— 316 - 



Helicina togatula, Morelet. 



— Sphaeroidea, Pfeifïer. 



— mediana, Gassies. 

 TruDcatella conspicua, Bronn. 



EXPLICATION DES PLANCHES 



PLANCHE VII. 



1. Rhytida Beraudi, Gnssies. 



2. Rhytida subsidiali-, Gassies, var. y. 



3. Diplomplialus Grave), Dupuy. 



4. Ouagapia Raynali, Gassies. 



5. Platyrhytida 7'urneri, Pfeifïer, var. ft 



6. Planorbis Morletianus, Crosse 



7. Helicina Mondaimi. Crosse. . 



8. Hydrohia Savdsi, Crosse. 



PLANCHE VIII. 



1. Diplomphalus Seberti, Marie 



2. Charopa subacanlhinula, Crosse. 



3. Trochomorpha dictyodes, Pfeifïer, var. g. 



4. Trochomorpha dictyonina, Eathyme. 



5. Placostylus Poyensis, Kobelt, var. f}_ 



PLANCHE IX. 



1. Placostylus Layardi, Kobelt. 



2. Placostylus Layardi, Kobelt, var. ft 



3. Placostylus duplex, Gassies (type). 



4. Placostylus Monackensis, Crosse. 



PLANCHE X. 



1. Placostylus Kanalensis, Crosse, 



2. Placostylus Guesùieri, Gassies, var. S. 



3. Placostylus Scarabus, Albers, rar. p. 



4. Auricula subula, Quoy et Gaimard, var. y. 



