45 
TAB. XIX. 
FIG. I. 
NYMPHUM GRACILE.« 
N. cinereum ; femoribus cylindricis. w ‘s 
In mari Britannico vulgatissimum. ~ + 
SLENDER NYMPHUM.., 
Cinereous; thighs cylindric. i 
Inhabits the British sea every where, but as it never 
attains to the size of Strom’s Phalangium Marinum (His- 
tory of Sondmor, 208, tab. 2, fig. 16, which is referred to 
by Linnzus* as his Phalangium grossipes), 1 am doubtful 
whether it be the same species. 
FIG... i. 
NYMPHUM FEMORATUM. 
N. rufescens; femoribus dilatatis, compressis. 
Habitat in Anglie cccidentali mari. 
THICK-THIGHED NYMPHUM. 
Reddish ; thighs dilated and compressed. 
I discovered this species on the shores of the Plymouth 
Sound, but am indebted to the researches of Mr. J. Cranch 
of Kingsbridge, for the fine specimen from which our 
figure is taken. Both this and the preceding species are 
represented of nearly twice the natural size. 
* Both Linneus and Fabricius, on the authority of Dr. Konig, assert 
that it penetrates muscle-shells, and sucks out the contents, which seems, 
from the structure of the animal’s mouth, to be impossible. Sir Joseph 
Banks informed me, that those round holes so common in bivalve shells, 
are formed by buccinum undatum (the common whelk): this is alse 
noticed by Cuvier, in the eleventh volume of the Annales du Muséum. 
