86 DEEP SEA FISHES. 
paddle-shaped, the fin being placed on the upper edge of the end of the 
lower bone, and reaching to the middle of the entire length of the anal. 
Ventrals small, narrower toward their bases, apparently four-rayed, but 
actually possessing two rays in rudimentary condition, bound to the outer 
pair. 
Color of the fresh specimen a deep rose, tinted with blue to blackish 
around the angles of the mouth and on the orbit around the eye (Plate C.). 
Color of alcoholic specimens uniform whitish externally and in the mouth ; 
abdominal cavity lined with black. 
Total length of the described individual ten and one-half inches. 
Station, Latitude, Longitude. Depth. Temperature, Bottom, 
3363 5° 43’ N. 85° 50! W. 978 fathoms 37.5° F, Wh. glob. oz. 
ONCOCEPHALID. 
Oncocephalus porrectus sp. n. 
Br. T.6.5 D53=4; Asa eV 4 129: 
Similar in shape to O. vespertilio Linn., but with longer rostrum and 
different coloration. The blotch at each side of the forward end of the 
vertebral column on the back is dark and commonly has a lighter centre, 
whereas on Linné’s species the blotch is made up of a number of rounded 
light edged closely placed blackish spots. The rostral prolongation is much 
shorter than that of O. longirostris C. V.; in fact it forms an intermediate 
between that species and O. vespertilio, in this respect. 
Disk subtriangular, in width equal to the length of the head or three 
times the depth; sides inclined, deepest at the head; caudal region sub- 
triangular in cross section, flattened on the lower surface, with a blunt 
dermal keel at each edge, rounded across the top, tapering from the disk 
but narrowing more abruptly a short distance forward of the caudal fin. 
Skull from end of snout to nape half as long as the disk ; forehead flattened, 
or slightly concave between the orbits. Rostrum acute, strong, round in a 
transverse section, in length equal to the width of the skull, deeply ex- 
cavated on the lower side for the lodgment of the protractile illicium, 
Illicial bulbs higher than wide, the two lateral rounded, the median 
(upper) triangular and pointed at the top, all moved forward and downward 
when in function. Possibly the bulbs in this species, and in most other 
Halieutoids, are invisible when withdrawn to the niche and presenting their 
