ATOPICHTHYS FALCIDENS. 331 
several dots at each side; a more or less irregular series of spots, probably 
luminous, at each side of the intestine ; a series of larger luminous spots, 
somewhat irregularly placed and spaced, close to the median line of thie 
flank, each spot of which is situated on the hinder edge of the muscular 
segment at the groove between it and the next segment. Forward, a 
number of the segments here and there are without spots in the median 
series; behind the mid-length the series is more regular. On and near 
their bases the rays of anal and caudal bear very small streaks of black. 
Total length three and four tenths, head two tenths, depth four tenths, 
at the mid-length, and snout to vent three inches. 
Compared with A. falcidens the species here described has a smaller eye, 
a longer snout, a straighter crown, a wider caudal region and a smaller 
number of segments in body and in tail. 
Station, 3375 ; Lat., 2° 34’ N.; Lon., 82° 29’ W.; Surface townet, over a depth of 1201 fathoms with 
a bottom of Gy. glob. Oz., with a Temp. of 36.6° F.; Time, 64 26™ a. m., March 4, 1891. 
Atopichthys falcidens sp. n. 
Plate LXVT. figs. 4,44. 
Comparatively short and very narrow; greatest depth, in the anterior 
half, about one ninth of the total length, caudal region tapering regularly 
along the bases of the fins: Head nearly one eighteenth of the entire 
length, upper longitudinal outline arched over the orbit and slightly concave 
above the nostrils, lower outline convex in the mandibles, width greater than 
that of the body, convex across the crown, tapering from the nape, acute at 
the snout. Snout sharp, narrow, compressed or roof-shaped across the top, 
little longer than the eye. Eye large, nearly one third as long as the head ; 
iris silvery, deeper than long, narrowed below. Mouth large, cleft nearly 
underreaching the forward half of the eye; prominence of the angular 
close to a vertical from the hind border of the orbit; lower jaw little if any 
longer. Teeth large, sectorial, compressed, slender, acuminate, inclined for- 
ward, with a rather distinct ridge along the outer side. One or two small 
teeth in front on each jaw, separating a pair of large falciform canines, are 
subconical. The canines are separated from the backward teeth by a wider 
interspace. Behind the eighth or ninth tooth of the upper jaw, backward 
of the posterior nostril, the teeth abruptly become much smaller and closer 
together. The upper teeth pass outside of the lower. Nostrils medium ; 
