A. E. Verrill — JVorth American Cephalopods. 407 



suckers not well preserved, but all appear to have been alike in form; 

 pedicels long and slender, Avith a smooth and not very large swelling 

 below the base of the sticker; the suckers have lost their horny rims, 

 but the sheaths are shaped much like those of 0. lacertosa, the distal 

 portion being hood-shaped, with a lateral opening, while the basal part 

 is swollen laterally. The tip of the club is simple, without any such 

 spoon-shaped appendage as is found in the preceding species. Buccal 

 membrane large, with a free thin edge, which scarcely forms ano-les. 



Pen (PI. LV, fig. 3a) has a narrow, linear anterior portion, consist- 

 ing of more than halt' its length, decreasing in width backward, then 

 suddenly expanding into the posterior portion, which is broad and 

 thin, and infolded, so as to form a large, compressed posterior cavity; 

 the anterior portion is concave beneath, with no midrib, the edges 

 excnrved and slightly thickened; when spread out and flattened the 

 posterior portion has a lanceolate form, rather abruptly widenino- 

 anteriorly and very gradually tapering backward, with a double 

 midrib, and some delicate lines ])arallel to it, while the lateral expan- 

 sions are very thin and delicate. Color of body mostly destroyed, in 

 the typical specimens, but small, light purplish brown chromato- 

 phores are uniforndy scattered over the parts best preserved ; this 

 is also the case on the head, siphon, and outer surfaces of the arms, 

 where the skin is well preserved; scattered spots also occur on the 

 inner surfaces, between the suckers. 



A larger specimen ^station 994), which has lost its head and pen, 

 and, therefore, cannot be positively identified, has a much darker 

 color. It is dark purplish brown over the whole body. 



The male has the mantle 62""" long ; length of caudal fin, 31 ; 

 its breadth, 36 ; end of tail to base of arms, 85 ; length of dorsal 

 arms, 26 ; of second pair, 48 ; of third pair, 45 + (tips gone) ; of fourth 

 pair, 35 ; of tentacular arms, 118; of sucker-bearing portion of club, 

 16; breadth of tentacular arms, 2; of club, 4; of lateral arms, at 

 base, 3*5 ; of ventral arms, 3 ; diameter of eye-ball, 8 ; of the largest 

 suckers of lateral arms, 1*2; length of pen, 62 ; of anterior, narrow 

 portion, 38 ; its breadth anteriorly, where widest, 2 ; where narrow- 

 est, 1*25 ; length of posterior portion, 24 ; its bi-eadth, 8'""". 



The teeth of the odontophore (PI. LV, fig. 3b) form seven rows ; 

 the median ones have a large, acute central, and two small, lateral 

 denticles ; the inner lateral teeth have a large, acute, inner denticle 

 and a very small outer one; the next to the outer lateral teeth ai-e 

 somewhat stouter than the outermost, which are slender, strongly 

 curved, and very acute ; no marginal plates were observable. 



