PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 363 



the ends, the length of the arms decreasing from the dorsal to the ventral 

 ones ; suckers sessile, simj)le, in two rows ; mantle united firmly to the 

 head by a broad dorsal band and by a ventral and two lateral commis- 

 sures, the former placed in the median line, at the ba^e of the siphon 5 

 free end of the siphon short, well forward. In the male the right arm 

 of the third pair is hectocotylized and developed in a sack in front of the 

 right eye; as found in the sack it is curled up and has two rows of 

 suckers; the groove along its edge is fringed; near the end the groove 

 connects with a rounded, obliquely placed, lateral, concave lobe, with 

 interior plications. The terminal portion of the arm is a lanceolate 

 thickened process, with ridges on the inner surface. 



The permanent attachment of the mantle and neck, by means of com- 

 missures, is a very distinctive character. 



Alloposus mollis YerriU. 

 Loc. cit., p. 394. 



Body stout, ovate, very soft and flabby. Head large, as broad as the 

 body ; eyes large, their openings small. Arms rather stout, not very 

 long, webbed nearly to the ends, the dorsal 60""° longer than the ventral 

 arms ; suckers large, simple, in two alternating rows. Color deep pur- 

 plish brown, with a more or less distinctly spotted appearance. Length, 

 total, 160""°; of body to base of arms, 90™""; of mantle, beneath, SO"""; 

 of dorsal arms, 70"""; breadth of body, 70'""'. Seven specimens were 

 taken. The sexes scarcely differ in size. Station 880, in 225 fathoms 

 (2 (^ , 1 9 ) ; 892, 487 fathoms; 893, 372 fathoms; 895, 238 fathoms. 



Argonauta Argo Linn6. 



The capture of a living specimen, probably of this species, on the coast 

 of New Jersey, has been recorded by Eev. Samuel Lockwood.* It was, 

 nevertheless, very surprising to us to find its shells, or fragments of 

 them, very common in nearly all our deeper dredgings, 70 to 100 miles 

 off the southern coast of New England. At station 894 two entire and 

 nearly fresh shells were taken, and another nearly complete. They be- 

 long to the common Mediterranean variety. 



GASTEOPODA. 



Bela (Leach) H. & A, Adams ; G. O. Sars, &c. 



Pleurotoma (pars) Jeffreys and many earlier authors. 



The species of this genus are numerous on our coast, but their identi- 

 fication is difficult, owing to the very poor and insufficient descriptions 

 of many European writers.! Moller's Greenland species, especially, are 



*Amer. Naturalist, xi, p. 243, 1877. 



t In Binney's edition of Gould's Invert, of Mass. there are included seven northern 

 species of Bela. Of these the figures are mostly inadequate, and some are entirely 

 erroneous. Fig. 620, given for B. iurricula; Fig. 621, intended for B. harpularia ; and 

 Fig. 624, for B. cancellata, do not really represent those species. Fig. 620 represents 

 B. harpularia better than *'B. turricula", for which it was intended. 



