ATOPICHTHYS OPHICHTHYS. 383 



as the snout, one tliird as long as the head ; iris black. Mouth largo, 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 in a 

 closely set series from the throat backward about one fourth of the length, 

 in 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. fakidens 

 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° C>2' 30" W. 1772 fathoms 35.8° F. Gu. M. Mar. 6, 8>' 38™ a. m. 



Atopichthys ophichthys sp. n. 



Plate LXVII. figs. 1, 1 a. 



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 



