FISHES OF HAWAIIAN ISLANDS. 
611 
Halosauropsis kauaiensis, new species. Plate 74.® 
Type, 655 mm. long, from station 4018, vicinity of Kauai Island, depth 724 to 804 fathoms; type 
No. 51612, U. S. Nat. Mus. 
Length of, head 40 hundredths of distance from tip of snout to vent; longitudinal diameter of 
orbit 5; interorbital width 6.5; preocular length of snout 16; preoral length of snout 4; length of 
maxillary 13; length of mandible 18; greatest depth of body 20; distance from tip of snout to front of 
dorsal 72; distance from tip of snout to base of ventrals 66; longest pectoral ray 21; longest ventral ray 
12. D. 11 (including rudimentary ray) ; V. 9; P. 14 or 15; enlarged scales between gill-opening and 
vent 22 to 25; about 35 to 40 scales in a median series from occiput to front of dorsal; branchiostegals 13; 
gill-rakers 5+18 on outer arch; pyloric caeca 9. 
Premaxillary band of teeth half length of maxillary band; teeth in both jaws large, arrow-shaped; 
palatine band tapering to a point anteriorly, and there separated by a very short interval from its 
fellow; at its posterior end, it is nearly as wide as the premaxillary band, and is separated from the 
narrower pterygoid band by about .4 its own length; pterygoid band extending far back into the 
mouth, and very narrow; tongue smooth; a wide band of teeth on the basibranchials; head scaleless, 
with the exception of the cheeks and a narrow strip above the opercles, which are covered with scales 
like those on body; vertex gently arched transversely. In adults the gill-rakers are short, the longest 
about .4 diameter of eye; in the young they are noticeably longer, more than half as long as eye; there 
are 5 or 6 on the vertical limb and 17 to 19 on horizontal limb of outer arch, including all rudiments. 
Origin of the dorsal slightly behind middle of ventral fin, its height a third greater than the 
length of its base; base of ventrals below eleventh scale of lateral line, and nearer head than vent by 
two-thirds its own length; its outer ray shortened. In adults the inner ventral rays show union at 
base only, but in younger individuals they are joined by membrane nearly to their tips. Pectorals 
long, 1.6 in head, and falling but little short of vertical from base of ventrals; height of longest anal 
rays equal to half length of snout and orbit. 
Scales of lateral line much enlarged. Photophores very narrow, vertically elliptical. v 
Color dark brown on back and sides, many of the scales with a light pearly spot at base; under 
parts, including snout, sides of head and subpectoral region and gill cavity, blue-black; ventrals blue- 
black; pectorals and dorsal dusky at base, whitish on terminal portion; anal dusky, lighter at base. 
Young specimens have a black vertebral band behind dorsal fin. 
Taken at the following stations: Nos. 3887, off the north coast of Molokai, 552 to 809 fathoms; 3977, 
vicinity of Bird Island, 876 to (?) fathoms; 3989, vicinity of Kauai, 385 to 500 fathoms; 4018, vicinity 
of Kauai, 724 to 804 fathoms; 4019, vicinity of Kauai, 409 to 550 fathoms. 
H. kauaiensis is most nearly related to 11. mediorostris (Gunther) from near the Philippine Islands, 
but the scales are much larger in the latter. 
Halosauropsis verticalis, new species. Plate 75. & 
Type, 295 mm. long, from station 4141, vicinity of Kauai, depth 437 to 632 fathoms; type, No. 
51645, U. S. Nat. Mus. 
Length of head 46 hundredths of distance from tip of snout to vent; longitudinal diameter of orbit 
8; interorbital width 6; preocular length of snout 20; preoral length of snout 7; length of maxillary 16; 
length of mandible 20; greatest depth 15; distance from tip of snout to front of dorsal 77; distance 
from tip of snout to base of ventrals 72; longest pectoral ray 28; longest ventral ray 13. D. 11 (includ- 
ing anterior rudiment); Y. 9; P.14; enlarged scales between vent and gill-opening 25; about 40 to 45 
scales on median line of back before dorsal fin; branchiostegal rays 12; gill-rakers 6+18 on outer arch, 
the longest two-thirds diameter of eye; pyloric caeca 9. 
The greatest depth is at occiput, one-third length of head; snout longer than in H. kauaiensis; hori- 
zontal diameter of eye slightly exceeding interorbital width, equal to .3 the postocular part of the head 
(J in kauaiensis of equal size, in which it exceeds interorbital width by .2 its length); occiput deeply 
concave, sending forward a narrow concave groove which tapers to a point and thus terminates 
slightly in front of nostrils; outlines of the brain very conspicuously marked on the occiput; maxillary 
extending slightly beyond anterior margin of orbit; premaxillary constituting slightly less than .4 of 
the dentary surface of the upper jaw; teeth distinctly arrow-shaped, constricted at a point below tip, 
then broadened ; palatine bands with a straight inner and a convex outer margin, tapering from the 
a Aldrovandia kauaiensis on plate, by error. b Aldrovandia verticalis on plate; by error. 
