FISHES OF HAWAIIAN ISLANDS. 
695 
Family OGCOCEPHALID^. 
Malthopsis mitrig-era Gilbert & Cramer. 
Fifty-two specimens were taken at 13 stations, the depth ranging usually from 250 to 300 fathoms. 
Median portions of breast and belly as fully plated as the back; antero-lateral margin of disk 
furnished with 2 series of plates separated by a shallow groove; below these, posteriorly, a third series 
which runs from angle to point opposite posterior margin of orbit, where it turns abruptly mesad and 
joins its fellow across middle of breast; the naked space containing anal opening surrounded anteriorly 
and laterally by 2 parallel series of plates, the outer of these crossing median line immediately behind 
ventral fins, and continued laterally along posterior lower margin of. arm; breast with 2 large plates on 
middle line, and a series of plates on either side which pass between bases of ventrals and diverge 
anteriorly; upper half of eye above pupil covered with small plates with radiating ridges, the lower 
series of these larger and centrally elevated; vomerine teeth minute, forming a moderate transverse 
band; separated from this band by a narrow line, on each side, is a small round palatine patch much 
less than half size of vomerine patch; tongue covered with retrorse teeth; longitudinal diameter of 
orbit two-fifths its distance from gill-opening; anterior nostril in a short tube, rather widely separated 
from posterior, which is a small roundish pore; when extended, the pectorals fail to reach tip of sub- 
opercular spine; ventrals not nearly reaching margin of disk; no functional gills on first or fourth arches. 
Our specimens range in length from 33 to 80 mm. The younger individuals differ in no essential 
features from the adults. 
In the Zoological Record for 1896, Yol. XXXIII, Pisces, page 22, Gilbert and Cramer are erroneously 
credited with establishing Mcilthopsis as a new genus for the reception of the present species. This 
error is repeated in the Index Zoologicus, 1902, page 211. A glance at the original description of 
Malthopsis mitrigera shows that it is proposed as a new species of AlcOck’s genus Malthopsis, to which 
it belongs. “ Malthopsis Gilbert and Cramer” does not exist. 
Specimens were taken at the following stations: Nos. 3839/off the south coast of Molokai, 259 to 
266 fathoms; 3865, Pailolo Channel, 256 to 283 fathoms; 3867, Pailolo Channel, 284 to 290 fathoms; 
3883, Pailolo Channel, 277 to 284 fathoms; 3914, off the south coast of Oahu, 289 to 292 fathoms; 3917, 
off the south coast of Oahu, 294 to 330 fathoms; 3918, off the south coast of Oahu, 257 to 294 fathoms; 
4096, northeast approach to Pailolo Channel, 272 to 286 fathoms; 4097, northeast approach to Pailolo 
Channel, 286 to — fathoms; 4117, off the northeast coast of Oahu, 253 to 282 fathoms; 4122, off the 
southwest coast of Oahu, 192 to 352 fathoms; 4130, vicinity of Kauai, 283 to 309 fathoms; 4132, vicinity 
of Kauai, 257 to 312 fathoms. 
Malthopsis mitriger Gilbert & Cramer, Proc. U. S. Nat. Mus„ XIX, 1897, 434, pi. XLvm, figs. 1, 2. 
Malthopsis jordani, new species. Plate 100. 
Type, 85 mm. long, from station 3853, off the south coast of Molokai, depth 115 to 134 fathoms; 
type, No. 51625, U. S. Nat. Mus. 
Length of disk, excluding pectoral basis, 52 hundredths of total length without caudal; greatest 
width of disk 60; length of caudal peduncle, from vent, 46; greatest width of caudal peduncle 17; dis- 
tance from vent to front of anal 25; diameter of eye 12; interorbital width 4.5; width of mouth, 
between tips of maxillaries, 11; length of caudal 25; longest pectoral ray 20; longest ventral lay 19. 
D. 6; A. 4; P. 13y Y. i, 5. 
Interorbital space gently concave, very narrow anteriorly; upper orbital rim bearing a blunt tubercle 
above posterior margin, a smaller one above middle of orbit, and 2, rather indistinct, anteriorly at 
base of rostral process; rostral process robust, directed vertically upward, its anterior mai'gin descending 
without notch or other interruption to a point below middle of orbit; rostral tentacle robust, short, 
not reaching margin of premaxillaries when laid forward; no narrowed stem can be distinguished 
below the thick oblong end or lure; mouth very narrow; a narrow band of minute teeth in front of 
lower jaw, with a much wider band of cardiform teeth behind it; premaxillary band narrower; entire 
surface of tongue beset with coarse teeth directed backward; a broad roundish patch of teeth on 
vomer, with an oval palatine patch on either side, separated only by narrow lines; palatine patches 
nearly as large as vomerine patch; anterior nostril with a reflexed margin but no tube, closely adja- 
cent to posterior nostril, which is a long transverse slit; two double gills on each side, the anterior 
gill-arch very short, provided with a few spinous rakers, but without gill-filaments, the position of the 
