Girard. 

 Leiocottus, GIRARD, Proc. Ac. Nat. Sci.Phila. 1856, 133 (hirundo). 



Body elongate, covered with thick, smooth skin. Head compressed, nar- 

 rowed above, not externally bony. Mouth small, horizontal, low ; villi- 

 forni teeth in both jaws and on the vomer, none on jbhe palatines; upper 



*Mr. Scofield has the following note on a small specimen (3* inches) collected at Point 

 Barrow, Alaska: 



_ v.^.,. .... ! jr. Y Cubans leaching f to vent. Mouth slightly 

 Upper preopercular spine with 3 sharp points on its upper side. No papilla) 

 or sharp points under pectorals. 



