46 Mr. J. G. Jefifreys on British Mollusca. 



labro in adultis exemplis continuo, ad columellam subreflexo ; 

 umbilico parvo, angusto ; operculo membrauaceo, pauci-spirali ; 

 long. -2V, lat. gV ^iiic. 



This exquisite little shell, which is by far the smallest of the true 

 Odostomice, was noticed by Forbes and Hanley at p. 282 of the 

 Appendix to the * British Mollusca,' as allied to the Chemnitzia Gul- 

 sonce of Clark ; but it is widely different from that species in its size, 

 form, markings, and other respects. Its nearest ally, perhaps, is 

 Odostomia cylindrica ; but it may be distinguished from that and 

 other species of Odostomia by its contour and the complete con- 

 tinuity of the lip in adult specimens. The first discoverer of 

 this species was Wr, Barlee, who found it alive on the fronds and 

 roots of Lmninaria digitata in the littoral zone at Lerwick ; and I 

 have also found it, but sparingly, in shelly sand dredged by him in 

 the same locality. I have had the operculum of O. truncatida 

 figured in juxtaposition (PI, II. fig. 4), as no representation of an 

 Odostomian operculum is given in the 'British Mollusca.' 



O. insculpta, iii. 289. Barmouth. 



O. obliqua, iii. 291. Barmouth ; Shetland and Skye sand. 



O. dolioliformis, iii. 301. Barmouth. 



O. decussata, iii. 303. Barmouth. 



Eulimella affinis, iii. 313. Arran Isle, Galway (Barlee), with 

 E. acicida. This appears to be its southernmost limit. 



E. (Aclis) nitidissima, iii. 223. Arran Isle, Galway {Barlee) ; 

 Shetland and Skye sand. 



E. obeliscus, n. s. PI. II. fig. 5. 



Testa elongato-conica, solidula, nitida, alba, strigibus longitudinalibus 

 vix conspicuis impressa; anfractibus G, sensim incresccutibus, com- 

 planatis ; sutura parum profunda, obliqua ; apertura trapeziformi, 

 versus basin subeffusa, vix tertiam spires partem sequante ; colu- 

 mella subrecta, incrassata, edeutula ; labro simplici, iuterrupto, 

 superne inverso ; umbilico nullo ; long, -f-^, lat. J^ unc. 



Of this distinct species I have only taken two or three specimens 

 in Shetland and Skye sand. It has somewhat the aspect of a minia- 

 ture Eidimella Scillce, but is more nearly allied to E. nitidissima. 



Cerithiopsis tuberculare, iii. 3G5. Barmouth. 

 Id. var. alba. Arran Isle, Galway {Barlee), 

 Nassa pygmsea, iii. 394. Barmouth. 



Buccinum Holbollii. 

 Mangelia Holbollii, {Beck) Moller, Ind. Moll. Grcenl. p. 12. 

 Triton Holbollii, Lov. Ind. Moll. Scand. Occiil. p. 12. 

 Columbella (Astyris) Holbollii, MiJrch, Prod. Faun. Moll. Gronl. 

 (1857) p. 14. 



This species was announced at the last meeting of the British 

 Association as having been taken in the north of Ireland. Mr. Waller 

 (who obligingly presented me with a specimen) informs me that he 



