596 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 



938. D. fiircatam (Grd.) Guntlier. 



Light olivaceous, silvery below, sometimes yellowish; scales with 



bright reflections, but no red markings 5 usually a round dusky spot 



on the anal ; ventrals plain ; caudal fin edged behind with dusky ; fins 



usually yellowish tinged. Body oblong elliptical, compressed, tapering 



backward into the long and slender caudal peduncle; mouth small; 



teeth rather large, conical; gill-rakers very short and slender; last 



dorsal si)ine highest, sometimes higher than the soft rays, the fin 



higher than in D. atripcs ; caudal fin strongly forked, the upper lobe 



usually the longer. Head 3f ; depth 2J ; D. X, 24 ; A. Ill, 32 ; Lat. 1. 



66. L. 1 foot. Coast of California; extremely abundant from Cape 



Mendocino southward. 



(Phanerodon furcatus Girarcl, Proc. Acad. Nat. Sci. Phila. 1854, 163, aud iu U. S. Pac. 

 K. R. Surv. Fish. 184; Guuther, iv, 247.) 



323.— RHACOCHIL.US Agassiz. 

 (Agassiz, Am. Journ. Sci. Arts 1854, 367: type Bhacochilus toxotes Agassiz.) 



Body ovate, compressed, tapering abruptly into a long and robust 

 caudal peduncle ; mouth comparatively large, the lower jaw included ; 

 lips extremely thick, the lower without frenum, its posterior free edge 

 coarsely lobed; teeth few, small, conical, in one series; gill-rakers 

 rather long; pharyngeals normal; scales small; dorsal spines low, 

 posteriorly subequal, much shorter than the soft rays; caudal deeply 

 forked ; anal basis elongate, the spines small. Vertebrae 14 + 22. 

 The genus differs from Ditrema chiefly in the development of the lips. 

 {pdy.o^, ragged ; ;f£fA«c, lip.) 



939. R. toxotes Agassiz. — Alfione. 



Olivaceous, with brassy reflections and dusky points ; fins plain ; body 

 ovate, with elevated back and long, thick caudal peduncle ; head deep, 

 with i)rominent snout; mouth wide, oblique; maxillary reaching front 

 of orbit, slipping under the preorbital; lips extremely large, with 

 uneven surface ; teeth strong, wide-set, those in mandible little devel- 

 oped ; eye large. Soft dorsal considerably elevated, much higher than 

 spinous portion; pectorals and ventrals long; caudal short, deeply 

 forked, the upper lobe the longer. Head 3f ; depth 2|. D. X, 23; A. 

 Ill, 30; Lat. 1. 76. L. 18 inches. The largest and least hand.some 

 of the family, and the one of most value as food. Coast of California ; 

 rathftr-common. 



(Agassiz, Am. Joiim. Sci. Arts, 1854, 367; Girard, U. S. Pac. R. R. Surv. Fish. 188: 

 Ditrema toxotes Gunther, iv, 247.) 



