136 Keecords of the Indian Museum. VOL. Wile 
er a EE TT 
3 | 
; ° 
= } Sa ae 
fe) + 2 Gels RE 
fe} G o ! & ° 
% a = Q = 
i Sy = mh Noll 
Sci lieeetaatseo]l) Meylcee 
3 E me a = 
= 4 g i 2 
3 a bose pom es 
= Zz 6a D Z 
PORIFERA— 
Epydatia fluviatilis Cc + + + 
Spongilla cartert Be 50 ae as a c 
Spongilla cinerea ox o¢ <° + 
Spongilla lacustris subsp. reticulata 
Stvatospongilla bombayensts var. Pneumatica 
POLYZOA— 
Lophopodella carteri a0 5 2h c c & 
Fredericella indica a Ae te + Cc 
Plumatella diffusa Sc oa |) op + 
Plumateila allmani a 
Plumatella emarginata R R | 
Plumatel/a tanganytkae ke a R 
Stolella himalayana R | 
[C = common; + = present ; R = rare. | 
Imperfect as the above observations are, the following general 
conclusions as regards the fauna of the Kumaon lakes may be 
stated with some confidence :— 
1. The zoo-plankton (more particularly the smaller crustacea) 
is, at any rate in the month of May, much more 
abundant in the small pools in the neighbourhood of the 
lakes than in the lakes themselves; this is also the case 
as regards aquatic insects. 
2. Sponges and polyzoa are remarkably abundant in most of 
the lakes, but no specimens of the latter group were 
taken in Naukuchia Tal. 
3. Both sponges and polyzoa, with a few exceptions (¢.g. 
Stolella himalayana), contain numerous resting repro- 
ductive bodies in May. This agrees with what occurs 
in the plains of India, except that the production of 
these bodies is usually completed and the vegetative part 
of the organism has decayed about a month or six 
weeks earlier. It is very different from what occurs 
in European lakes, in which the resting reproductive 
bodies are usually found at the approach of winter. 
4. Mollusca such as Limnaea and Planorbis reach a larger 
size in the small pools in the vicinity of the lakes 
than in the lakes themselves. 
5. No species of Caridea occurs in the lakes. Decapoda 
are represented solely by two species of Potamon (s. s.). 
