( 328 ) 



Planche VI. 



Buliraus Blanchardianus .... Fig. 1 



Melania canalis 2 



— macrospira 3 



Auricula subula i 



Melampus Stuchburyi 5 



Hydrocena diaphana 6 



Physa obtusa 7 



Melampus variabilis 8 



Melanopsis Retoutiana 9 



Melania Mageni 10 



Physa Kanakina 11 



Melanopsis Deshayesiana 12 



Physa auriculata Fig. 13 



— castanea 14 



Hidrocena niaritima 15 



Neritina Lecontei 16 



— Beckii 17 



— pulligera ......... 18 



— canalis 19 



— Petitii 20 



Pupa artensis 21 



Pedipes Jouani 22 



Plecotrema Souverbiei 23 



Planche VII. 



Bulimus Souvillei Fig. 1 



Melampus Adamsianus 2 



— trifasciatus 3 



— brevis 



— triticeus 



— sciuri 



— Layardi 



— cristatus 



Melanopsis livida 



— brevis 



3 



6 

 7 

 8 

 9 

 10 



Melanopsis aperta Fig. 11 



— variegata 12 



— carinata 13 



— frustulum 14 



— neritoides 13 



Planorbis ingenuus 16 



— Montrouzieri 17 



Hydrocena Fischeri 18 



Amphibola avellana 19 



Planche VIII. 



Truncatella labiosa Fig. 



— semicostata 



Neritina rugata 



— obscurata 



— Nouletiana 



aspersa 6 



Neritina Pazi Fig. 10 



— corona-Australis 11 



Navicella sanguisuga 12 



— Hupeiana 15 



— Haustrum 14- 



— affinis 15 



Souverbiana. 



— nucleolus, typ 



— nucleolus, var. plicata. . 



7 Cyrena sublobata 16 



8 Batissa tenebrosa 17 



