90 DEEP SEA FISHES. 
process and spines well developed. Gills two, none on first and fourth 
arches. 
Type H. tumifrons. 
In the diagnosis of Halieutea, C. V., 1837, Hist. Poiss., XII., 457, 
Valenciennes does not mention the number of gills in the type species, 
Hi. stellata Wahl, 1797. Giinther, 1861, Cat., III, 205, had a number of 
specimens and on dissection found “gills two and a half, the anterior 
arcus branchialis not having any lamin.” Goode and Bean, 1896, also 
Jordan and Evermann, 1898, concur in attributing two and a half gills 
to the genus. It is evident that the dibranchiate species described here- 
with, though closely allied must be provided for elsewhere than in 
the genus founded by Cuvier, whence the reason for the existence of 
Halieutopsis. At various times Alcock has described species of Hali- 
eutza from the Andaman Sea and the Bay of Bengal; as he does not 
indicate the number of gills, it may be that some of them belong to the 
dibranchiates. 
Halieutopsis tumifrons sp. n. 
Plate XX V. 
Br. r. 6 D. 6-55 A.4; V.G:)P. 145 109, 
Halieutopsis tumifrons is more slender, longer in the caudal portion, 
has a smaller eye, and has the dorsal situated farther from the disk 
than is the case with Halieutea stellata Wahl. The outlines of disk are 
subcircular, indented at the snout, and the edges on the suboperculum 
and forward are considerably swollen, especially so below the eyes. Body 
and head united in a much depressed subcircular or subquadrangular 
disk, of less than half of the entire length, as broad as long, notched in 
front of the mouth, with less curvature at the sides, deepest below the 
orbits and gradually lessening in depth backward, thick and rounded 
on the edge from the mouth to the subopercular process, and grooved 
from the suborbital region backward to the middle of the disk. Head 
higher at the snout, slightly concave in front of the interorbital space, 
flattened backward, with a deep indentation below the rostrum at the 
jaws. Snout prominent, but not extending farther forward than the 
edges of the disk above the angles of the mouth, bluntly rounded in 
front, deeply excavated below the rostrum to permit retraction of the 
trilobed protractile illicium between the orbits, and with a wide deep 
