508 



Mr. J. W. Pi-yde on Annelida Poltfchcela 



OnupMs conchylega, Sars, 1835. 



This species was founrl abundantly at many stations, as 

 the following table shows : — 



It was dredged by H.M.S. ' Triton ' in 608 fathoms in the 

 Atlantic, and obtained off Tyneinouth in 40 fathoms by 

 Prof. G. S. Brady. It ranges to Norway, Greenland, Fin- 

 mark Nova Zembla, and the American coast. Numerous 

 examples have been found from 98 to 325 fathoms off 

 Florida. Prof. Izuka records it in Japanese waters, having 

 procured it at Yodomi in Sagami Bay and in Suruga Bay 

 ('Albatross'). The 'Challenger' dredged it off Cape St. 

 Vincent in 900 fathonas, and also south of Halifax in 

 85 fathoms. From the tables given by Eulenstein this 

 annelid is very abundant in the northern latitudes of the 

 German North Sea, as well as in the North Sea waters off 

 the east coast of Scotland. 



The head resembles that of O. britannica in outline, but 

 the frontal tentacles are more rounded and have pigment 

 behind them. The eyes, too, are smaller and lie exterior to 

 the bases of the posterior lateral tentacles, which, like those 

 of O. britannica, are larger than the anterior laterals. The 

 median tentacle is the longest, and at its base in several 

 examples there is a dark pigment speck. All the tentacles 



