220 MELANIIDJE. 



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, Cristofori $> Jan. 



Consp. meth. moll. Mantissa, 1832, type P. annulata, Jan ; sect. Diana, 

 Clessin, MalaTc. Slat. XXV t 1878, type P. thiesseana, Godet [not of 

 Bisso, 1826, gen. Piscium]. 



1. Pyrgula annulata. 



Pyrgula annulata, Cristofori and Jan, Mantissa, 1832, Lombardy ; 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. Ancey, Esqrs. 

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



2. Pyrgula thiesseana. 



Pyrgula thiesseana, Godet, ms., Kobelt, Jahrb. V, 1878, MissolungU long. 

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



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



Genus MOITESSIERIA, Bourguignat. 



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



\_Toulouse~]. 



This genus and the three next are still unrepresented in the 

 Museum collection. 



Genus LHOTELLIERIA, Bourguignat. 



Hull. Soc. Toulouse, 1877, type L. letourneuxi, Bowrg. ; =Locardia, de 

 Folin, J. de C., 1880, type L. apocrypha, de Folin \_Rh6ne]. 



Genus PALADILHIA, Bourguignat. 

 Monogr. Paladilhia, 1865, type P. pleurotoma, Bourg. [Montpellier]. 



