220 MELANIIDE, 
Mr. Smith states in the P. Zool. 8. 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 Melaniide. 
‘Genus PYRGULA, Cristofori § Jan. 
Consp. meth. moll. Mantissa, 1832, type P. annulata, Jan; sect. Diana, 
Clessin, Malak. Blat. XXV, 1878, type P. thiesseana, Godet [not of 
Risso, 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, Jehrb. T, 1878, Missolunghi—long, 
9 mil., and Rossm. Icon., fig. 1910 ; sect. Diana. 
2 Lepanto, Greece; 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 Folin [Rhéne}. 
Genus PALADILHIA, Bourguignat. 
Monogr, Paladilhia, 1865, type P. pleurotoma, Bourg. [.Wontpellier]. 
