Stelfox — List of Land and Freslmater Mollusks of Ireland. 105 



specimens collected by Mr. Phillips 

 at Cloughjordan in Nortli Tipperary 

 (fig. 43). These examples are dark 

 in colour and very much elongated, 

 resembling to a certain extent some of 

 the large continental forms of the next 

 species. 



This species has never been found on 

 any of the western or other islands, 

 although S.pfeifferi is common on nearly 

 all of them, and S. oUonga has been 

 recently taken by Mr. Phillips on the 

 Aran Islands, the only large islands on 

 which S. pfeifferi has not so far been 

 discovered. 



Succinea pfeifferi Rossmassler.^ 



Plate VII, figs. 38, 39, 41, 42, 45-47. 



Succinea. elegans, Scharff, Irish Nat., 

 p. 137, 1892. 



WD ED LD AN 

 FE TY AR DO 

 WMSL LE MO 



EM RO CV LH 

 WC NG LF WH ME 

 SQ KG KD DU 

 GL NT QG GW Wl 

 NK LK ST KK WX 

 SK MG EC WA 

 WC 



Succinea pfeifferiis, abundant through- 

 out the entire mainland, and on most of 

 the larger islands ; but what I take to be 

 the type (figs. 38, 39) appears to be 

 confined to the eastern counties. It 

 varies greatly in all characters ; and it 



' Nothing approaching the Succinea elegans of 

 Risso having been ever found in Ireland, I 

 follow Dr. Scharff (MS.) and the late William 

 Thompson in employing Rossmassler's name. 



li.I.i^PEOC., VOL. XXIX., SECT. B. 



is more than possible that under this 

 name we have in Ireland at least three or 

 four of what by some Continental autho- 

 rities would be termed " good species." 

 Forms of this shell occur which, to 

 all appearances, closely resemble the 

 following European species : — 



Succinea virescens Morelet. Frequent 

 in brackish marshes and estuaries 

 in the southern counties (fig. 45). 

 Succinea contortula Baudonor Succinea 

 schmiacheri Andreae.^ Found in 

 marshes in many parts of the 

 southern, central, and western 

 counties. The only form I have 

 ever found associated with S.putris 

 (figs. 42, 46, 47). 

 Succinea parvwla Pascal. The form 

 referred to under S. putris. 

 Common in the western and north- 

 western counties and on the western 

 i-slands. Considered a variety of 

 <S'. putris by many Englisli 

 conchologists (fig. 41). 

 As intermediate forms would appear 

 to connect all the above-mentioned 

 varieties, even in our small island, it is 

 impossible to consider them otherwise 

 than as extreme forms of a somewhat 

 polymorphic species. Specimens col- 

 lected by Dr. Scharfi at Clondalkin, 

 near Dublin, have been considered by 

 Dr. Westerlund worthy of varietal rank, 

 and described by him under the name of 

 var. reticulata West. This sliell is fre- 

 quently found in places that are dry 

 during the greater part of some years ; 

 and Mr. Phillips has suggested that 

 this fact may govern the variability of 

 the species, as specimens taken in a 

 marshy habitat are, as a general rule, 



- This form has been referred to both species 

 by different authorities. 



