( 124 ) 



Planche VI. 



Bulimus Blanchardianus .... Fig. 1 



Melania canalis 2 



— macrospira 3 



Auricula subula 4 



Melampus Stuchburyi 5 



Hydrocena diaphana 6 



Physa obtusa 7 



Melampus variabilis 8 



Melanopsis Reloutiana 9 



Melania Mageni 10 



Physa Kanakina 11 



Melanopsis Deshayesiaua 12 



Physa auriculata Fig. 13 



— castanea 14 



Hidrocena raaritima. . 15 



Neritina Lecontei 16 



— Beckii 17 



— pulligera ......... 18 



— canalis 19 



— Petitii 20 



Piipa artensis 21 



Pedipes Jouani 22 



Plecotrema Souverbiei 23 



Planche VII. 



Bulimus Souvillei Fig. 1 



Melampus Âdamsianus 2 



— trifasciatus 3 



— brevis 4 



— triliceus 5 



— sciuri 6 



— Layardi 7 



— cristatus 8 



Melanopsis livida 9 



— brevis 10 



Melanopsis aperta. Fig. 11 



— variegata 12 



— carinata 13 



— frustulum 14 



— neritoides 15 



Planorbis ingenuus 16 



— Monlrouzieri 17 



Hydrocena Fischeri 18 



Amphibola avellana 19 



Planche VIII. 



Truncatella labiosa Fig. 1 



— somicostata 2 



Neritina rugata 3 



— obscurata 4 



— Nouletiana 3 



— aspersa 6 



— Souverbiana 7 



— nucleolus, typ 8 



— nucleolus, var. plicala. . . 9 



Neritina Pazi Fig. 10 



— corona-Australis 11 



Navicella sanguisuga 12 



— Hupeiana 13 



— Haustrum 14 



— affinis 15 



Cyrena sublobata 16 



Ba tissa tenebrosa 17 



