2IO JOURNAL OF CONCHOLOGY, VOL. I4, NO. 7, JULY, I9I4. 



var. attenuata Jeff. — Salcombe. 

 C. discrepans Brown. — Braye Bay, Alderney (Marquand). 



C. debilis Gray, — Sutherlandshire, from haddocks (Baillie) ! off 

 Loch Ryan, 2of, plates only; Ailsa Craig, 2of, plates ; Mull of Can- 

 tire, 3of , plates. 



Length, 07 in. ; breadth, 0*3 in. 



Gwyn Jeffreys has recorded an exceptional specimen an inch in 

 length, dredged by Mr. Barlee in the Shetlands. 



C. scabridus Jeff. — Prof. Gwatkin's remark^ on the radula of this 

 species, he tells me, was meant to apply to C. IcRvis. That of C. scab- 

 ridus, though distinctly different from its congener C. cancellata, "is 

 not at all remarkable in the way C. IcBvis is, which wants the major 

 uncinus." 



C. cancellatus G. B. Sow. — Tenby and Milford. 



C. albus L. — Aberdeenshire, " not uncommon on stones and dead 

 shells from deep water" (Dawson). Being in some doubt of Dr. 

 Dawson's record "not uncommon," I have examined his tablet of six 

 specimens under this name deposited in the Aberdeen University 

 Museum, and I find that four only belong to this species, the remain- 

 ing two being C. cinereus var. rissoi. It must still be considered a 

 rare species in British seas. 



C. marmoreus Fab. — Sutherlandshire, from haddocks (Baillie)! 



Patella vulgata L. — I have already written''^ on the observations 

 of Gwyn Jeffreys, Mr. Collings of Sark, and myself of the limpet- 

 eating habits of rats. But it would appear that P. vulgata is not the 

 only food from marine sources that rats may acquire a taste for, for 

 a fisherman in the Island of Stroma, in the Hebrides, having tracked 

 a huge rat to its lair and killed it, found that it had accumulated a 

 large store of good things, including 115 sand-eels i in. long, nine 

 young cod 9 in. long, besides thirty-two birds of various kinds, all 

 neatly and methodically arranged in its retreat. I do not think it is 

 a regular habit of these rodents to store up food, especially as this 

 source of supply is always open to them, but it may be that this 

 particular rat was anticipating the advent of its usual prolific progeny, 

 and had the bump of acquisition abnormally developed. That rats 

 have an unusual capacity for assimilating a varied diet is further borne 

 out by the fact that in the summer of 191 2 at Ormsby, in Norfolk, 

 they climbed a plum tree (Victorian) trained against a wall, and 

 devoured the crop before the cause was discovered and measures of 

 prevention adopted. 



I Adds, to Brit. Conch., /o?/;-«. of Conch., 1898, vol. ix., p. 63. 

 8 Journ, of Conch., 1898, vol. ix., pp. 64-5. 



