200 Prof. C. Mobius on the Mollusca dx. of the 



eastern America, Sitka, Mediterranean, Canaries, Nqrtli Sea, 

 Western Baltic. 



Brachiopoda. 



1, Terebratula psittacea, Gmel. Length 21, breadth 22, height 

 15 millims. 



Jackson Island. 



Distr. West Greenland, Massachusetts, Spitzbergen, 

 Finmark. 



2. Terebratula cranium, }slxi\\. Length 16, breadth 11, height 

 11 millims. 



Shannon Island, 30 fathoms. 



Distr. Norway, Shetland Isles, Finmark to the Cattegat. 



VERMES. 



Annelides. 



1. Polynoe cirrosa^ Pall. Length 47, breadth 10 millims- 



Sabine Island. 



Distr. Finmark to the Cattegat, Britain, West Greenland, 

 Spitzbergen ; 3-120 fathoms. 



2. Polynoe cirrata, Pall. Length 33, breadth 10 millims. 



Sabine Island, Clavering Straits ; 4-12 fathoms. 

 Distr. Circumpolar ; Baltic to Sitka. 



3. Nereis diversicolor^ Miill. 



Shannon Island. 



Distr. Norway, North Sea, Baltic. 



4. Nereis pelagica, Linn. Length 75, breadth in front Qb 

 millims. 



Distr. Western Baltic to Finmark, Spitzbergen, Iceland, 

 West Greenland. 



5. Leipoceeas, g. n. 



Head without tentacles and tentacular cirri ; fifth body- 

 segment longer than the preceding and following segments, 

 bearing on each side a comb-like series of thick setce (PI. XI. 

 fig. 11) ; branchiae linguliform, on both sides of the back of 

 the segments. 



Leipoceras uviferum, sp. n. PI. XI. figs. 4—14. 



A spirally rolled worm, 38 millims. long, L5 millim. broad 

 in front and 1*2 millim. behind. Seventy segments, the 

 posterior extremity injured. Fore body concave above, arched 

 beneath ; from the eleventh segment onwards the concavity 

 disappears and the back also is arched, so that the body then 



