

No. 1838. SOME NEW PACIFIC CEPHALOPODA— BERRY. 591 



Color very pale over the body; arms and umbrella darker. 



Type.— Cat. No. 214322, U.S.N.M. From Albatross station 4293, 

 Shelikof Strait, Alaska. 



Length (total) 210 mm.; posterior tip of body to base of dorsal 

 arms 45 mm. 



ROSSIA PACIFICA, new species. 



Body moderately small, sepioliform, with large subcordate lateral 

 fins. 



Head large; arms stout and rather short, the order of length 3, 4, 

 2, 1; umbrella rudimentary; suckers spherical, oblique, in two rows 

 at the base and tip of all the arms, but often extremely crowded along 

 the middle where they are apparently ranked in three or even four 

 rows. Both dorsal arms in the male hectocotjdized, strongly recurved, 

 their suckers greatly reduced, usually in two rows until just before 

 reaching the tip, when they become more crowded; the bases of the 

 suckers transversely compressed to form a series of rugose folds. 

 Tentacles variable in size and proportion, the club but slightly 

 expanded; at the middle with about eight rows of small delicately 

 toothed suckers. 



Type.—G&t. No. 214323, U.S.N.M. From Albatross station 4233, 

 Behm Canal, Alaska. 



Length (total) 74 mm. ; length of mantle (dorsal) 32 mm. 



This species is nearly allied to R. macrosoma Delle Chiaje but appears 

 to differ in a number of small details. 



LOLIGO OPALESCENS, new species. 



Body of moderate size, elongate, slightly swollen near the middle, 

 thence tapering acutely to a rather sharp point; fins large, sagittate, 

 about half as long as the mantle; mantle margin produced above into 

 a prominent squarish rostrum. 



Head small, square; eyes large. 



Arms stout and rather short, unequal, the dorsal arms considerably 

 the shortest; umbrella rudimentary, but keels and swimming mem- 

 branes well developed, especially on the third arms where the ventral 

 membrane becomes wider than the arm itself. Suckers small, notched 

 above, regularly alternating in two rows; horny rings with 9 to 12 

 bluntly rounded squarish teeth. Left ventral arm of the male con- 

 spicuously hectocotjdized; along the proximal two-thirds of the arm 

 the suckers are unmodified, but along the distal third their pedicels 

 become greatly elongate and transversely flattened; also the cupules 

 undergo great reduction although persisting to the tips, those of the 

 dorsal row bemg the most modified. 



Tentacular club slightly expanded, with two lateral rows of small 

 suckers and two median rows of large ones, the horny rings of the latter 

 armed all round with about thirty-five small, rather elongate, bluntly 

 conical teeth. 



