ACME. 309 



the River Avon at Bristol; Ballinahinch;, Co. Galway 

 (J. G. J.) ; Killarney (Barlee). Var. 2. A single speci- 

 men among the refuse of the Avon at Bristol (J. G. J.) . 

 This species, as well as the reversed variety, has been 

 found in our upper tertiary beds at Copford. Gerstfeldt 

 has recorded it from Western Siberia, and Villa from 

 Normandy; but, although it occurs in intermediate 

 countries, I do not find any notice of it as Scandinavian. 

 It inhabits France, Germany, and Switzerland. 



A living specimen, which I observed in the North of 

 Ireland, did not seem to be shy or inactive while kept 

 in the shade ; but when it was exposed to the glare of 

 the sun^s rays, it immediately shut up and disappeared. 

 Dr. Gray says that "the animal walks with its shell 

 nearly perpendicular, twisting it round in a very odd 

 manner, and then letting it suddenly fall again.^^ The 

 strise on the shell are very irregular in respect of num- 

 ber ; and in a specimen now before me they are entirely 

 wanting in some parts ; so that I should not be much 

 surprised if the A.fusca of Beck (which he separated 

 from our species on account of its wanting the strise) 

 should prove to be merely a smooth variety of the 

 present species. Brown has apparently described and 

 figured this variety, in his 'Illustrations of the Land 

 and Freshwater Conchology of Great Britain and Ire- 

 land' (p. 29, pi. iv. f. 16), under the name oi A. minuta. 



The present species was first made known by Walker 

 (Test. min. rar. litt. Sandv. p. 12, f.42), and was described 

 by Montagu as Turbo fuscus, but subsequently to the 

 date and publication of Draparnaud's ' Tableau des Mol- 

 lusques.' Moquin-Tandon considered Walker's shell to 

 be distinct from that of Draparnaud, and has described 

 the former as quite smooth; but Jacob's diagnosis in 

 Walker's work distinctly mentions its being striated. 



