378 A. M Verrill — N'orth American Cephalopods. 



those of the third pair are about 12"'"' shorter tlian those of the 

 second ; the ventral pair about 6'""' shorter than those of the third. 

 In our type-specimen, all the arms on the right side are somewhat 

 shorter than those on the left, and the web between the first and 

 second arms is narrower, due, perha])S, to recovery from an injury. 

 The web between the arms, except ventrally, is of about equal width, 

 and scarcely more than one-fourth the length' of the arms, measuring 

 from the beak. Between the ventral arms the web is about half as 

 wide as between the lateral. 



The suckers are moderately large, decidedly prominent, alternating 

 in two regular rows, except close to the mouth, where a few stand 

 nearly iu a single line ; about fourteen to sixteen are situated on the 

 part of the arms included within the interbrachial web. The whole 

 number of suckers on one arm is upwards of seventy. 



Color of one alcoholic specimen is deep purplish brown, due to very 

 numerous crowded minute specks ; eye-lids, whitish. The front 

 border of the mantle, beneath, and the base of the siphon and adja- 

 cent parts are white; end of siphon, brown. Lower side of head and 

 arms lighter than the dorsal side. 



Total length, from posterior end of body to tip of arms, of 1st pair, 

 158"'"'; 2d pair, 160"'"'; 3d pair, 146"""; 4th pair, 133'""'; to web be- 

 tween dorsal arms, 82""" ; between ventral arms, 63'""' ; to edge of 

 mantle, beneath, 3(»"""; to center of eye, 39""", Breadth of body, 

 31"'™; of head across eyes, 30"'"'; breadth of arms, at base, 5-5"""; 

 diameter of largest suckers, 2-5"'"'; length of arms beyond web, 1st 

 pair, 76"'"'; 2d pair, 82"""; 3d pair, 71'""'; 4th pair, 69"'"'. 



Two specimens of this species, both females, have been obtained. 

 The first was from Le Have Bank, oif Nova Scotia, in 120 fathoms, 

 taken by Captain John Mclnnis and crew, of the schooner " M. H. 

 Perkins," October, 1879; the second was taken by Captain David 

 Campbell and crew, of the schooner "Admiral," (lot 590), near the 

 Grand Bank, N. lat. 44° 07' ; W. long. 52° 40', in 200 fathoms, De- 

 cember, 1879. 



This species resembles O. GrOnlandicus, of which only the males 

 appear to have been described, and it may eventually prove to be 

 the female of that species. 



This species is easily distinguished from 0. Bairdli^ by its more 

 elongated body, its much longer and more slender and tapered arras, 

 with shorter webs ; by the absence of the large, rough, pointed pa- 

 pilla, or cirrus, above the eye, and by its general smoothness. The 

 white color of the underside of the neck, siphon and mantle-box'der 

 also appears to be cliaracteristic. 



