34 Mr. Jeffreys on British Mollusca. 



which is not angulated Uke Cryptodon Jlexuosmn, and has no vestige 

 of a tooth, although the shell is three times as large. 



Montacuta ferruginosa, ii. 72. Bantry {Rev. M?\ Noi-man). 



M. hitlentata, ii. 75. Hunstanton and Falmouth {Rev. Mr. Nor- 

 man). To this species helongs a shell which was sent by Professor 

 Loven to Mr. Alder, and forwarded by the latter to me for examina- 

 tion, under the name of '' Mesodesma exiguum •,'" and it seems to 

 agree with Loven's description of the last-named species. 



M. substriata, ii. 77. Weymouth {Mr. Thompson). 



Kellia lactea. Tellimya lacteu, Brown, 111. Br. Conch, p. 106. 

 pi. 42. f. 10, 11. K. suborbicularis, B. M. ii. 87. pi. 18. f. 9 (not 

 9^ or 9''). K. lactea, Loven, p. 44. K. Cailliaudi, Recluz in Journ. 

 de Conch, t. vi. p. 340. pi. 12. f. 4, 5. I believe this is a distinct 

 species from K. suborbicularis, being of a more ovate form, with the 

 front margin somewhat compressed, and the form and position of 

 the hinge, teeth, and ligament being different. It may be the variety 

 noticed by Montagu. I have given a figure of the hinge and teeth in 

 PL II. fig. 1, which may be compared with that of K. suborbicularis in 

 the ' British Mollusca,' to show the distinction between them in this 

 respect, the other figures in the same work admirably characterizing 

 their respective forms. This species is not so common as K. sub- 

 orbicularis ; but both of them occur together on all parts of our 

 coast from the Channel Isles to Zetland. M. Cailliaud of Nantes, 

 who first discovered it in France, identified my shells as Recluz's 

 species ; and I also found specimens this autumn on the coast of 

 Normandy. Mr. M'Andrew has taken it on the Atlantic coast of 

 Spain ; and I have seen a specimen which was received by Mr. Alder 

 from Professor Loven as his K. lactea. 



K. rubra, ii. 94. Weymouth {Mr. Thompson). 



Lepton squamosum, ii. 98. Falmouth {Rev. Mr. Norman). I 

 have also taken it on the coast of Normandy with other shells hitherto 

 considered to be confined to this country, and which will probably 

 be noticed by M. Petit in the ' Journal de Conchyhologie.' 



L. Clarkise, iv. 255. Zetland {Mr. Barlee). 



L. sulcatulum, n, s. PL II. fig. 2 a-g. 

 Testa subrotunda, convexiuscula, nitida, pellucida, alba, sulcis con- 

 fertis concentrice insculpta ; margine antico aliquando (prsesertim 

 in adultis) sinuato ; umbonibus prominulis, calyculatis, glabris ; 

 dentibus, in valvula dextra duo lateralibus validis approximatis, 

 in valvula sinistra uno cardinali et duo lateralibus utrinque ap- 

 proximantibus ; ligamento (uti in congeneribus) interno, fovea 

 centrali triangulari, recepto ; long. Jj unc, lat. fere eadem. 

 This new and exquisitely beautiful species occurred to me rather 

 plentifully in dredged sand and washings of corallines from the sub- 

 littoral zone at Guernsey. I also noticed it at Paris among some 

 minute shells from Sardinia which were submitted to my inspection, 

 as well as in Mr. M'Andrew's cabinet from Orotava and Lancerote in 

 the Canaries ; so that it aj)pears to have a wide range. Mr. Clark 

 justly remarks that it is allied to L. Clarkice. In form and sculpture 



