773 
L ST OF MOLLUSCA OF RANGOON. 
BY 
Dk. H. Makshall. 
(A.) Fresh Water Mollusca, 
la. Melanoides tuberculata, Miiller. — (F. B. I. No. 28. liara {Stnatella} 
tuberculata). This is a common species in Rangoon. The majority of 
specimens obtainable are very small, and light coloured. Some medium 
sized specimens were obtained from the Cantonment Garden tanks and 
JIunicipal tank in Creek Street. These are very dark in colour. 
2a. Melanoides scabra, Muller. — (F. B. I. No. 60. Tiam (Flotia) scabra). 
Specimens of this mollusc were only obtained from the Roj'al Lakes. 
They are dark in colour and much decollated. 
3a. Acrostoma variabile (Benson). — (F. B. I. No. 39. Tiara {Melanoides) 
tariahilis). This is not a very common species in Rangoon. The local 
variety bears as a rule strong longitudinal ribs and is very dark in colour, 
some specimens being covered with a thick black deposit. Very occasion- 
ally somewhat lighter and more delicate specimens are obtainable and 
these are marked with two brownish bands on the last whorl. Specimens 
which are almost smooth and of a light olive colour ornamented with 
brown bands on the last whorl are sometimes brought into the market 
with prawns. I have not been able to ascertain as to where these speci- 
mens come from. 
4a. Vivipara bengalensis var ; digona (Blanford). — (F. B. I. No. 179. Vivi- 
para digona). This is a common species found in almost all tanks, ponds, 
and ditches. Very beautiful specimens are obtainable in the Kokin ^ 
Lakes. 
5a. V ivi para bengalensis var : doliaris (Gould). — (F. B. I. No. 168. Yivipara 
duliaris). Specimens which I take to be this variety do not appear to be 
anything like as common as digona. Most of the specimens obtainable 
are small. i 
6a. Vivipara keliciformis var : viridis. Reeve. — (F. B. I. No. 185. Vivipara 
(Idiopoma) helicifonnis var : viridis. Specimens which I take to be this 
variety were only found on one occasion. 
7a. Vivipara dissimilis (Muller). — (F. B. I. No. 174. Virigiai-a dissimilis). 
Specimens of a uniform green colour with spire not much produced were 
obtained. I take these to be some variety of dissimilis. 
8a. Pachylabra conica (Gray). — (F. B. I. No. 197. Fila conica). This is a 
very common species in Rangoon. Two varieties are obtainable, one 
unicoloured which is usually of a large size, the other variously banded 
with brownish bands. The banded specimens do not appear to reach the 
size of unicoloured specimens. This species is eaten by many classes of 
Natives, and many persons are employed in the trade who gather the 
Molluscs and take them round to private houses for sale. This mollusc 
along with Vivipara bengalensis, Indoplanorbis e.vustus, and Melan- 
oides tuberculata are largely collected by the Chinese duck farm owners 
for the feeding of ducks. 
9a. Limncea acuminata, (Lam.) — (F. B. I. No. 211. Limneea {Limncea) acumi- 
nata). All specimens obtainable in Rangoon appear to be dwarfed. 
Two varieties have been found ; one something like variety amygdalum, 
Troschel, and the other variety nana, Amiandale (Rec. Ind. Mus., Vol. 
XVI, Part 1, No. 6). This species is only obtainable from about October 
till the end of the year, after which it disappears. 
1 r. bengalensis \&i : digona ha.% novi been merged ia doiinris (Rec. Ind. Mus. Vol. XXII. 
Part 211, Ko. 20, p. 272.) 
