2253 Bulletin ^7, United States National Mtisetim. 



on premaxillaries. Shoulder girdle witli 2 or 3 small cutaneous flaps on 

 ils iuner edge. Fins moderat(3; dorsal of 5 spines and 16 soft rays, the 

 spines unconnected with the rayed portion, the space hetween them about 

 equal to \ diameter of eye; the spiues weak and flexible, their length \ 

 that of liead ; soft dorsal beginning at a point a little nearer end of snout 

 than tip of caudal and exteudiug nearly to caudal, its height about 

 equal to that of spinous portion, the first few rays slightly graduated; 

 anal haviug 15 rays and beginning a little behind origin of soft dorsal, 

 the rays about equaling those of dorsal in length ; pectorals moderate, 

 inserted a little below axis of the body, their length greater than depth 

 of body, their tips reaching a vertical from posterior part of spinous 

 dorsal; vcntrals united, but not adnate to belly, inserted slightly in front 

 of pectorals and their tips not quite reaching those of pectorals. Ground 

 color light; head and body pretty uniformly covered with dark punctula- 

 tions ; au irregular dark bar across occiput ; breast and belly pale ; a row 

 of 9 or 10 small dark blotches along middle of side, the one at base of 

 caudal plainest and having a shape something like the Greek letter 2"; 

 about 6 dark blotches along median line of back ; peritoneum dark. 

 Length about If inches. Pacific coast of North America, from Guaymas 

 to Vancouver Island ; excessiA^ely abundant from San Diego southward in 

 mudflats; specimens recorded from Saauich Arm, Vancouver Island, San 

 Diego, mouth of Colorado River, San Luis Gonzales Bay, St. Georges Bay, 

 Concepcion Bay, Guaymas, and La Paz. It was at first confounded with 

 the young of Gillichihys mirahilis, from which genus it difl^rs in the pres- 

 ence of dermal flaps on the shoulder girdle. * {cauda, tail, which has a 

 Y-likemark.) 



Gillichthys y-cauda, Jenkins & Evekmann, Proc. U. S. Kat. Mus. 1888, 147, Guaymas, 

 Sonora. (Type, No. 39637. Coll. Jenkins & Everniaiin.) 



Qnietvla y-cauda, Joedan &. Stakes, Proc. Cal. Ac. Sci. 1895, 839. 



Gillichthys guaymaKi(e,f JENKINS Sc Evermann, Proc. TT. S. Nat. Mus. 1888, 148, Guaymas, 

 Sonora ; young .specimens 2^ inches long. (Type, No. 39637. Coll. Jenkins & Ever- 

 mann.) 



* "The cranium is similar to that of Gillichthys mirahilis, the occiput being depressed, 

 wedge-shaped, uaiTowed anteriorly "with a bhint median carina, the suitraorbital and 

 temporal ridges not continuous behind the eye. As iu Gillichthys mirabilis, the supra- 

 orbital ridges end iu wing-like expansions iuimediatelv behind the interorbital space." 

 (Gilbrrt.MS.) 



] Gillirhthys guaymasice is thus described: Head 3 (3| in total); depth 6 (7). D.V-14; 

 A. 13; eye 5. Body quite slender, elongate, but little compressed; head long, narrow, 

 not much widened bt;hind the eyes, not depressed, forming ^ the length to base of caudal. 

 Profile gently .arclied from snout to \ the distance to dorsal lin, from there nearly straight 

 to dorsal, and then gently curved to caudal peduncle; ventral outline nearly straight; a 

 considerable prominence on tlie snout made by the enlarged end of the tiirbinal bone. 

 Eye somewhat above the median line, not quite equaling the snout in length ; interorbital 

 space narrow, 1^ times in the eye. The maxillaries are much produced, in some sped 

 mens nearly reaching the gill openings, broadest at the middle, and tapering to a blunt 

 point posteriorly; premaxillaries not protractile, but little movable at the symphysis, 

 more than h as long as the maxillaries. Gill rakers 2 above the angle, 10 below, short and 

 blunt, the first 4 the largest, those on the second arch but little developed. Teeth well 

 developed, in a single series, on mandible and premaxillaries, all slightly curved back- 

 ward. Tongue not so broad as in Gillichthys iiurahiUK. Cooper; it is gently rounded at the 

 tip, which is free for a much greater length than in Gillichthys viirahitis. Peritoneum 

 black or blackish, and the intestine short, but little longer than the head, and not at all 

 convoluted. Scales small, enibe<lded, and scarcelv perceptible except on sides; no pores 

 appear to be developed. First dorsal of fine flexible spines, distance of origin from snout 

 2g length of body, and separated from the second dorsal by a distance but little greater 

 than length of snout; second dorsal of 14 ravs of nearly equal length, which equals the 



