568 Bulletin American Museum of Natural History 
[Vol. LIII 
sia, should, however nourish quite a number of peculiar forms, and their 
investigation is especially recommended to future collectors.' 
Melampus liberranus 
Lymnexa natalensis undussume 
Planorbis adowensis 
‘ bridouxianus 
sudanicus tangantkanus 
gitbonse 
avakubiensis 
costulatus 
Segmentina angusta 
&  kempt 
Bulinus forskala 
* lamellosus 
* Physopsis choziensis (Chozi R.) 
. africana var. 
a globosa 
Burnupia caffra 
7 alta 
kimiloloensis 
transvaalensis 
walkert 
i trapezoidea (?) 
Neritina glabrata 
. adansoniana 
oweniana 
*Pila chevalieri (Krebedje) | 
‘  microglypta 
CONGOeENSIS 
(a 6c 
c¢ 
66 
amplior 
leopoldvillensis 
Lanistes subcarinatus (? =intortus) 
ee CONgLCUS 
os FP OLET NUS 
nsendweensis 
a a katanganus 
antortus 
bicarinatus 
ovum var. major (?) 
adansont 
procerus lang 
s / magnus 
ellipticus 
1The following species and subspecies, 
doubtful, were omitted, our reasons for 
Lymnezxa natalensis exserta, L. anceyana, 
ovoidea, P. a. var. stanleyana, 
(typical form), Bulimus humerosus, 
Lanistes ellipticus luapulensis 
3 pyramidalis 
grauerr 
bourguignati (Malagarazi R.) 
*Viviparus kalingwisiensis (Kalungwesi 
R.) 
leopoldvillensis 
unicolor 
Bulimus kisalensis 
Lobogenes michaelis 
‘i spiralis 
Syncera hesser 
Pseudogibbula duponts 
Potamides fuscatus 
Melanoides anomala 
66 (5 
66 
* a 
6c 
66 
bukamana 
kinshassaensis 
liebrechtsz 
lang 
*f ‘  zambiensis 
nsendweensis 
Ss ‘ consobrina 
soror 
megalobasis 
wagenia 
- ‘<  tshopoicola 
kisangant 
(a9 ce congo 
bavay? 
crawshayt 
depravata 
MWETUENSIS 
NYANGWEENSIS 
Pachymelania aurita 
ee fusca 
Potadoma alutacea 
o ignobilis 
pokoensts 
liricincta 
é¢ (a4 
66 
major 
ty a walikalensis 
the oceurrncee of which in the Congo basin appears extremely 
doing so being given in the taxonomic part of this work: 
t, Planorbis sudanicus (typical form), Physopsis africana var. 
Pila speciosa, P. ovata, P. wernei, Lanistes ovum var. elatior, L. procerus 
f Cleopatra ferruginea, C. bulimoides, Egeri 
zegyptiaca, Aspatharia rubens, and Mutela epee : ee ee veiatuta 
