126 The Irish Naturalist. Aug.-Sept., 



by decollation, but one or two of the perfect ones I 

 took were the highest spired I have taken in any Irish 

 pool, except some extraordinary ones from a pool on 

 Inishmore in the Aran Islands, which Mr. R. A. 

 Phillips jokingly remarked looked like a cross between 

 L. pereger and L. trimcatula. The shells were rough 

 and coarse with no glossiness at all. 

 Lough Derreenadavodia, 800 feet, nil ; I was very 



disappointed in this fine sheet of water. 

 Lough Eekenohoolikeaghaum, 850 feet ; this lake and 

 Lough Derreenadavodia are situated in a high saddle 

 at the end of the Coomarkane Valley, where the Caha 

 mountains jut out to Slieve-na-Goil (sugar loaf). It 

 contains a race of Limnaea pereger exactly similar to 

 that found in Lough More, small, closely striated and 

 glossy, with a deep suture and short spire, often slightly 

 decollated. In a few instances perfect full-grown 

 specimens had no projecting external spire, the 

 specimens were not intorted but the top of the spire 

 was flush with the next and subsequent whorls, giving 

 a rounded top to the shell. 

 Lough Avaul, 400 feet, on the Castletown Road, wdiere 

 the hills drop from Slieve-na-Goil to the sea. This 

 interesting lake, partially drained last autumn, formerly 

 contained (1914) two races of L. pereger ; a round 

 short-spired rough form inhabiting the lake itself, while 

 a narrow, very smooth and glossy, bright reddish 

 coloured one was abundant clinging to the rocks of 

 the waterfall at its outlet. The lake specimens were 

 . perfect, the outlet ones almost all decollated. 

 Lough Nagarriva, 1,200 feet. In vSouth Kerry. The 

 historic locality where L. praetcmiis was discovered 

 by Messrs. Stelfox and Milne in 1907 ; the hills in 

 which it is situated are a continuation of the same 

 range as the Cahas ; the specimens have higher spires 

 than the Caha ones, but appear identical in habits, 

 appearance in the water, and the diaphanous texture 

 of the shell, which when fresh and wet can be pressed 

 almost fiat and inflated again like that of Hygromia 

 jusca. • 



