NOTES ON THE LAND AND FRESHWATER MOLLUSCA OF 

 SOUTH WALES. 



By JOHN WILLIAMS VAUGHAN. 



(Read before the Society, January 13th, 1909). 



When the last edition of the " Census of the British Land and Fresh- 

 water MoUusca" was issued in 1902, very Httle seems to have been 

 known of South Wales, and with the exception of those for the 

 counties of Glamorgan and Pembroke the lists were very meagre, 

 consisting of 24 species for Breconshire, 12 only for Radnorshire, 25 

 for Carmarthenshire, and 24 for Cardiganshire. Since that time I 

 have done what I could to show that South Wales is much richer in 

 moUusca than would appear from these lists. I have done nothing 

 in Glamorganshire. In Pembrokeshire I do not think there is much 

 more to be done since the very complete list of " Tenby and Neigh- 

 bourhood Land and Freshwater Shells " was read before the Society 

 on the 14th February, 1900. I have, however, had the pleasure of 

 adding one species to this list, viz: Vertigo pygvicea^ of which I found 

 a specimen under a stone near Gumferston. My principal researches 

 have been confined to Breconshire and Radnorshire. Breconshire 

 now has 64 records, and Radnorshire 47. In Carmarthenshire I have 

 had two days' collecting at Laugharne, and also some time in the 

 neighbourhood of Llandovery. I have added 19 species to the Census. 

 In Cardiganshire my researches have been confined entirely to the 

 neighbourhood of Borth and Aberystwith, which seems to me to be 

 a very poor locality for moUusca. I have only added four species to 

 the list, making the very meagre total of 28. I hope next year to try 

 the southern part of the county, and to bring it a Httle more into line 

 with its five sister counties. I have to thank Messrs. C Oldham, F. 

 Taylor, and J. W. Taylor for their kindness in verifying my finds, and 

 also Mr. Roebuck for his assistance with the slugs. 



Breconshire and Radnorshire. 

 Arion ater (L.). — Common everywhere. 



var. brunnea Roebuck. — Near Erwood village, 

 var. aterrima Taylor. — Occurs on all the hills. 

 Arion subfuscus (Drap.). — In a wood in Crickadarn parish, and 

 the Darran Wood, Radnorshire. 



var. cinereofusca Drap, — Llaneglws Grouse Hill, Breconshire. 

 Arion hortensis F^r. — Common. 

 Arion intermedius Norm. — Fairly common under stones. 



var. grisea Roebuck. — Near Pant Llyn Pool, Gwenddwr. I 

 took a specimen of this mollusk on Llaneglws Grouse Moor, at an 



