448 
COROPHIID/E. 
sublimate, 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 
