Sponges. 207 
C. Malayan Species. 
The only freshwater sponge hitherto recorded from the Malay Peninsula is Ephy- 
datia blembingia,' Evans from I^egeh in the interior of the Siamese Peninsular province 
of Patani. No species has yet been found in the Federated Malay States or the 
Straits Settlements. It is improbable that the Spongillidae are entirely absent from 
the southern parts of the Peninsula, but Dr. Evans found only one species in Peninsu- 
lar Siam in 1899, Mr. Robinson and I only a few indeterminate specimens in 1901-1902, 
and I failed to find any at all in apparently favourable localities at Penang and Singa- 
pore in 1915 and 1916. There can be no doubt, therefore, that in most parts of Malaya, 
as in Ceylon,' some unknown obstacle to the growth of sponges is wide-spread in fresh 
water. In the basin of the inner lake of the Tale Sap I found specimens of three species, 
all of which were, however, scarce. Four species are, therefore, now known to occur 
in the eastern Peninsular provinces of Siam. 
List of Species of Malay Peninsula : — 
Spongilla {Euspongilla) lacustris, auct. Spongilla [Eimapius) potamolepis, sp. 
nov. 
Spongilla {Euspongilla) nana, Annandale. Ephydatia blembingia, Evans. 
The first of these sponges is of course cosmopolitan, the second had been found 
hitherto only in brackish water in the Chilka Lake on the east coast of India, the 
third is a very distinct new species, and the fourth is known only from a single small 
pool (a deserted gold-mine) in Peninsular Siam. 5. nana is, however, closely allied to 
S. alba, the range of which extends from India to Egypt, while E. blembingia is by no 
means remotely related to E. bogorensis,^ Weber, recorded from Java, Celebes and 
northern China. 
Family SPONGILLIDAE. 
Genus Spongilla, Lamarck. 
Subgenus Euspongilla, Vejdovsky. 
Spongilla lacustris, auctorum, 
(Plate II, fig. 4.) 
igio. Spongilla {Euspongilla) lacustris, Aiiuandale, Rec. Ind. Mus., V, p. 197. 
1915. Spongilla lacustris, id., Mem. Ind. Mus., V, p. 26. 
1916. Spongilla lacustris, Annandale and Kawanmra, op. ciL, p. 3, pi. i, figs 1-3. 
If we include in this species the forms I have described under the name prolife- 
yens and reticulata it is evidently as wide-spread in Eastern Asia as it is in the Holarc- 
tic Zone. Kawamura and I (1916) have recently figured the forms it assumes in Lake 
Biwa in Japan and I have already recorded (1910) its occurrence in Western China. 
Specimens from the Tale Sap in Peninsular Siam, though they possess certain peculiar 
characters, must also be assigned provisionally to the species. 
' Evans, Quart. Joiirn. Microsc. Set. London, XL,IV, p. 8i (1901). 
* Annandale, Spolia Zeylanica, VIII, p. 133 (1912). 
3 Weber, Zonl. Ergebn. Res. Neid. Ost.-Ind., If p. 33 (1890). 
