A. E. Vei'rill — 3Iollusca of the Neiii England Coast. 403 



angular, median lobe; at the eyes the lateral margin recedes in a 

 broad curve, but projects forward in an angular point below each 

 eye, while the ventral portion is cut away in a broad curve, so as to 

 expose the tip of the siphon. The head is short, broad, swollen 

 laterally, owing to the large size of the eyes, which are furnished 

 with free lids, having a small angular sinus in front. The siphon is 

 short and broad, with a smooth, shallow cavity behind it, without 

 any distinct bridles ; within, it has a well-developed valve. 



The arms are^mall and short, the ventral ones largest and longest ; 

 the two lateral pairs are nearly equal ; the dorsal pair decidedly the 

 shortest and smallest. The arms are united at the base by a rudi- 

 mentary web ; they are somewhat angular at base and taper some- 

 Avhat rapidly to slender tips ; the inner surface is thickly covered 

 with very small suckers, which appear to form about four irregular 

 rows. The lateral arms have a narrow, membranous keel along the 

 outer side, and all have narrow marginal membranes along the sucker- 

 bearing surface. The tentacular arms are very long and slender, 

 many times the length of the sessile arms, but more slender ; they are 

 rounded and of nearly uniform size throughout ; the sucker-bearing 

 portion is neither expanded into a club nor distinctly flattened, but 

 bears a large number of very minute suckers arranged in many rows 

 along the inner surface, the number of rows diminishing proximally. 



Color, in alcohol, dark reddish brown over the entire surface of the 

 body, head, and sessile arms, with the tentacular arms yellowish 

 white. The color is due to very numerous and densely crowded 

 chromatophores of rather lai'ge size. The color is most intense on 

 the upper surfaces of the head and sessile arms ; the lower side of the 

 body is somewhat paler than the upper side. The eyeballs outside 

 of the pupil are dull blue. 



Length of a female specimen, from the posterior end to the anterior 

 dorsal edge of the mantle, 57"'""; from the posterior end of the body 

 to the anterior insertion of fins, 9'^"" ; to the posterior insertion, 2-5""" ; 

 length of fin, 7"™; breadth across both fins, about 26™'"; breadth 

 across mantle anteriorly, 21'"™ ; length of head from dorsal cartilage 

 to base of dorsal arms, 17°^™; from anterior edge of mantle to base 

 of dorsal arms, S'"'^ ; length of dorsal arms, 20°"" ; length of second 

 pair, 23'"'" ; length of third pair, 23°^"' ; length of ventral arms, 25'""' ; 

 length of tentacular arms, 85""" ; greatest diameter, 2""^ ; length of 

 sucker-bearing portion, 13"^"'; its diameter, about 1"'"'. 



Off Martha's Vineyard, at stations 2189 and 2205, in 600 and 

 1,073 fathoms (Nos. 39,967 and 39,968). 



