ATOPICHTHYS OPHICHTHYS. 333 
as the snout, one third as long as the head; iris black. Mouth large, ex- 
tending below the forward part of the eye; mandibular angle below the 
middle of the orbit. Teeth sectorial, comparatively large, acicular, long, 
very sharp, compressed and widening toward the bases, with a slight ridge 
down the outside of the larger, somewhat inclined toward the end of the 
snout. An anterior pair of large canines in each series, separated from the 
other teeth by a wider interspace. Upper teeth more erect. Nostrils very 
small, situated much above the lip, distant from the end of the snout, pos- 
terior near the eye anterior a short distance farther forward. Gill openings 
small, oblique, as wide as the eye, in front of the bases of the pectorals. 
Vent in a prominence at the caudal fin, There are one hundred and 
twenty-seven muscle-bands forward of the vent and only eight between it 
and the caudal. 
Pectorals small, about as broad as long, short, hardly half as long as the 
eye. Caudal ending in an angle of less than ninety degrees. 
Translucent or transparent; pigment arranged in very small dots ina 
closely set series from the throat backward about one fourth of the length, 
m one to two series on the median line of the back to the caudal fin, in 
short close series, of four to thirty each, in each groove between the muscle- 
bands from the median line of the flank downward on the side, and in a 
series on the base of the caudal around the bases of the rays. The spots 
along the intestine have the structure of those on A. dentatus, A. falcidens 
and others and are presumably luminous organs; they have the black spot 
with a black centre surrounded by a silvery ring. The spots on the flank 
do not show the silver color and may be non-luminous. 
Total length six and three fourths, depth five eighths, length of the head 
three sixteenths and snout to vent six and nine sixteenths inches. 
Station. Latitude. Longitude. Depth. Temperature. Bottom. Time. 
3381 4°56’ N. 80° 52’ 30” W. 1772 fathoms 35.8° F. Gn. M. Mar. 6, 85 38™ a. M. 
Atopichthys ophichthys sp. n. 
Plate LX VII. figs. 1, La. 
Body narrow and deep, deepest portion at a short distance behind the 
vent one eighth of the entire length, outlines above and below converging 
with some regularity toward the blunt extremity of the tail but remaining 
