REGAN—MARINE FISHES. 239 
127. Platycephalus grandisquamis, sp. n. 
Depth of body 5} in the length, length of head 23. Snout a little shorter than eye, 
the diameter of which is 3 in the length of head and 4 times the interorbital width. 
Maxillary extending to below anterior § of eye; vomerine teeth in 2 separate patches. 
Head with several spines; 2 on the snout, 1 or 2 in front of each orbit; supraorbital 
ridges serrated except anteriorly; behind them on each side a more or less regular 
transverse series of 3 or 4 spines, which are followed by a larger spine on each parietal, 
with a small one behind it; a serrated ridge behind the middle of each orbit ; a series of 
3 post-temporal spines ; suborbital ridge serrated throughout, ending in a preeopercular 
spine of moderate length, below which are two others. Two opercular spines and one 
on the clavicle. 4 gill-rakers on the lower part of the anterior arch. 30 scales in a 
longitudinal series; only the anterior 3 or 4 scales of the lateral line spinate. Dorsal 
IX,110. Analll. Ventrals extending to the fourth anal ray. Caudal subtruncate. 
Brownish, with dusky bars or marblings; pectoral blackish posteriorly in its lower half ; 
ventral with 2 blackish cross-bars, one near its tip. 
Seychelles Group, Amirante, 30 fathoms. 
A single specimen, 73 mm. in total length. 
The three preceding species are allied to the Japanese P. spinosus, Schleg., and 
P. macrolepis, Biky., and differ from others of the genus in the large size of the scales. 
Hoplichthyide. 
128. Hoplichthys acanthopleurus, sp.u. (Plate 28, fig. 5.) 
Length of head 33 to 3} in that of the fish. Snout slightly longer than eye. the 
diameter of which is 33 in the length of head. Interorbital region very narrow, bordered 
by denticulated ridges, all the ridges on the head denticulated. Maxillary extending to 
below anterior margin of eye ora little beyond. 12 gill-rakers on the lower part of 
the anterior arch. 27 scutes in a longitudinal series; each scute with a well-developed 
spine and a second very small spine below it. Dorsal VI, 15; spinous dorsal scarcely 
higher in the male than in the female, the spines not produced; second dorsal, in the 
male, with ali the rays produced into filaments, increasing in length from the first to the 
third, which is nearly as long as the head, thence decreasing to the fifth and again 
increasing to the seventh and eighth, which are as long as the third, thence decreasing 
to the tenth, and again from the twelfth to the last. Anal 17. Caudal truncate. 
Saya de Malha Bank, over 123 fathoms. 
Two specimens, ¢ & ?, 180 mm. in total length. 
This species is very near to the recently described H. citrinus, Gilbert, from the 
Sandwich Islands, males of which have the first dorsal spine produced and filamentous, 
and only the four anterior rays of the second dorsal produced into filaments. 
The name Hoplichthys gilberti may be given to the species described from Japan by 
Gilbert as H. langsdorfii, C. & V., and which differs from H. citrinus in having none of 
the rays produced in the males. I have examined several specimens of the true 
H. langsdorfii, in which each lateral scute bears two strong subequal spines. 
