448 COROPHIIDiE. 



sublunatc, the palm running parallel nearly the entire 

 length of the hand, and fringed with several equidistant 

 plumose hairs ; a projecting lobe is situated near the 

 base of the palm, which is defined by a prominence 

 covered with a few hairs, and short stiff spines sub- 

 apically tipped with a single cilium : the finger is 

 slightly serrated along the interior margin. In a speci- 

 men received from Ilfracombe, from which the figure 

 was drawn, the hand has undergone a considerable 

 variation, the lunate portion is very much shortened, 

 whereas the two lobes at the base are very much 

 widened, though not more prominent. The finger like- 

 wise has undergone a change, being, in the typical form, 

 somewhat dilated near the centre of the inner margin, 

 corresponding with the concavity of the palm, whereas 

 in the Ilfracombe variety there is no dilatation, it is also 

 more strongly serrated ; but this variation in the finger 

 is evidently an adaptation to, and dependent upon, the 

 form of the palm. 



There is little in the structure of this species worthy 

 of attention as differing from the preceding. The 

 surface of the integument is covered with numerous 

 minute points, and more thickly covered by exquisitely 

 fine down, which appears to be arranged in uneven 

 rows as shown at figure K. 



This species appears to live in deeper water, or not 

 so near the surface as the preceding, and to build its 

 nests chiefly of mud. These nests, when broken up and 

 examined by the microscope, do not exhibit any of that 

 threadlike material which exists so abundantly in the 

 others. 



Our figure and description are taken from specimens 

 sent to us by Mr. Gosse, who procured them at Tenby 



