A. E. Verrill — IVort/i American Cephalopods. 383 



the middle, narrowed bat little forward, but decidedly tapered, back of 

 the fins, to the flat, obtuse, or subtruncate tail. The sides of the 

 head and of the body, forward of the fins, are bordered by a thin 

 soft membrane, about 12'"'" wide. The fins are elongated, sub-tri- 

 angulai', obtusely pointed, placed in advance of the middle of the 

 body ; supported by internal cartilages, which imite with a trans- 

 verse dorsal V-shaped one, situated behind the fins. Siphon elonga- 

 ted (about 12"""), slendei', round, with a small terminal opening. 

 Mantle edge is contracted and thickened around the base of the siphon 

 so as to show only a very small opening, and is united to its ante- 

 rior or dorsal commissural band. Eyes large, distinctly visible 

 through the integument. Arms long, slender, sub-equal, each united 

 to the great web by a broad membrane developed on its outer side, 

 widest (about 38""" or 1*5 inches) in the middle of the arm, while the 

 edge of the web unites directly to the sides of the arms and runs 

 along the free portion toward the very slender tip, as a border. 

 This arrangement gives a swollen or campanulate form to the 

 extended web. Edges of the web incurved between the arms, widest 

 between the two lateral pairs of arms. The arms bear each fifty- 

 five or more suckers, in a single row. Those in the middle region 

 are wide-apart (12'""' or more), w^ith a pair of slender, thread-like 

 cirri, about 25 to 32""" long, midway between them. The cirri com- 

 mence, in a rudimentary form, between the 5th and 6th suckers, on 

 the dorsal arms, and between the 7th and 8th, on the lateral and 

 ventral ones. They cease before the 23d sucker on the dorsal and 

 lateral arms, and before the 22d on the ventral ones, which bear each 

 14 pairs of cirri. Near the mouth, and beyond the last cirri, on the free 

 portion of the arms, the suckers are more closely arranged. The jaws 

 are small, with a deep cavity. Beyond the last cirri, on the dorsal 

 arms, there are 33 to 35 small suckers. The 2d arm on the right 

 side appears to be imperfect. On this arm there are but 19 suckers 

 beyond the last cirri ; then follow minute, wart-like tubercles, extend- 

 ing to the tip. Color, in alcohol, generally pale with irregular mot- 

 tlings and streaks of dull brownish ; inner surface of arms and web, 

 toward the base, and membrane around the mouth, deep purplish 

 brown. Length from end of body to base of arms, 160"""; length 

 to posterior base of fins, 63'""' ; to anterior base, lOl'""' ; width across 

 fins, 126'""'; in advance of fins, 53'"'" (not including lateral mem- 

 brane) ; across eyes, 44""" ; across end of tail, 30"'"' ; diameter of 

 eye, 25'"'"; width of fins, at base, 33'""'; their length, 44'"'"; length 

 of arms, 330""" to 355""" ; portion beyond web, 63 to 76'"'". Edge 

 of extended web, between upper arms, about 101""" ; between lateral 



