NOTES ON CORNISH CRUSTACEA. 



299 



and shallow water specimens are for the mo3t part immature. It 

 is almost everywhere common in Grab-pots, and very fine speci- 

 mens are so obtained, chiefly in old shells of Buccinum undatum. 

 The shell inhabited by this species in 5 to 30 fathoms usually 

 supplies accommodation for one or more of its singular com- 

 mensal, the Sea Anemone, Adamsia polypus, though the larger 

 shells are occasionally invested with a flourishing colony of the 

 Hydroid, Hydractinia echinata. Buccinum shells, especially 

 when occupied by this Crab, often give lodgment to the Polychsete 

 worm, Nereis fucata, in their apical whorls. Females in berry 

 occur in March and April, and also in July and August, especially 

 in the south-west and north. Eupagurus cuanensis (Thompson) 

 is less abundant and much more local than the preceding species, 

 and is very generally associated with the Sponge (Suberites). In 

 the English Channel and around Scilly it is most plentiful in 

 10 to 50 fathoms, but on the north coast is very scarce down to 

 20 fathoms, below which depth it is fairly common on sand and 

 sandy gravel. It occurs sparingly on the Eame-Eddystone and 

 Eddy stone Grounds (M. B. A.), and in increasing numbers from 

 five to twelve miles W.S.W. of Hand Deeps. It is not uncommon 

 locally around Mevagissey, in Very an and Gerrans Bay, and in 

 Falmouth Bay, where at Gyllyngvase and Maenporth specimens 

 are occasionally taken at low spring tide. It has been found in 

 trawl-refuse from about twelve miles east of Coverack, and com- 

 monly in 25 fathoms to the west of Boa Bock. It has also been 

 captured in Mount's Bay in shallow water near St. Michael's 

 Mount, in Gwavas Bay, and immediately south of Gear Kock, 

 and in Crab-pots at Mousehole. It occurs near the Wolf, and 

 apparently in small numbers over the sea-bottom between Land's 

 End and the Isles of Scilly. In the archipelago it is widely 

 spread and locally common down to about 50 fathoms one and a 

 half miles south-west of the Bishop. It has also been obtained 

 in trawl-refuse from about fifteen miles W.N.W. of Tresco. It 

 has been found in berry on the south coast in April and in July. 

 Eupagurus prideauxi (Leach) is generally distributed in 10 to 

 35 fathoms all round the coast and at Scilly, but is not nearly so 

 plentiful as E. bernhardus. It is scarce in Whitsand Bay East, 

 but moderately common from Polperro westwards, except on fine 

 sand, and where exposed to the sweep of heavy seas. It is fairly 



