488 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
Color in alcohol, dirty yellowish or olivaceous above; middle of side with an oblong dark or 
blackish area; ventral surface yellowish. 
Closely related to the East Indian species 0. diaphanus Bloch & Schneider, from which it is readily 
distinguished by the entire, absence of median spines on the lateral ventral keel, by the longer and 
straighter frontal and ventral spines, the character of dorsal spine, and the opaque carapace. 
A single specimen was obtained by me in 1889. It is 1.3 inches in total length and is taken as 
the type, No. 50717, U. S. N. M. The specimens recorded from Laysan and Hawaii by Steindachner 
probably belong to this species. 
Ostracion dicip/ianus Steindachner, Denks. Ak. Wiss. Wien, lxx, 1900, 517 (Laysan and Hawaii); probably not of 
LacApede. 
Family XLVII. DIODQNTM. 
214. Diodon nudifrons Jenkins, new species. 
I). 15 ; A. 12; forehead sloping upward from snout at angle of about 45°; interorbital 1.3 in head; 
spines mostly" short, not longer than eye, except those back of pectoral, the longest of which are equal 
to length of pectoral and about 2 in head; no spines on forehead below level of upper margins of eyes; 
foremost spines of head few and short; head, back, sides, all the tins and the membranous sheaths of 
the spines closely covered with small, roundish, black spots, much smaller than pupil; below pale; a 
