18 Mr. W. Thompson's Catalogue of the Land and 



2. V. cristata, Mull., Gray, Man. p. 98. pi. 10. f. 115. 

 Helix cristata, Mont. p. 460. vign. 1. f. 7, 8. 

 Valvata spirorbis, Drap. p. 41. pi. i. f. 32, 33. 



This handsomely formed species is distributed over the island. The 

 Valv. Planorbis, Drap., noticed as Irish in Lond. and Edin. Phil. Mag. 

 1834, p. 300, must be erased from the list. 



Order II. Pneumonobranchiata. 



Fam. 1. Arionid^e. 



Arion, Ferus. 



1. A. ater, Gray, Man. p. 104. 



Limax ater, Linn. 

 Arion empiricorum, Fer. 



This species, the common " black snail," is abundant throughout 

 Ireland. Its varieties, A. rufus {Limax rufus, Linn.), and A. margi- 

 natus, as remarked by Mr. Templeton, likewise occur. Under a co- 

 loured drawing of the latter made by this naturalist is the remark, 

 4t common in fields about Cremorne, county Monaghan, August 4, 

 1805." The yellow variety is likewise found in the north and south 

 {Miss M. Ball). Under precisely the same circumstances of food 

 and " habitation" I have met with the varieties above-mentioned. 

 See Gray, Man. p. 105. 



2. A. hortensis, Fer. Gray, Man. p. 107. 



" Common at Cranmore (Belfast)," Templeton's MS. Coloured 

 drawings of the variety of this or the preceding species, named A. cir- 

 cumscriptus by Dr. Johnston, were made by Mr. Templeton in 1808. 

 To this I can only add, that the species is common throughout the 

 north. 



Fam. 2. Helicid^:. 



1. Limax, Fer. 



1. L. mdximus, Linn. Gray, Man. p. 112. 



L. cinereus, Drap. 



This, the common " large grey slug," is equally abundant in 

 north and south. In the stomach of the Song Thrush (Turdus mu- 

 sicus), I have frequently found the shell of this species, the Limacella 

 parma of Turton's Manual, after the animal, of which it had been 

 part, had been entirely dissolved. I have procured similarly the shells 

 of the smaller Limaces from the Blackbird (Turdus Merula). Either 

 this or the next species is accused by Miss M. Ball of making its 

 way into pantries and eating holes in bread. 



2. L.flavus, Linn. Gray, Man. p. 114. 



L. variegatus, Fer. Hist, de Moll. p. 71. pi. 5. f. 1 — 6. 



In Mr. R. Ball's collection are a number of these, which were 

 brought by him from Youghal. In the north it has occurred to 

 myself. 



