2286 Bulletin 4.7, United States National Museum. 



rable, the last spine not much shorter than the longest, which is 2i 

 head; longest anal ray 2, pectoral 2^. Vertebra} 10 + 17 = 27. Body 

 olivaceous, with 5 broad faint dusky cross shades; head with many 

 round black spots of varying sizes, some as large as pin heads, the largest 

 below and between eyes, covering both jaws and the membrane of the 

 maxillary, few on cheeks, most numerous on forehead; similar spots 

 extending along side of back to end of lateral line; dorsal dusky, with 6 

 round dusky blotches at its base, corresponding to the dark shades on 

 body; caudal, anal, and pectorals plain dusky olive; ventraLs blackish. 

 Gulf of California; known from 1 specimen collected by Dr. Gilbert in 

 San Luis Gonzales Bay. The species is close to G. rhomalea, but has a 

 different dorsal tin and lateral line. Type, No. 2014 L. S. Jr. Univ. Mus., 

 about 8 inches long. (Named for John O. Snyder, curator of fishes in 

 Leland Stanford Junior University.) 



2624. ONATHTPOPS MYSTACINA, Jordan. 



Head 81^2 in length (3| to tip of caudal); depth 4^- (5g). D. 23 or 24 

 (X, 14); A. II, 11; lateral line with about 54 tubes; 100 scales between 

 gill opening and caudal. Head rather elongate, very blunt in pi'ofile; 

 snout very short, not longer than pupil; eye large, about 3 J in length; 

 maxillary If in length of head, 5 in length to base of caudal, 6J in total 

 length to tip of caudal; end of maxillary abruj)tly truncate, not ending 

 in a flexible lamina, the supplemental bone well developed; lower jaw 

 slightly included. Teeth in each jaw in a narrow band, the outer slen- 

 der, enlarged ; vomer with about 4 slender teeth ; palatines toothless. 

 Gill rakers long and slender. Gill membranes nearly separate, free from 

 the isthmus. Scales very small; lateral line extending to below anterior 

 part of soft dorsal, its length ^ that of head. Dorsal spines not distin- 

 guishable from the soft rays, the rays apparently fewer than usual, none 

 ol' them A'ery high, the last ray 2| in head; caudal short, apparently trun- 

 cate, 1^ in head; anal rather low; pectorals 2 in head; ventrals 1|. Color 

 nearly plain olive green, without bands or spots on body or fins; vertical 

 fins tipped with blackish; maxillary with a faint median blackish stripe; 

 pectoral with 2 dusky cross shades; no black or white on lining mem- 

 brane of jaws. Length 31 inches. Deep waters of Gulf of Mexico; the 

 few specimens known from the stomachs of Red Snappers (Ncommiis ay a) 

 from the Pensacola Snapper Banks. It resembles Opisihognathus loiivhu- 

 rum, but the scales are smaller, {/tivdra^, mustache, from the maxillary 

 stripe). 



Gyiathypops mystacinus, Jordan, Proc. TJ. S. Kat. Mus. 1884, 37, Snapper Banks off Pensa- 

 cola. (Coll. Joiilau & Stearns. Type, 34976, U. S. Nat. Mus.) 



843. LONCHOPISTHUS, Gill. 



Lonehopistlnm, Gill, Troc. Ac. Nat. Sci. Pbila. 1862, 241 (micrognathus). 



This genus differs from Giiathypops in the slender, compressed body, 

 the still smaller maxillary and the lanceolate caudal fin. The single spe- 

 cies is A'ery rare, i^-oyxv, lance; O7ti60s, behind, from the form of the 

 caudal.) 



