1908. i WKI.CH. — Byihinia Leachii. 3 



did not find a single specimen on the other water-plants, 

 though they swarmed with other species, especially Physa 

 fojitinalis ; I never saw this latter so common anywhere 

 before, but only half-grown of course at that time of year. 



A few weeks after this Mr. Phillips wrote again that he had 

 visited Graiguenamanagh, in Co. Kilkern}', and Tinnahinch, 

 in Co. Carlow, and had obtained specimens in the River 

 Barrow on both sides. This gives records for six counties, 

 and not onh' from localities fairly close together, but from 

 stations widely separated. I think this should dispose of the 

 question often raised, when a local species is found in a new 

 locality — one, too, that is supposed to have been well worked in 

 the past — that it may have been introduced. It is true that 

 the Grand Canal discharges into the River Barrow at Athy, 

 but Tinnahinch is thirty-six miles lower down, and that is a 

 long way ; apart from the fact that the localities on the canal 

 itself and its Mountmellick branch are spread along a distance 

 of over a hundred miles in addition. 



The centre of distribution in Ireland for B. Leachii is also 

 that for Planorbis conieus, but the latter is more local. In 

 England, however, they have almost the same range as in 

 Ireland — a south-eastern one ; a glance at the map (Plate i) 

 will show that they likely have an even greater similarity of 

 ransfe than is there given from the records we now have. In 

 Ireland P. cornetis so far has only been found in about eight 

 localities along an irregular line, from near Maynooth in 

 north-east Kildare, to Mountrath in central Queen's County, 

 via Naas, Monasterevan, Lea Castle, Portarlington, La 

 Bergerie, and Graigavern. 



In an interleaved copy I possess of Thompson's '' Catalogue 

 of the Land and Fresh Water MoUusca of Ireland,"^ which 

 belonged to his friend Robert Callwell, of Dublin (Callweirs 

 book-plate is in it), a former Secretary of the Royal Irish 

 Academy, I see a MS. note opposite P. comeiis on page 122 — 

 *' P. Cornells, Lough Miscaul, west side of Cahirconree Moun- 

 tain, specimen obtained from William Andrews, June, 1841." 

 This is in North Kerr}^ a very out-of-the-way place in the 

 Slieve Mish range, and needs verification. I think it better 

 to mention it on the chance that some conchologist may be 



^ Ann. and Mag. Nat. Hist.y Sept., 1840. 



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