41 Glanconome Curtus Nobis 
APP. 
42 Cyclas Appendiculata p. 91 







43 Lacustris p. 89 
44 Cinerea p. 91 
45 Fontinalis p. 90 
46 Nitida p. 90 
47 Obtusalis p. 90 
48 Partumeia p. 91 
49 Elegans p. 91 
50 Cyrena Turgida p. 93 









51 Sordida Nobis, are. 
52 Placens Nobis, app 
ao Oblonga p. 94 
j4 Cyprinoides Quoy 
p-. 93 
55 Rotundata p. 93 
56 Carolinensis p. 93 
57 Australis p. 94 
58 Woodiana p. 92 
59 Vanikorensis p. 94 
60 ~———  Philippinarun 
Nobis arr. 
10 


PLATE XV. 
1 Cyrena Sumatrensis p. 94 
(>) 
~ 
Tenebrosa APP. 

3 Obesa apr. 

4 Cyrenoidea Dupontia Arr. 

5 Cumingil APp. 
6 Oblonga App. 

7 Cytherea Cor app 












8 Meretrix p. 96 
9 Petechialis p. 96 
10 Zonaria p. 96 
11 Graphica p. 96 
12 Lilacina p. 98 
13 Tigrina p. 100 
14 Pannosa p. 105 
15 Argentina p. 105 
16 Bicolor p. 104 
17 Floridella p. 105 
18 Effossa p. 109 
19 Excavata p. 109 
20 Avrantia Ape. 

