816 CONTEIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 



cycloid, loosely imbricated; those of the blind side a little smaller; no 

 bony tubercles; vertical fins scaly. Anterior rays of dorsal elevated, 

 branched, with free tips. Head 3f ; depth If. T>. 65; A. 52; Lat. 1. 

 85. L. 18 inches. Atlantic coast of United States, very common north- 

 ward; size rather small. 



(Pleuronectes maculatus Mitch.. Rept. in Part Fish. N. Y. 1814, 9: Pleiironecfes aquosus 

 Mitch. Traus. Lit. & Phil. Soc. i, 3B9, 1815: Rhombus aquosus Gilnther, iv, 411 : Lophop- 

 setta maculata Gill, Proc. Acad. Nat. Sci. Phila. 1862, 216.) 



450.— CITHABICHTHYS Bleeker. 

 {Hemirhorribus Bleeker: Orthopsetta and Metoponops (j'iW.) 



(Bleeker, in Giinther, iv, 420, 1832, and in Compt. Rend. Acad. Sci. Amsterdam, xiii, 

 1862: type CWiaricMliijs cayennensis Bleeker.) 



Eyes and color on the left side. Body oblong ; mouth of the large type, 

 but comparatively small, with one or two series of small, sharp teeth in 

 each jaw ; no teeth on vomer or xjalatines. Gill-rakers moderate, slender. 

 Dorsal tin begiuning just in front of eye; all the fin rays simple; vent- 

 rals of colored side on the ridge of the abdomen ; no anal spine ; caudal 

 fin convex or double-truncate behind. Scales thin, slightly ctenoid. 

 Lateral line nearly straight, simple. Lower pharyngeals sei)arate, each 

 with a single row of teeth. {Citharus, an allied genus; IxOu?, fish — a 

 fish which lies on its xcOapoc; or ribs — that is, on its side.) 



a. Teeth in upper jaw in two rows. (Remirhombus* Bleeker.) • 

 b. Interorbital space broad ; left pectoral filamentous. 



1256. C araanaca (Cuv.) J. & G. 



Light-brown, with blackish blotches; fins mottled; left i^ectoral 

 barred. Body ellii)tic-ovate, the anterior profile regularly decurved, 

 forming an angle above the snout. Mouth rather large, arched ; max- 

 illary 2| in head, extending to below eye; teeth in upper jaw in two 

 series, some of the outer forming small canines ; lower teeth in one row. 

 Eye large, 4 in head ; lower eye in advance of upper, especially in the 

 adult; interorbital space broad, concave, as broad as eye in adult, much 

 narrower in the young. Gill-rakers short, flattish. Dorsal rather low, 

 the longest rays 2^ in head; anal without spine; pectoral of left side 

 with two filamentous rays, its length IJ to 2 times head. Scales small, 

 thin, weakly ciliate, with smaller ones intermingled. Head 3|; depth 



* Bleeker MSS. Gunther, Cat. Fish. Brit. Mus. iv, 423, 1862 : type Hemirhovibus 

 guineensis Bleck. {emi, half; po/ii/3o<^, Rhombus.) 



