NOTES ON CORNISH CRUSTACEA. 



295 



between tidemarks, and ventures for miles up the creeks of the 

 Fal. On the north coast it is evidently scarce, but has been 

 taken in 18 fathoms off Zennor, in 14 fathoms to the west of 

 Chapel Porth, and has been found several times in trawl-refuse 

 at Padstow. At Scilly it occurs in 30 to 35 fathoms on fine sand 

 fully half a mile south of Penninis Head, and has been taken in 

 Porth Cressa Bay and elsewhere. Fine specimens have been 

 picked out of trawl-refuse from some miles north-west of the 

 Bishop. Females in berry are found most plentifully from the 

 beginning of March to the middle of April, and again from the 

 second week in June till the close of July. I. dorynchus, Leach, 

 is usually scarce, and nowhere so common as the preceding 

 species is in places, but is widely distributed along the south 

 coast from low water down to about 20 fathoms. It has been 

 taken under stones on the beach at Porfcwrinkle, Looe, and 

 Talland ; is not infrequent in Crab-pots at Polperro, Mevagissey 

 and Gorran, and has twice been taken in Gerrans Bay. In 

 Falmouth Bay it is dredged at long intervals, but has been twice 

 captured in rock-pools at Gyllyngvase, and several times in Car- 

 rick Boads. It occasionally appears in trawl-refuse at Meva- 

 gissey and at Penzance, and has been reported from Porthgwarra 

 and Sennen Cove. It has been obtained in Crab-pots at Scilly, 

 and on the north coast at Zennor. Females have been found in 

 berry in March and April. I. leptochinis, Leach, is evidently 

 scarce and confined to the Outer trawling grounds off Falmouth 

 Buy. The type specimen of Achceus cra?ichi, Leach, was dredged 

 by Cranch off Falmouth in the early years of last century. 

 Cocks, in 1849, records three specimens from Sertularia pumila 

 at low spring tide on Gyllyngvase beach. In recent years it has 

 been dredged on Queen's Ground and elsewhere in Plymouth 

 Sound (M. B. A.), in 5 fathoms on fine sand in Mevagissey Bay, 

 and two females in berry were dredged on Aug. 20th, 1908, in a 

 narrow strip of coarse shell gravel and small flat stones in 

 8 fathoms in Gerrans Bay. Macropodia rostratus (L.), Couch's 

 Long-legged Spider Crab, occurs from low-water mark down to 

 25 fathoms. On beaches and in shallow water it is usually 

 found under seaweed, in rock crevices, and under rock ledges. 

 Beeper down it lives both on gravel and among rocks. It is of 

 frequent occurrence in Cawsand Bay (M. B. A.), has been taken 



