671 



species is chiefly distinguished by the body, especially of the male, being- 

 more slender, and by the less elongated branchial appendages. 



Occurrence. I have taken this form several times in great abun- 

 dance from the common Humpback-Whale (Megaptera boops), killed off the 

 Finmark coast, at Vadse and Servig. It was found in different places 

 of the skin of the whale: on the head., within the belly-furrows, in the 

 sexual region, and on the breast-fins, generally associated with Cor oval 

 diadema. 



Distribution. Greenland (Fabricius), Iceland (Liitken). 



