596 CONTEIBUTIONS TO NOETH AMEEICAN ICHTHYOLOGY IV. 
93§. D. fwrcatJim (Grd.) Guntlier. 
Light olivaceous, silvery below, sometimes yellowish; scales with 
bright reflections, but no red markings ; usually a round dusky spot 
on the anal ; ventrals plain ; eaudal fin edged behind with dusky ; fins 
usually yellowish tinged. Body oblong elliptieal, compressed, tapering 
backward into the long and slender eaudal 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. Ilead 3| ; depth 2^- ; D. X, 24 ; A. Ill, 32 ; Lat. 1. 
G6. L. 1 foot. Coast of California; extremely abundant from Cape 
]\Iendocino southward. 
(Phanerodon furcatus Girard, Proc. Acad. Nat. Sci. Phila. 1854, 163, aud in U. S. Pac. 
E. E. Surv. Fish. 184; Giiuther, iv, 247.) 
313.— RHACOCeiLUS Agassiz. 
(Agassiz, Am. Joiirn. Sci. Arts 1854, 367: type Ehacoclulus 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 freuum, 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 difiers from Ditrema chiefly in the development of the lips. 
{pdxoi;^ ragged; 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 ijrominent 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- 
oi^ed; 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 2f-. 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 ; 
rather common. 
(Agassiz, Am. Jonrn. Sci. Arts, 1854, 367 ; Girard, U. S. Pac. E. E. Surv. Fish. 188: 
Ditrema toxotes Giiuther, iv, 247.) 
