4^ Mr. Jefireys on British Mollusca. 



meris, whicli is quite of another shape, with the margin crenulate^ . 

 and has only three or four tooth-hke lamellae on each side of the beak, 

 besides wanting the central pit for the ligament. The Pectunculus 

 (Limopsis) minutus of Philippi has an oblique form, much fewer teeth, 

 more distinct auricles, and a crenulated margin ; and the sculpture is 

 very different. Our shell is more nearly allied to the Area aurita of 

 Brocchi ; but in that species the form is also more oblique, and the 

 surface is striated and sometimes decussated by the lines of growth. 

 This sometimes resembles in appearance a minute Ungulina. 



Lima subauriculata, ii. 263. Bantry {Rev. Mr. Norman). Loven's 

 specimens of L. sulculus agree with this in every respect ; but I do 

 not know his L. subauriculata. Judging from his description, it 

 appears to be different from our species of the same name. 



L. Loscombii, ii. 265. Mr. Hyndman, in his Report of the Belfast 

 Dredging Committee for 1857, says, at page 224, that this species 

 " makes a nest for itself, like Mans, but often occurs without any. 

 The animal swims vigorously through the water. The late James 

 Rose Clealand, Esq., of Rathgael House, discovered this shell many 

 years ago, off the Copeland Isles, and was aware of its making a 

 nest." 



L. hians, ii. 268. There appears to be a difference, but perhaps 

 only a local or varietal one, between specimens taken in the west of 

 Scotland and the south coast of England, — the former being larger 

 and more swollen, and having the ribs and striae much coarser, while 

 adult shells from the latter locality are much smaller and flatter, and 

 have a more delicate sculpture. Although the Scotch individuals 

 form comfortable nests, those which inhabit the Channel Isles have 

 none, but are found free under stones at low water. 



Pecten furtivus, Love'n, p. 31. Specimens received by Mr. Alder 

 and Mr. Hanley from Professor Loven with this name, and which I 

 have had an opportunity of examining, agree in every respect with 

 our shells, and cannot be mistaken for any variety or modification of 

 P. striatvs. 



P. aratus. P. sulcatus, Miill. Zool. Dan. Prodr. p. 248. no. 2995 ; 

 Lov. p. 30. no. 228. Ostrea arata, Gmel. Linn. Syst. Nat. p. 3327. 

 no. 60. A single valve, in a recent state, was taken by the dredge, 

 under Mr, Barlee's directions, in from 60 to 80 fathoms, off the 

 Skerries. Miiller's original name of sulcatus haiing been pre-occu- 

 pied by Born for a well-known Mediterranean species, Gmelin's 

 name must be adopted for this. 



Acephala PalliobrancMata, or BracMopoda. 



It is not improbable that this peculiar group of the Mollusca will 

 have to be transferred to the Molluscoidea, and be assigned a place 

 between the Bryozoa and Tunicata. No one can examine the Ar- 

 (jiopes and Lepralice without being struck by the analogy between 

 them in respect of the form, texture, and sculpture of their shells. 

 Since the time of Montagu, the great tribe of the Testacea has lost 

 several of its most important members in the Testaceous Annelides, 



