22 



The Irish Naturaiist> 



February, 



had collected in the neighbourhood of Cloghane in the month 

 of April of that year. In the hst given below the letter T 

 follows the names of those species found by Mr. Tomlin. 



The list of species which I found on the Great and Little 

 Blaskets in June, I9i2,has already appeared in this Journal.^ 



Mr. Welch has discovered several interesting MS. notes 

 referring to the district in an interleaved copy of Wm. 

 Thompson's Catalogue of the Irish Land and Freshwater 

 Mollusca. This contains the book-plate of Robert Callwell, 

 a well-known Dublin naturalist, and some of the pencil 

 notes in it are presumably in his writing.^ The first note of 

 importance is oh page 117 under the heading of Limnaca 

 auricularia : " Loch Niscaul, on side of Caherconree Moun- 

 tain, by Wm. Andrews." The second note on page 125 is 

 more surprising ; it reads : "P. corneus. Loch Niscaul, W. 

 side of Caherconree Mountain. Specimens obtained from 

 Wm. Andrews, June, '41." There are several reasons for 

 doubting these two records. There is evidence to show that 

 Andrews did not always attach the correct locality to the 

 specimens which he sent to his friends. Moreover, there is 

 no lake on the western side of Caherconree Mountain ; but 

 some nine miles to the westward is Lough Anscaul, which 

 could easily be corrupted to read " Lough Niscaul." I 

 presume, therefore, that this is the lake intended. It is 

 fairly large, about half -a -mile long and nearly as broad, 

 apparently not deep, with stony margins, clear water, and 

 little vegetation, fed and drained by a small, rapidly flowing 

 river. It contains Ancylus fluviatilis, Limnaca pereger, 

 Physa fontinalis, Pisidiuni casertanum , P. personatum, and 

 P. milium. Since Andrews' time the distribution of the 

 various species has been carefully worked out, and it is now 

 believed that Planorbis corneus is confined in Ireland to the 

 eastern part of the " central plain," and it is impossible to 

 credit that a habitat for it could be found in the district 

 around Lough Anscaul. It does not seem probable now 



^ /. Nat., vol. xxi., pp. 183-190. Plate 3. 1912. 



2 .Other pencil notes are added later ; but all these are signed H. A. H. 

 The book appears to have passed into the hands of " H. A. H.," probably 

 subsequent to Cailwell's death. 



