STANDEN : MOLLUSCA OF PORTSALON. 203 



Acme lineata D rap. — Dead but quite fresh specimens 



amongst rejectamenta, Portsalon. 

 Valvata piscinalis Miiller. — Common, but very young in 



both Ballymagahy and Shannagh Loughs. Some very large 



dead shells on mud of dried-up ditch, Portsalon. 

 V. cristata Miiller. — I took some very fine specimens of this 



in Ballymagahy Lough. The species is down for Donegal 



with a query in Dr. Scharff's list. 

 *Sphaerium corneum L. — Some small specimens in water- 

 holes on golf-links, Portsalon, and I found it dead in several 



dried-up ditches in the neighbourhood. 

 Pisidium fontinale Drap. — Not uncommon in water-holes 



on the golf-links, and ditches, Portsalon. 

 *P. roseum Jeff. — Very common in a fine gravel-bed on the 



west side of Ballymagahy Lough. 

 *P. pusillum Gmel. — Common in water-holes on golf-links 



and in several ditches near Portsalon, also in Ballymagahy 



Lough on sandy mud. 



Note. — By way of showing the richness of the rejectamenta, 

 and the relative proportion of species, I add a list of shells taken 

 out of one tablespoonful of the wind deposit, though to prevent 

 misconception the reader must understand that the spoonful 

 from which the above were taken, represents the result of a 

 careful sieving of at least a pint of the deposit as collected ; all 

 sand, and everything above the size of Cochlicopa, being re- 

 moved by the process : — 



3 Verligo pusilla, 



79 Fi angustior, 



2x V. pygincsa, 



47 V. siibstriata, 



3 V. alpestris, 



8 V. edentiila, 



5 V. aniivertigo, 

 30 Pupa muscorum, 



5 P. cylindracea, 



3 P. anglica, 



142 Helix pulchella, 

 98 Cochlicopa lubrica, 



4 Acme li>ieata, 



9 Hyalinia crystallina. 

 19 Carychiuiii niinimiim. 



