FAUNA OF THE INLAND SEA OF SINGGORA. 9S 



sons. Ill January only a few Copepods and Dapliniids were taken 

 in my townets. 



Polygon. The Polyzoa observed in tlie inner lake were all true 

 freshwater forms, belonging to the cosmopolitan genera raludicella 

 (of which an interesting new species was taken at liampani), Frederi- 

 cella and riumatella. Several species of the last are represented in my 

 collection, including P. tanijamiilae Rousselet, which, as its name in- 

 dicates, was described from Central Africa and is nob uncommon in 

 Peninsular India. 



Spowjes. The only sponges (three species) found in the Tale 

 Sap belong to the cosmopolitan freshwater genus Siiomjilla, and one of 

 them cannot be separated specifically from the common European S. 

 lacustris. Dry specimens of this species were found in a field near Pak 

 Payun, where they had been left by a retreating flood. Specimens 

 of two species were found at Lampam. One of these (S. nana) I re- 

 cently described from the Chilka Lake in Orissa, while the other is 

 a particularly interesting new species of the subgenus Eanapius. So 

 far as I am aware, these are the only freshwater sponges (with the 

 exception of Ejdti/datta hlemhinijia Evans, ^ from the Province of 

 Patani) as yet found either in the Malay Peninsula or in Siam ; so 

 far as it is yet known, the aquatic fauna of these countries offers 

 a striking contrast to that of India and Burma in the poverty of its 

 Spongillidae. 



Even this summary description of the fauna of the inner lake of 

 the Tale Sap system is sufficient to show that it is in the main a true 

 lake-fauna, exhibiting its connection with the sea merely in the pre- 

 sence of a few estuirine fishes and possibly one or two molluscs of 

 marine origin. The most noteworthy of these is the Manjinella, 

 but the fact that this species is replaced in the outer lake by 

 another, may indicate that it has become a permanent inhabitant of 

 Iresh water, and possibl}' occurs in other lakes or rivers of Siam or the 

 Malay Peninsula. 



The inner lake of the Tale Sap is comparable, therefore, from 

 a biological point of view, not with marine lakes such as the Chilka 



1. Ev:ms, Quart, Jount. Micros. Set. (n. s.) vol, XLIV, pp. 71-109, 

 y.h. iiv (1901). 



VOL. II, DEC. IflO. 



