220 MELANIID^. 



Mr. Smith states in the P. Zool. S. for 1881, pages 277 and 

 293, that the operculum is " melanoid," but that the absence of 

 an epidermis in the species may necessitate the separation of the 

 genus from the Melaniidce. 



Genus PYRGULA, CHstofori Sf Jan. 



Consp. meth. moll. Mantissa, 1832, type P. annuJata, Jan ,- sect. Diana, 

 Clessin, Malak. BJdt. XXV, 1878, type P. tldesseana, Oodet \_)iot of 

 Misso, 1826, gen. Piscium'\, 



1. Pyrgula annulata. 



Pyrgula annulata, Crisfofori and Jan, Mantissa, 1832, Lomhardy ; var, 

 =P. helvetica, Michelin, Guerin, Mag. Conch. 1831, Lake of Geneva— 

 long. 3, diam. 1 mil. 



12 Lake Idro; ex c. P. Bouvier and C. F. Aneey, Esqrs. 

 8 Lake Garda, N. Italy; coll. Dr. H. Dobin. 



2. Pyrgula thiesseana. 



Pyrgula thiesseana, Godet, ms., Kobelt, Jahrh. V, 1878, Missolunghi — long. 

 9 mil., and Rossm. Icon., fig. 1910 ; sect. Diana. 



2 Lepanto, Greece j ex c. P. Bouvier, Esq. 



Genus MOITESSIERIA, Bourguignat. 



Monogr. Moitessieria, 1863, type Paludina simoniana, Charp., ms. 

 [Toulouse']. 



This genus and the three next are still unrepresented in the 

 Museum collection. 



Genus LHOTELLIERIA, Bourguignat. 



Bull. Soc. Toulouse, 1877, type L. letourneuxi, Bourg. ; ^Locardia, de 

 Folin, J. de C, 1880, type L. apocrypha, de Foliii [Ehone], 



Genus PALADILHIA, Bourguignat. 

 Monogr. PaladiUiia, 1865, type P. pleurofoma, Bourg. \_Montpellier']. 



