1908. Phillips. — Vertigo moulinsiana^ Dupuy. 93 



The fact that V- Lilljeborgi'i^ 6\s\A.nQX.irom. V. moulinsiana 

 is quite apparent when the two are seen side by side under a 

 lens. The former is much smaller, more glossy, its whorls 

 are more tumid, and its thinner lip lacks the broad, almost 

 colourless margin of the latter. The habits of the two 

 animals also appear to be quite different, for, as has 

 been shown, V. vioiilinsiana^ although inhabiting marshes, 

 avoids during boch summer and winter anything in the 

 nature of damp or decaying matter; while the favourite, 

 if not only habitat, in this country at least, of V, Lilljeborgi is 

 among the decaj'ing roots and stems of aquatic plants cast up 

 on lake shores. V. Lilljebo^^gi is also a much more local shell, 

 having been found only in Sweden, Norway, and West of Ire- 

 land. Judged from its size, form, and habits, V. Lilljeborgi 

 would seem to be more closely related to V. aritive^tigo than 

 to K 7tiouli7isiana^ but of course the dentition of the two species 

 is entirely different (PI- 3., figs. 13-16). 



For information and assistance kindly given me in the pre- 

 paration of these notes, I desire to express my thanks to Dr. 

 R. F. Scharff, Messrs. R. Standen, J. Wilfrid Jackson, and R. 

 Welch, M.R.I.A. 



Synonymy. 



Vertigo moulinsiana, Bupuy. 



V. Charpentieri, Shtittkworth, 



V. Charpentieri, Adams. 



V. laevigata, Kokiel. 



V. moulinsiana, Dromt. 



Pupa anglica, Moqiiin-Tandon. 



P. laevigata, Pfr. 

 Vertigo Lilljeborgi, IVesterlmtd. 



Pupa desmoulinsiana, [effvcys (1855). 



Vertigo moulinsiana, leffreys. 



V. modesta, Westerltind. 



Explanation of Plate 3. 



Figs. 1-12, Vertigo moulinsiana, from various localities. 

 „ 13-14, V, Lilljeborgi. 

 „ 15-16, V. antivertigo. 



Ashburton, Cork. 



