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PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. XXXIII. 



of ventrals; an elongated filament-like spinous ray on occiput, its tip 

 reaching to the back of the continuous spinous dorsal; spinous dorsal 

 not preceded by a short detached ray or finlet directly in front of its 

 base; spinous and soft dorsals of about equal height, wdth a strong 

 but short keel-like spine situated in the interval between them; ori- 

 gin of anal fin slightly nearer to base of caudal than to gill opening; 

 caudal lunate; pectorals elongated, their tips reaching base of caudal; 

 the long pectoral rays free at tip, somewhat filamentous; caudal 

 peduncle as long as head, depressed, and broad and flat above anteri- 

 orly; 3 pairs of enlarged keeled scales along ventro-caudal edge, the 

 first pair opposite middle of anal; base of caudal with an upper and 

 lower pair of similar enlarged scales; no lateral line. 



Pig. 9. — DAicocr.s peterseni. 



Color in alcohol yellowish brown, the back and top of head with 

 numerous roundish black spots, which are of smaller size than the 

 spots of Dactyloptena orientalis; belly dirty white, the scales bearing 

 considerable pigment in the form of fine punctulations; single rays 

 of spinous and soft dorsal of alternating light and dark color from 

 base to tip; pectoral membranes chiefly dark, but more or less 

 streaked and spotted with whitish; the rays mostly pale, but blotched 

 or banded at intervals with dusky. Life colors not recorded. 



Here described from a single specimen 1 1 inches long, taken at 

 Misaki. 



(Named by Nystrom for "J. V. Petersen i Japan.") 



