FAMILY COLIMACEA. 117 



2. Vertigo Moulinsiana. Moulins' Vertigo. 



Shell ; minute, tumidly ovate, rather openly umbilicated, yellowish 



horny, very glossy, semitransparent, whorls 



four to five, smooth, very tumid ; aperture 



semioval, with from two to four small teeth, 



lip rather thin, reflected. 

 Pupa Moulinsiana, Dupuy (1849), Cat. Extr. Gall. 



Test. no. 284. 

 Pupa Charpentien, Shuttleworth (1852), Kilst. Conch. 



Cab. p. 129. pi. xvi. f. 41 to 43. 

 Vertigo (Isthmia) Moulinsiana, Moqiun - Tandon 



(1855), Hist. Moll. vol. ii. p. 403. pi. xxviii. f. 31 



to 33. 

 Vertigo Moulinsiana, Jeffreys (1862), Brit. Conch, vol. i. p. 255. 

 Sab. Prance. Switzerland. Heidelberg. West of Ireland. (Under 



stones in marshy places.) 



This species is unknown to me, but it has been well observed in 

 Switzerland by Mr. Shuttleworth and Mr. Jeffreys, and in France 

 by the Abbe Dupuy and M. Moquin-Tandon. It is included in 

 the British fauna only on the grounds of Mr. Jeflreys having lately 

 discovered specimens among some shells which he collected nearly 

 twenty years ago by the side of a small lake at Ballinahinch, near 

 Koundstone, county Galway. " The situations," he says, " where 

 I found it in Switzerland, were like that of the Irish habitat ; 

 and I have no doubt it will be discovered in this country by at- 

 tention being thus drawn to it. The few districts of our eastern 

 counties, as well as the wilds of Connemara, require to be more 

 thoroughly searched." 



The animal V. Moulinsiana is described as being of a dark-grey 

 colour, lighter however, and more slender than that of V. anti- 

 vertigo, with the tentacles more decidedly clavate. The shell is 

 rather larger and more ventricose, and of lighter colour, with fewer 

 teeth (from two to four) in the aperture. 



Such is Mr. Jeffreys' description of the animal of Swiss speci- 

 mens of V. Moulinsiana. M. Moquin-Tandon includes the species 

 in his History of the Mollusks of France, but he is not able to give 

 any description of the animal. He merely gives a drawing, on a 

 considerably magnified scale, of the shell, of which the above figure 

 is a reduced copy. 



