122 Mr. W. Thompson’s Catalogue of the Land and 
Potamogeton, &c., in the drains of the bog-meadows near Belfast.” 
Between the fourth and fifth locks of the Lagan canal, a few miles 
from this town, I have, at the end of September, procured many 
specimens, all of which were on the under side of the leaves of the 
yellow water-lily (Nuphar lutea) and great water-plantain (Alisma 
Plantago)—Pond in the demesne at Moira, county Down, Mr. 
Hyndman—Near Limerick, Mr. W. H. Harvey—Beechwood, near 
Portmarnock, county Dublin, Mr. T. W. Warren—Glasnevin Bo- 
tanic Garden, Dublin, Dr. Coulter—Finnoe, county Tipperary, Mr. 
Edward Waller. 
3. Puysa, Drap. 
1. P. fontinalis, Drap. p. 54. pl. 3. f. 8,9; Gray, Man. p. 251. pl. 
9. f..110; Turt. Man. p. 127. f..110, 
Bulla fontinalis, Mont. p. 226. 
Is common, and generally distributed over Ireland, occurring on 
aquatic plants in stagnant and gently flowing water. It is subject 
to considerable variety. 
2. P. hypnorum, Drap. p. 55. pl. 8. f. 12,13; Turt. Man. p. 128. 
f. 113. | 
Aplexus hypnorum, Flem.; Gray, Man. p. 255. pl. 9. f. 118. 
Bulla hypnorum, Mont. p. 228. 
Although much less common than P. fontinalis, is generally dif- 
fused over the island, and found as frequently in very shallow, as in 
deep water. 
4, Pranorsis, Muller. 
1. P. corneus, Drap. p. 43. pl. 1. f. 42—44; Gray, Man. p. 258. 
pl. 8. f. 95; Turt. Man. p. 112. f. 95. 
Helix cornea, Mont. p. 448. 
Has been found only within a very limited portion of the island. 
It still prevails in the locality recorded by Capt. Brown—near May- 
nooth, in the county of Kildare. From about Naas in the same 
county I have been supplied with specimens by Mr. R. Ball; and 
by the Rev. B. J. Clarke, with some obtained by him near Lea Castle, 
Queen’s county. 
2. Planorbis albus, Mull. Gray, Man. p. 259. pl. 8. f. 97 ; Turt. 
Man. p. 114. f. 97. 
P. hispidus, Drap. p. 43. pl. 1. f. 45—47. 
Helix alba, Mont. p. 459. t. 25. f. 7. 
Prevails generally over Ireland. Specimens of P. glaber, Jeffreys, 
which I owe to the kindness of their describer, seem to me (as to 
Mr. Alder) identical with P. albus. 
3. Planorbis levis, Alder. Gray, Man. p. 261. pl. 12. f. 148. 
Is found in the north-east of the island. Early in the winter of 
1832 I obtained a number of this species on aquatic plants (espe- 
cially Callitriche aquatica), with P. imbricatus, in a small pond at 
