November, 1907. The Irish Naturalist. 325 



" ON VITREA (HYALINIA) HIBERNICA, n. sp. 



BY A. S< KENNARD, E.G.S. 

 WITH NOTES ON THE ANATOMY BY REV. E. W. WAKE BOWEEL- 



Pirate 42. 



There has for some time been considerable difficulty as to 

 the correct name of a large species of Vitrea occurring not 

 infrequently in Ireland, and which, has been called both 

 V. cellaria Mull, and V. lucida Drap. In 1897 Mr. Lionel E- 

 Adams recorded Vitrea lucida Drap. {Hyalinia Draparnaudi 

 Beck) from MurloughBay, Co. Antrim (Irish Nat., vol. vi., pp. 

 179-183), but the following year this specific name was with- 

 drawn in favour of H cellaria Mull. He says, " In the Irish 

 Naturalist for 1897 I included Hyalinia Draparnaudi Beck, in 

 the list of species from Murlough and Rathlin Island. I now 

 wish to withdraw the species for the present, for the following 

 reasons : — In Lancashire and the Isle of Man a large form of 

 Hyalinia with a dark blue animal has been found. This also 

 occurs at Rathlin Island and at Murlough Bay. The animals 

 from Tenby (Hyali?iia Draparnaudi Beck) like those from 

 Exeter are a dark but brilliant cobalt blue, those from Mur- 

 lough are an indigo. The mantles of the Irish specimens are 

 always flecked with dark brown like normal cellaria whilst 

 the Tenby shells do not possess these. Mr. Moss says that 

 the radula and genitalia of the Lancashire, Manx, and North 

 Irish specimens are nearer to H cellaria than to H Drapar- 

 naudi. Lancashire specimens are 12-13 mm. in diameter, 

 whilst Murlough examples are 12-14 mm * A typical cellaria 

 is 10 mm. and Draparnaudi 14 mm. I am inclined to think 

 them a form of H cellaria" 1 



Mr. J. W. Taylor says, " In the west and north there is 

 apparently a larger but more ancient and weaker race of this 

 species {Hyalinia cellafia Mull.] which forms a still closer con- 

 necting link with H. hccida, from which it is often very difficult 



1 Irish Nat., vol. vii., 1898, p. 82. 



