Unio affinus, . 
“«  Barrattii, 
“«  buxeus, . 
“  Clarkianus, 
“  eoncavus, 
“© Cuvierianus, . 
“© decoratus, 
«« Floridensis, 
“© Forbesianus, 
“ fraternus, 
“© Gibbesianus, 
“ hebes, 
“« Hanleyianus, . 
“* ineptus, . 
“ Tngallsianus, . 
“«  Keinerianus, . 
*«  Kleinianus, 
‘© Vamarckianus, 
“« Lazarus, 
“ Juridus, 
“ merus, . 
“© Moussonianus, 
“  nigellus, 
“  nigerrimus, 
“« nigrinus, 
“  nux, 2 
«  Oregonensis, 
“«  perstriatus, 
“ placitus, 
“  Powellii, 
“«  Prevostianus, 
“*  proximus, 
“ pygmeus, 
«  Reeveianus, 
“  rufusculus, 
SYSTEMATIC INDEX. 
Page 
27 
12 
il) 
29 
16 
19 
13 
30 
20 
19 
10 
23 
35 
17 
38 
37 
21 
22 
15 
29 
16 
24 
39 
24 
40 
39 
31 
11 
35 
26 
25 
27 
18 
28 
14 
Unio Rumphianus, . 
sagittiformis, . 
satur, . ° 
sordidus, ; 
Stewardsonii, . 
“cc 
“a 
Anodonta 
“ce 
“cc 
succissus, 
Troschelianus, 
Tuomeyi,  . 
Whiteianus, . 
Arkansensis, 
Californiensis, 
denigrata, 
Linneana, . 
oblita, 
opaca, 5 
Schréteriana, 
Schafferiana, 
tortilis, 
Trautwiniana, 
virens, 
Wheatleyi, 
Basistoma Edwardsii, . 
Melania Brumbyi, 
“ 
Clarkii, . 
furva, 
gibbosa, . 
oblita, 
oppugnata, 
perstriata, ‘. 
pinguis, . . 
Saffordii, 
sculptilis, 
Sellersiana, 
Helix Le Contii, 
Page 
