312 Mr. J. G. Jeffreys on some British Shells. 



species seems to be represented in fig. 14 of the plate to Capt. 

 Laskey^s account of North British Testacea in the Memoirs of 

 the Wernerian Society. 



Pleurotoma Ginannianum, Phil. vol. ii. p. 168. t. 26. f. 6. 

 Ichnusa Setaba, Clark, MSS. Lerwick (1841) as well as the 

 southern and western coasts. This species is closely allied to the 

 last. It differs from PL nebula in more abruptly tapering, having 

 a rough aspect and the ribs being more raised and arched. The 

 aperture is more straight and contracted. The colour is always 

 of a uniform yellowish browu; but the P. nebula is yellowish white, 

 with invariably two dark purplish bands on the last volution, one 

 of which is continued on the upper part of each of the other vo- 

 lutions. This species seems also to be more common and gene- 

 rally distributed than the PL nebula, which is a southern form. 



Several of the rarer species of Pleurotoma (including PL teres, 

 coarctatum, Trevelyanum, accinctum, &c.) also occurred to us. 



Buccinum Humphrey sianum, Zool. Journ. vol. i. p. 398. A 

 young specimen of this shell was found by Mr. Barlee at Skye. 



Emarginula crassa. Skye, Lochs Duish and Fyne. 



Cemoria Noachina. Not uncommon on many parts of the west- 

 ern coast of Scotland. 



Velutina flexilis. Skye, and by myself in 1844 at Ullapool. 



Patella falva. Not uncommon on many parts of the western 

 coast of Scotland. 



Chiton Hanleyi, Oban and Skye. 



Chiton cancellatus. Ch. alveolus (Sars), Loven, Moll. Scand. 

 p. 27?. 



Chiton albus. On several parts of the western coast of Scotland. 



One specimen of Chiton, which appears to be undescribed, was 

 found by Mr. Barlee at Inverary ; but until more specimens have 

 been found, it is perhaps better not to assign it a distinct name 

 at present. It resembles in form C. albus, but is more strongly 

 beaked and the granulations are more like those in C. marginatus. 

 The margin is intermediate between the two. Colour brownish 

 white. 



ACEPHALA. 



Terebratula seminulum, Phil. vol. i. p. 97. t. 6. f. 15/? One 

 specimen was found by me in company with Mr. Barlee at Skye 

 in fifty fathoms attached by its byssus. 



The species is described by Philippi to be very variable in form ; 

 but I am not quite satisfied as to the identity of my shell with 

 that species. This is half the size, of a brownish colour, and nearly 

 smooth, whereas the T. seminulum is of a whitish colour, and 

 thickly punctured over the surface. Further discoveries may 

 clear up the doubt. 



A depressed variety (?) of the Ostrea edulis, having the inside 



