MancJiester Memoirs, Vol. xlv. {\(^o\), No. 14. 13 



Christiania and neighbouring fjords), N.E. and W. coasts 

 of Scotland, the most southerly limit being Millport on 

 the Clyde. It has also been taken on the other side of 

 and the Atlantic, viz., on the western shores of Greenland, 

 and along the eastern coast of the United States 

 (previously mentioned). 



M'Intosh, in the Challenger Reports ('85, p. 359), 

 states that his specimens are much smaller than the 

 European examples, the largest measuring only 18 mm. 

 Size is not a character of much importance in this con- 

 nection, for 12 specimens from Norway and Sweden have 

 the following approximate lengths : (i) 56 mm. (this is 

 almost the largest recorded specimen) ; (2) 35 mm. ; (3) 

 26 mm.; (4) 22 mm.; (5) 16 mm. ; (6-12) 7 specimens 

 all of which are between 13 and I4'3 mm. long. 1 hus of 

 12 European specimens, 8 are less than M'Intosh's 

 Challenger specimens. M'Intosh states that the southern 

 specimens have a more fusiform outline and are less 

 inflated. This, again, is not a character of any constancy, 

 for the shape varies enormously in a series of specimens 

 from the same locality. 



He also states that there is a prominent and con- 

 tinuous fold behind the head in British and Norwegian 

 forms, but in the Challenger specimens the head has a 

 greater antero-posterior diameter and there are two 

 papillae. 



In Dr. Ashworth's opinion, this is due to the fact 

 that, in the southern specimens, the musculature was 

 comparatively relaxed at the time the animals died, and 

 the head is therefore more completely expanded in those 

 specimens. As far as he is able to judge without seeing 

 the actual specimens, M'Intosh's southern forms agree 

 with the northern forms in the sculpturing of body wall, 

 peculiar furcate sitae (M'Intosh r85), pi. xxii.A, fig. 21) 

 head, parapodia, cirri, etc. 



