Mr. Jeffreys on British Mollusca. 113 



sublittoral and coralline zones at Guernsey ; and I noticed a specimen 

 among the shells which Mr. Barlee collected this year in the Shet- 

 lands. 



O. albella, Lov. O. Rissoides, var., iii. 286. Salcombe, fide 

 Alder (Rev. Mr. Norman) ; Oban (Capt. Bedford) ; Guernsey, with 

 O. Rissoides. I still consider it to be distinct from that species. 

 The spire in this is more cylindrical, and the whorls are never turri- 

 culate or so convex as in O. Rissoides. The circumstance also of 

 their being found together, without any intermediate variation, is a 

 strong argument in favour of their being distinct species. 



O. acuta, iii. 269. Plymouth (^Rev. Mr. Norman) ; Guernsey and 

 Zetland (J. G.J.). 



O. turrita, Jeffr. in Ann. Nat. Hist. (2nd series) vol. ii. p. 339. 

 CoraUine zone, Exmouth (Mr. Clark) ; Guernsey. 



O. alba, iii. 278 ; var. A figure of this elegant variety will be 

 found in PI. III. f. 20 a, b. 



O. nitida, iii. 280. Mr. Clark has found a specimen of this rare 

 and local species at Exmouth. 



O. cylindrica, iii. 287- Clyde district {Rev. Mr. Norman) ; in 

 dredged sand from Belfast Bay (J. G. J.). 



O. truncatula, iii. 294. Belfast Bay. Plymouth was the only 

 previously known station for this species. 



O. dolioliformis, iii. 301. Guernsey. 



Eulimella clavula, iii. 314. Guernsey; very rare. 



Truncatella Montagui, iii. 317. Newhaven, Sussex. I have 

 shown, in PI. III. fig. 21, the lingual riband of this mollusk, which 

 may be interesting as a further illustration of the relations which 

 exist between Truncatella and Assiminia. 



Natica monilifera, iii. 326. A very young reversed variety occurred 

 to me in the Guernsey dredged sand. 



N. sordida, iii. 334. Mr. Barlee obtained in the Zetland dredgings 

 a young specimen which is of a yellowish-white colour, and marked 

 with three brown interrupted or streaked bands. 



N. Montagui, iii. 336 ; var. alba. A specimen of this pretty va- 

 riety occurred to Mr. Barlee in the last Zetland dredgings. 



N. Helicoides, iii. 339. A specimen procured by Mr. Barlee in 

 Zetland, and now in his possession, is of the enormous dimensions of 

 one inch and five-eighths in length and one inch in breadth. 



N. clausa (Sowerby), Lov. 17. I found a few young specimens, 

 apparently quite recent and fresh, in dredged sand from Belfast Bay, 

 which Mr. Waller kindly sent me. It is true that this species occurs 

 as a Pleistocene fossil in the Clyde bed ; but the aspect and texture of 

 specimens from that locality are very different from those of my shells. 

 It inhabits the Norwegian coast in company with Terebratula caput- 

 serpentis, Crenella decussata^ and many others which also are found 

 living in Belfast Bay ; and I believe that Buccinum (or Astyris) Hdl- 

 bolliiy which has been taken in the same part of the Irish Sea, has 

 not yet been discovered as Pleistocene, though it is also a Norwegian 

 species. Among the shells from the Turbot Bank in Belfast Bay, I 

 detected some which were unquestionably fossil, having their texture 



Ann. §• Mag, N, Hist, Ser. 3. Vol. iii. 8 



