32 



The Irish Nahiralist. 



February, 



pre vale nt]^ in most parts of the west of Ireland, once the limestone 

 districts are left behind. The larger form, with more impressed suture, 

 elongated spire, and heavier shell, is considered by Mr. Kennard to 

 be referable to a distinct species under the name of Succinea Schu- 

 macheri Andreae. 



Carychium minimum Miiller. — (T.) — Common in all damp places, on the 

 Gt. Blasket, and on the promontory, to about 1,200 feet altitude ; 

 but not seen on the higher cliffs, such as those at Connor Hill and 

 Brandon. 



Ancylus fluviatilis Miiller. — (T.) — Lough Anscaul ; Lough Toorecnmartin, 

 1,200 ft. ; Coumenare Lakes, 1,100-1,350 feet ; and in the lakes of 

 Coumaknock, on Brandon Mountain, to 2,300 feet, at which height 

 the highest of these lakes lies. The form which occurs in these moun- 

 tain tarns is exceptionally fragile, as Mr. Tomlin has pointed out. 

 This is perhaps due to the low temperature of the water and to the 

 absence of lime. Two visits to Lough Avoonane failed to reveal the 

 presence of this species there, which shows that it is not universallv 

 distributed in the district. 



Limnaea pereger (Miiller).- — (T.) — This usually ubiquitous species is not 

 by any means universally distributed in the district, but is found in 

 most of the lower-lying lakes and in the coastal marshes. It was taken 

 at Milltown, near Dingle ; in the marshes at SmerAvick, Inch, and 

 Stradbally ; in Lough Gill and Lough Naparka, near Castlegregory ; 

 in Lough Anscaul, Lough Avoonane, Lough Cruttia (650 feet), and 

 in Clogharee Lough. I was greatly disappointed not to find examples 

 of the Limnaea involuta group in the mountain tarns, such as those 

 on Brandon Mountain, or Lough Doon or Lough Tooreenmartin. 

 An extreme lacustrine form of Limnaea pereger does occur, however, 

 in the five lakes mentioned last in the list given above. This form 

 has the regular striation which is characteristic of most lake forms 

 of the species. 



L. palustris (Miiller). — (T.) — Common in the marshes at Smerwick Bay, 

 below Gallerus, and reported from the Cloghane district by Mr. 

 Tomlin, but not seen elsewhere. 



L. truncatula (Miiller).- — (T.) — Generally distributed over the promontory, 

 and in one spot on the Gt. Blasket it occurred abundantly. It ascends 

 the mountains to a considerable elevation, being observed on Brandon 

 Mountain as high as 750 feet ; on the cliffs west of Lough Anscaul 

 to 1,100 feet ; and on those of Connor Hill to 1,200 feet. 



Planorbis albus Miiller. — Confined to the marshes near Stradbally and to 

 Lough Gill, on the northern side of the peninsula. 



P. glaber ]efiTeys= Planorbis laevis Alder. — A single dead shell occurred 

 in Lough Naparka. This was on my second visit to the district, 

 when all the lakes were unworkable owing to the heavy rain. Also 

 taken in the marshes west of Lough Gill. 



P. crista (L.). — Fairly common in parts of the marshes at Stradbally, and 

 also occurs in Lough Gill. 



P. leucostoma M.x\\et= Planorbis spirorbis Auct. (?) Linne. — (T.) — The only 

 member of the genus which occurs along the southern shore of the 



