86 PROCEEDINGS OF SOCIETIES. 



Zonites crystallinus. Not uncommon. 

 Succinea putris. Not abundant. 



„ Pfeifferi. Generally distributed ; very abundant in some places. I never 

 obtained any specimens which might seem to unite this shell with Suc- 

 cinea putris. 

 Zua lubrica. Abundant. 



Achatina acicula. I obtained some shells in two or three localities on the roots of 

 grass, and by removing a few inches of earth from the surface of the limestone 

 rocks. 

 Pupa umbilicata. Very abundant ; varying, in number of whorls, in size, colour, 

 and transparency, and some being of the toothless variety. I found here, one 

 shell with a second tooth, and a nearly similar one in the north of Ireland ; 

 I considered them as Pupa umbilicata. 

 Vertigo edentula. Not common ; very local ; at Kyle Park. The elongated as 

 well as short variety is found. 

 „ pygmaea. Not uncommon ; on walls and under stones. 

 ,, palustris. Rare and local ; at Finnoe. 



„ pusilla. I procured two or three specimens of this rare shell at Borris 

 Wood. 

 Balaea perversa. Not common. I met one shell with a tooth on the pillar lip. 

 Clausilia nigricans. Very abundant ; exhibiting all the varieties noted in Gray's 



Turton. 

 Carychium minimum. Plentiful. 



Acme fusca. Very rare. I obtained two or three of the pale variety at Kyle Park. 

 Limnaeus auricularius. I found Limnsei, which, taking Turton's figure and descrip- 

 tion, I must range under this species. They are not so much expanded 

 as some I have seen from other localities, or as some of the figures in 

 Brown's Land and Fresh- water Shells. 

 „ pereger. This species is abundant in different parts of the district, where 

 may be found the normal shell, and others representing the varieties 

 ovatus, or lineatus and acutus. Near the mouth of the river, in 

 Lough Derg, I have obtained L. lacustris, and from the stomach of a 

 Gillaroo trout, taken in the same place, a Limnaeus, having the spire 

 quite flat, and some specimens with the spire very slightly elevated, 

 approaching the ordinary form of L. lacustris. The flattened variety 

 would be well described under the name of Convolutus. I believe I 

 have observed, from this flat spired variety, up to L. auricularius, a 

 series whose gradations are so close as to prevent any clear or well-de- 

 fined separation. 

 „ stagnalis. Plentiful. In a small pond, at Finnoe, I obtained a few speci- 

 mens about one inch and a half long. The shell thinner, the sutures 

 deeper, and the volutions more rounded than in the common form, 

 giving the shell a more graceful outline. 

 „ palustris. General and abundant; varying considerably, but not to an ex- 

 treme degree, from the normal form. 

 „ truncatulus. Common, of the ordinary type. A smaller variety is found 

 on stones at the edges of a spring. 

 Ancylus fluviatilis. A small number of these in the river and adjoining drains. 

 Velletia lacustris. Rare ; on water-lilies in the river. 

 Physa fontinalis. Generally rare ; abundant in one drain. 



Aplexus hypnorum. Very rare, except in one small isolated pond, only a few yards 

 in diameter, where it was in great numbers one season, previous to the complete 

 drying up of the pond. 

 Planorbis albus. Very abundant. 



„ laevis. Very rare. I found a few specimens in a small pond at Kyle 



Park. 

 „ imbricatus. Not numerous. In a pond, at Finnoe, and in drains. Some 

 are the smooth variety, and some, though not amongst the smaller, 

 answered very well to the figure of Planorbis cristatus in Brown's Land 

 and Fresh-water Shells. 



