TROCHUS. 535 



is short, but convex ; the apex is obtuse. The base is 

 not compressed, but moderately rounded ; the umbilicus is 

 rather small, and is somewhat coarsely, though obscurely 

 grooved in a longitudinal direction at its commencement. 

 The aperture is very large, occupying about four-sevenths 

 of the entire length, and at least half the basal diameter ; 

 it is circular and almost continuous ; the outer lip is acute 

 and simple, the pillar-lip narrow, erect, but inclining a little 

 towards the umbilicus. The specimens described from (the 

 types) are only the twenty-fifth part of an inch in width, 

 and about the thirty-fifth of an inch in length. They were 

 taken by Mr. Jeffreys at Lerwick, the Shetland Isles, and 

 Loch Carron. 



According to its discoverer it has a range of from ten to 

 forty fathoms, and, besides the places mentioned, has been 

 taken at Skye, at Falmouth, and Sandwich, and, by Mr. 

 Clark, at Exmouth. Mr. Barlee informs us that he has 

 taken it at Loch Carron, Loch Alsh, and at Oban. 



Note. — Margarita olivacea, Brown, Illust. Conch. G. B. p. 17, pi. 10, f. 30, 

 31. " Thin olive-coloured, pellucid, smooth, subglobose ; body large, inflated; 

 spire small, short, with three depressed volutions, terminating in a moderately 

 pointed apex ; aperture large, circular, standing out from the body ; outer lip 

 thin, continuous with the inner lip above, which is narrow, and a small circular 

 umbilicus behind. Length two-tenths of an inch. Found at Greenock by Stewart 

 Ker, Esq." 



Neither ourselves nor any of our many correspondents have recognised this 

 shell, which in shape is represented as not unlike a very large pwsillus. Judging 

 from the locality given it was probably a pleistocene fossil. 



M. aurea, Brown, 111. Conch. G. B. p. 17, pi. 10, f. 23. " Strong, with four 

 depressed, well divided volutions, covered with very strong spiral stria." ; aperture 

 round, which, with the pillar-lip, is tinged with a golden metallic hue ; outer lip 

 strong; inner lip smooth, very broadly reflected on the columella, and somewhat 

 sharp at the base ; colour of a deep brownish-pink, with a golden metallic lustre. 

 Length and breadth about a quarter of an inch. Found at Seaton, Northumber- 

 land, by W. C. Trevelyan, Esq." 



The figure looks like a foreign Turbo. We hope to examine the type before 

 the conclusion of our work. 



