288 



THE ZOOLOGIST. 



captured at Gyllyngvase. It has been taken in Wbitsand Bay 

 East by Norman. P. biguttatus (Bisso), a Mediterranean 

 species, was obtained by Garstang at low spring- tide burrowing 

 in a patch of coarse shell- sand on the south side of Drake 

 Island. 



The Shore Crab, Carcinus moenas (Pennant), is everywhere 

 common between tidemarks and in shallow water all round the 

 coast, and at Scilly. It occurs occasionally in the Carrick Eoads, 

 Falmouth Harbour, at a depth of 16 fathoms, and as a casual 

 on outer trawling grounds down to 40 fathoms. It appears to 

 breed all the year round. 



Bathynectes longipes (Eisso) is a Mediterranean species, first 

 obtained in British waters by Forbes and McAndrew, who 

 dredged it in Falmouth Bay in 1848. It was found several 

 times by Cocks about Falmouth, and once by E. Quiller Couch 

 in Mount's Bay. Some years ago it was taken by Norman at 

 Polperro, and by Garstang in fine sand near the Eddy stone 

 (M.B.A.). Eecently it has been dredged in Gerrans Bay, and 

 trawled in 45 fathoms seven miles south-east of the Gull Bock, 

 Portscatho, and in 40 fathoms a few miles north of Menavawr, 

 Scilly. 



The members of the genus Port units all swim with a see-saw 

 movement of their elbow-bent swimming feet, which has attracted 

 to them the name of "Fiddler Crabs." Because of their fond- 

 ness for garbage they are frequently spoken of as Cleanser 

 Crabs. The Dwarf Swimming Crab, Portunus pusillus, Leach, is 

 occasionally obtained between tidemarks and in shallow water, 

 but is much commoner on clean sand or gravel from 10 down to 

 45 fathoms. It occurs on the Eddystone Grounds (M. B. A.); in 

 20 fathoms south of Whitsand Bay East ; in shallow water 

 off St. George's Island, Looe ; irregularly from low-water to 

 30 fathoms off Polperro, and is locally plentiful in St. Austell, 

 Mevagissey, and Gerrans Bay from 2 or 3 fathoms downwards. 

 It is patchily abundant about the Falmouth district, both in the 

 harbour and eastward as far as a line running southward from 

 the Gull Bock, Portscatho, to opposite the Lizard. In Mount's 

 Bay its distribution is very irregular, and it appears to be on 

 the whole rather scarce. A single specimen has been obtained 

 at low spring-tide on the beach at Porthcurnow. On the north 



