234 Field Columbian Museum — Zoology, Vol. V. 



on the nape and on anterior part of the body very small; head naked; 

 dorsal fins lower than depth of body; caudal fins rounded. 



Color yellowish olive, back and sides reticulate with darker; head, 

 dorsal, caudal and pectoral fins dotted with blackish; 6 cross series of 

 dots on caudal ; an irregular, small blackish spot on upper part of base 

 of pectoral (Gunther.) 



This species is known only from the above description. 



89. Gillichthys Cooper 



Gillichthys Cooper, Proc. Cal. Acad. Sci., 1863, 109. (Type, Gil- 

 lichthys mirabilis Cooper.) 



Body moderately elongate, compressed, covered with small 

 cycloid embedded scales; belly and head naked; scales in the young 

 more or less ciliated; eyes almost superior; gape wide, the maxillary 

 in the adult inordinately developed, prolonged backward to the base 

 of the pectorals, its posterior part a cartilaginous expansion connected 

 to an expansion of the skin of the lower jaw, thus forming a channel 

 backward from the mouth; teeth small, even, and in broad bands; 

 pectorals large; isthmus broad. 



224. Gillichthys detrusus Gilbert & Scofield. Long-jawed Goby. 



Gillichthys detrusus Gilbert & Scofield, Proc. U. S. Nat. Mus., 1897, 

 498, pi. 38; Horseshoe Bend, mouth of Colorado River: Jordan 

 & Evermann, Bull. 47, U. S. Nat. Mus., 1898, 2251. 



Known only from the lower portion of the Colorado River. 



Head 3X; depth 5; D. vi-13; A. 11; scales about 25-75. Body 

 robust, somewhat compressed posteriorly; head large, depressed; 

 mouth very large, the maxillary 1 Y$ in head; mandible 1%', snout 4; 

 interorbital 5^; eye small, 7 in head; dorsal fins not connected, the 

 space between them equaling half length of spinous portion ; pectoral 

 1^4 i n head; the post frontals small, projecting very little; least depth 

 of caudal peduncle 2 2 3 in head. 



Color a very pale olive, some with dark punctulations about, the 

 head and fins ; the pale coloration probably due to their life in shallow 

 water on the bottom of pale sand. Length about 5 inches. 



Family XXIII. Soleida*. 



The Soles. 



Body oblong or elongate, usuallv scaly; mouth very small, more 

 developed on eved side; teeth in bands, very small or obsolete; edge of 

 preopercle adnate, concealed by the skin and scales; gill openings 

 narrow, the membranes adnate to the shoulder girdle above; paired 



