STELFOX : ON PISIDIUM GASSIESIANUM, DUPUY. 53 



Woodward as P. personatum, Malm, 1855. Although they have 

 priority over Malm's name, I do not suggest at the moment that 

 either of these names — P. gassiesianicm, Dupuy, or P. limosum, 

 Gassies — should replace P. personatum, Malm. To do so would, 

 I think, be to bring in what could only be a temporary name, as I 

 have evidence, though not yet conclusive evidence, of a still older 

 name, which eventually may have to be employed for this well- 

 marked species. 



The P. gassiesianum of Gassies, and many other authors, has, of 

 course, been rightly referred to the P. milium of Held, with which 

 also is synonymous the P. pulchellum var. ^ of Jenyns, the P, 

 tetragonum of Normand, the P. arcceforme of Malm, and the P. 

 roseum of Jeffreys. 



Bibliography. 



(1) D. Dupuy : " Catalogus extramarinorum Galliae Testa- 

 ceorum." Auch and Paris, 15th February, 1849. 



(2) J. B. Gassies : " Tableau methodique et descriptif des 

 Mollusques terrestres et d'eaa douce de I'Agenais." Paris and 

 Augen, March, 1849. 



(3) D. Dupuy : " Histoire Naturelle des MoUusques terrestres 

 et d'eau douce qui vivent en France." The part dealing with the 

 genus Pisidium appeared in June, 1852. 



(4) J. B. Gassies : " Eectifications de quelqaes synonymies dans 

 le genre Pisidium, Pfeiffer." Journ. de Conchyl., pp. 140-148, 1856. 



(5) A Baudon : " Essai monographique sur les Pisidies 

 Fran9aises." Mem. Soc. Acad. Oise, Beauvais, Tom. iii, 1857, 

 pp. 315-67. 



(6) A. Baudon : '' Notes sur les Pisidium Recluzianum, Bourg. 

 et Gassiesianum, Dup." Journ. de Conchyl,, vol. viii, I860, 

 pp. 179-180. 



