CRTJSTACEA. 
71 
Edwards says that it is very common in the Mediterranean. 
Eisso does not mention it, unless, as is not improbable, that his 
species of P. LeacMi be identical with it. 
Eoetunus pnsiLi/tJS. — Dwarf Crab. — Leach, Malae. Brit. Crust., 
t. IX ; Milne Bdw or ds. Mist. des. Crust., t 1, p. 444 ; Bell, Brit. 
Stalk-Myed Crust., p. 112. 
P. Maeulatus. — Risso, Mist. Nat. En Merid., V, p. 5. 
Common. Bell says that this species inhabits deep water 
9-nd is common on the Coasts of Devonshire and Cornwall. It is 
found from the Isle of Man to the Mediterranean sea, from which 
it has been recorded by Eisso and Eoux. 
Its ordinary size is about four lines in length. But Mr. 
cAndrew took a male off the Isle of Man fully an inch in 
l^readth and eight tenths of an inch in length. 
PINNOTMERII>M:.—{Px&Ks.vno Ceabs.) 
Genus, Pinnotheees. — Fair, Leach, Edwards. 
Antenn® small, short, eyes impoverished, small, on short pe- 
duncles ; carapace round, globular ; chelse, sub-eq^ual, legs short. 
These crabs inhabit the shells of bivalve MoUusca. 
Einnotheees pisum — P ea Crab. — Pennant, pi. 1, fig. 1 ; Leach, 
Malae. Brit., t. 14; MilneEdwards, Mist, des Crust., t. 1,p. 30; 
Bell, Brit. Stall Eyed Crust., p. 121. 
“This species seems rare with us and only found in the Mussel 
shell, the natural inhabitant of which it either finds diseased or 
renders so. I have never found it in the Pinna as reported by 
Authors, though many have been examined for that purpose. 
Mr. Ball informed Mr. Bell that he had, on two occasions, 
taken a great number of Pinnotheres, which were all males, from 
Ga^'diwm edulis (the common cockle), nine out of every ten con- 
tained a crab. On opening oysters at Tenby, in Wales, he has 
likewise procured this crab, and says that at every age it gener- 
®'liy selects such shell as with out-stretched legs it would fill 
trom side to side. 
The young or zoea of this crab has been described and figured 
V Mr. Vaughan Thompson in the Entomological Magazine, 
iii, p. 88, which has been copied into BelVs British Stalk-Eyed 
Crustacea, as a vignette to page 125. 
