302 DEEP SEA FISHES. 
anterior below the level of the posterior, halfway from the eye to the end of 
the snout; posterior forward of the upper half of the eye, halfway from the 
anterior to the orbit. Gill openings small, not as wide as the eye, not 
reaching as high as the upper edge of the pectoral. Muscular segments one 
hundred and eighteen, plus about thirty-five behind the vent. 
Pectorals short, not reaching halfway to the eye, nearly as deep as loné. 
From the vent the caudal region is more acute or tapering than on A, den- 
tatus. The caudal rays are inserted on two basal pieces, each bearing five 
rays, the lower of the two being the shorter; fin pointed. 
Total length three and five sixteenths, length of head three sixteenths, 
length of caudal fin-one sixteenth, snout to vent three, and greatest depth 
—near the mid-length — three eighths inches. 
Translucent or transparent, muscular portions of the head more opaque. 
A group of four or five small spots of black lies below the preopercular and 
orbital regions; another group of about five lies below the operculum; a 
series of light-centred black spots extends along the median line of the 
flank from the head to the tail, each spot of which lies near the line at 
the groove separating the transverse bands of muscle; and another series, 
of a larger number of similar spots, extends along the upper edge of 
the intestine. The spots are like those of A. dentatus, Pl. LXVI., fig 3, and 
greatly resemble those of Scopeloids. These species are evidently closely 
allied, the adult forms no doubt being of a sifigle genus, but A. falcidens, 
has a larger eye, a shorter snout, more arch upon the crown, a narrower 
caudal region, and more segments in body and in tail, which suffice to dis- 
tinguish them. 
Station. Latitude. Longitude. Depth. Temperature. Bottom. 
3388 ioaGuaNte 79° 48/ W. 1168 fathoms 36.2° F. Gn. glob. Oz. 
Submarine townet, Time, March 9, 1891, 64 41™ a.m. 
Atopichthys acus sp. n. 
Plate LXVI. figs. 5, 5a. 
Much compressed, depth greatest behind the middle of the length, nearly 
one eleventh of the total, decreasing gradually forward and somewhat more 
rapidly backward. Head small, strongly compressed, little wider than the 
neck, narrower and sharp pointed at the snout; forehead narrow, slightly 
arched longitudinally, very convex transversely. Eye large; orbit as long 
