A. M Verrill — North American Cephalojjods. 351 



Measurements of Rossia menaptera. {Continued.) 



Inches. Millimeters. 



Breadth of head, across eyes, 1-40 36 



Breadth of fios, antero-posteriorly, 1-08 27 



Length of fins, base to outer edge, -85 22 



Diameter of eyes, -75 19 



Diameter of larger suckers of lateral arms .. -06 I'S 



Diameter of larger suckers of club, ... -01 -25 



Breadth of club, -16 4 



Length of club, -95 24 



OiF tlie soutlierii const of Newfoundland, in 150 fathoms, Capt. K. 

 Marki^son and crew, schooner " Notice," June, 1880. 



This species is remarkable for the great size of the fins and eyes, and 

 for the length of the tentacular arras. It appears to be a species spec- 

 ially adapted for inhabiting greater depths than the species hitherto 

 discovered. It has the same soft, flabby integument observed in Octo- 

 pi(s lentus and StoKroteuthis syrtensis., found at similar depths. 

 But the looseness of the skin may be due in part to the condition of 

 the specimens when preserved. The suckers on the tentacular arms 

 are remarkably small. 



Rossia Hyatti Yerrill. 

 Yerrill, Amer. Journ. ScL, vol. xvi, p. 208, 1878. 



Tryon, Man. Conch., i. p. 160, 1879. (Description compiled from preceding). 

 Yerrill, Amer. Journ. Sci., xix, p. 291, pi. 15, figs. 1 and 2, April, 1880. 



Plate XXYII, figs. 8.9. Pl.a.te XXX, fig. 1. Plate XXXI, figs. 1, 2. Plate 



XLYI, fig. 5. 



Body subcylindrical, usually broader posteriorly ; in preserved 

 specimens, variable in form according to contraction. Dorsal sur- 

 face covered with small, conical, scattered, whitish papilloe, which are 

 also found on the upper and lateral surfaces of the head and bases of 

 the arms ; those around the eyes largest ; one on the mantle, in the 

 median line, near the front edge, is often elongated. Front border of 

 mantle sinuous, slightly advancing in the middle, above. P'ins moder- 

 ately large, nearly semicircular, attached from the posterior end for 

 about four-fifths the whole length, the front end having a small, round- 

 ed free lobe. The distance from the posterior junction of the fins to 

 end of body is less tlian that from the anterior junction to edge of 

 mantle, the center of the fin being at about the middle of the body. 

 Siphon elongated, conical, with a small opening. Head depressed, 

 more than half the length of the body. Eyes large, the lower eyelid 

 prominent, but not much thickened. Sessile arras short, united at 



