396 Mr. A. Alcock on the Bathybial Fishes 
Diameter of the eye 34 in the head-length, much exceeding the 
width of the flattened interorbital space. Nostrils large, con- 
tiguous. Mouth inferior; the maxilla reaches the vertical 
from the middle of the orbit. Villiform teeth in the jaws, 
the outer row in the upper jaw enlarged. Barbel about as 
long as the eye. Opercular region square, very deep and 
broad. Guill-openings wide, the membranes united only in 
front. Gull-lamine very broad. Scales rather deciduous and 
uniformly minute, each with about seven short, longitudinal, 
parallel series of spinelets, the last in each series projecting 
well beyond the edge of the scale. Hight rows of scales 
between the first dorsal fin and the lateral line. Second 
dorsal separated from the first by an interval equal to the 
length of the latter’s base. Second dorsal spine with large 
semirecumbent distant barbs. First ventral ray produced 
into a filament longer than the fin. 
Colours in life:— Body dull grey; abdomen  slate- 
coloured ; sides of head and lower jaw silvery ; operculum 
violet-black ; dorsal fin black, with white root and tip” (Dr. 
G. M. Giles). 
Two specimens, 54 and 6% inches long respectively, both 
much damaged. 
Hab. Bay of Bengal, lat. 20° 17! 30" N., long. 88° 51' E., 
in 193 fathoms, and lat. 19° 35’ N., long. 92° 24’ H., in 272 
fathoms. 
Subgenus Mysraconurus, Gthr. 
Macrurus heterolepis, sp. nov. 
Be Doll Acerca 100: . Pits Ve dOl 
Head much exceeding the trunk in all three dimensions, 
its mucous-cavities and its bony ridges, except the infra- 
orbital, well developed. The short trunk falls abruptly to the 
long filiform tail. Snout truncated, much shorter than the 
eye, hardly overlapping the upper jaw. Diameter of the eye 
33 in the head-length and less than the width of the inter- 
orbital space. Mouth wide, hardly inferior, its cleft reaching 
the vertical from the middle of the orbit. Jaws slender. A 
ciliiform barbel about half as long as the eye. ‘Teeth in both 
jaws in a narrow villiform band, Gill-cleft wide ; the mem- 
branes united only quite anteriorly. Giull-laminz very narrow. 
Integument thin. Head scaleless. Body covered with very 
thin and deciduous scales of two forms, those immediately 
behind the head being large and perfectly smooth, those on 
