1898-1902. No. 20.] BRACHIOPODS AND MOLLUSCS. 35 



Cephalopoda. 



Rossia palpebrosa, OWEN. 



(Fig. 9, a-6), 

 Locality: 



Aug. 1. 1900. Bank at the entrance to Stordalen, Havnefjord, 8 m. Small stones. 

 One specimen. 



The specimen, a female, has a total length of 30 mm. from the 

 posterior end of the body to the base of the arms. Length of 1st pair 

 of arms 26.5 mm. Umbrella is between 1st pair of arms 7 mm. high: 

 its proportion to the length of the arms is thus 1 : 3.8. Between 4th pair 

 of arms there is no web. Greatest breadth of body 18 mm. Breadth 

 of head over eyes 17 mm. The head is thus only slightly narrower 

 than the body. Length of body on the dorsal side 22 mm., on the 

 ventral side 19 mm. Maximum length of fins 13 mm., length at base 

 10 mm., maximum breadth 12 mm. Length of fins is thus 59 / of 

 the length of body. 



Body is posteriorly broadly rounded. On the dorsal side the 

 mantle-edge forms a very obtuse angle, on the ventral side it is 

 slightly incised. The well-developed siphon extends to the base of the 

 4th pair of arms. Eyes not very prominent. Dorsal side of head and 

 mantle are quite without papillae. Arms may be ranked in the follow- 

 ing order according to length: 3, 4, 2, 1. Arm-suckers are arranged 

 in two rows, though towards the tip they increase to apparently four 

 rows. On the tentacular club the suckers are apparently six-rowed. 

 Upper-row suckers of the base of the club are of about the same size 

 as in the lower rows. Dorsal surface of mantle sac smooth and without 

 papillae. Colour of the specimen preserved in alcohol is light whitish- 

 red on the dorsal side with numerous dark chromatophores or spots. 

 On the ventral side it is whitish with a few scattered dark spots. 



The specimen belong to the group palpebrosa glaucopis and may 

 perhaps most properly be referred to rossia palpebrosa which OWEN 

 has described. For on the dorsal side of the mantles sac we do not 

 find the small whitish papillae that are so characteristic of the typical 

 rossia glaucopis, LOVEN. An additional reason for referring the speci- 

 men to rossia palpebrosa seems to me to lie in the fact that it practi- 

 cally quite agrees with the young female of this species which was 

 found west of Spitzbergen by the Norse Norwegian Sea Expedition 

 (station 363, 80 03' N. Lat. 8 28' E. Long. 475 m.). Dr. APPELLOF states 

 no doubt in "Teuthologische Beitrage" that this specimen is furnished 

 on the back with small whitish papillae: still the papillae are smaller, 



