596 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 



938. D. fiirratuiii (Grd.) Giinther. 



Light olivaceous, silvery below, sometimes yellowish; scales with 

 bright reflections, but no red markings ; 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 spine highest, sometimes higher than the soft rays, the fin 

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

 usually the longer. Head 33; depth 2; D. X, 24; A. Ill, 32; Lat. 1. 

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

 Mendocino southward. 



(Phanerodon furcatus Girard, Proc. Acad. Nat. Sci. Phila. 1854, 163, and in U. S. Pac. 

 R. R. Surv. Fish. 184; Giiuther, iv, 247.) 



313. RHACOCHILUS Agassiz. 

 (Agassiz, Am. Journ. Sci. Arts 1854, 367: type Ehacocliilus 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 frenurn, its posterior free edge 

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

 rather long ; pharyugeals 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 -f 22. 

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

 (/;*?, ragged ; -/^^, lip.) 



939. R. toxotes Agassiz. ^flfione. 



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

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

 with prominent 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, imieh higher than 

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

 forked, the upper lobe the longer. Head 3? ; depth L'r. D. X, 23; A. 

 Ill, 30; Lat. 1. 76. L. IS inches. The largest and least handsome 

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

 lather common. 



(Agassiz, Am. Joimi. Sci. Arts, 1854, 307; Girard, U. S. Pac. R. R. Surv. Fish. 188: 

 Ditrema toxotes Giiuther, iv, 247.) 



