sponges. 
201 
This sponge differs from S. aspinosa, Potts in its stouter skeleton- spicules, spined 
microscleres and stouter and less regular skeleton. It has no relationship to 5. sinen- 
sis, with which we formerly compared it. As it is devoid of gemmule- spicules its 
precise systematic position is a little uncertain, but as the gemmules possess a well- 
developed pneumatic layer, it seems best on the whole to place it in the subgenus 
Euspongilla. 
B. Chinese Species. 
Freshwater sponges are known from only two of the provinces of China, from 
Yunnan in the west and Kiangsu in the east. From Yunnan three species have been 
recorded, Spongilla [Euspongilla) lacustris , auct.,5. {Stratospongilla) dementis, Annan- 
dale (syn. 5. yunnanensis, id.) 3.nd Nudospongilla coggini (Annandale). From Kiangsu 
I am able, thanks largely to the assistance of the Rev. N. Gist Gee of Soochow, to 
record ten species, of which six are known only from that province . The following 
is a list of the ten species now known from Kiangsu : — 
Spongilla {Euspongilla) micron, Annan- Spongilla (Stratospongilla) stanleyi, An- 
dale. nandale. 
Spongilla {Euspongilla) semispongilla, Ephydatia meyeni (Carter). 
(Annandale). Ephydatia hogorensis, Weber. 
Spongilla (Eunapius) geei, sp. nov. Trochospongilla latouchiana, Annan- 
Spongilla {Eunapius) conifera, Annan- dale. 
dale. Trochospongilla sol, sp. nov. 
Spongilla {Stratospongilla) sinensis, An- 
nandale. 
Two {E. meyeni and T. latouchiana) of the four species found outside the pro- 
vince occur in India; E. meyeni has been found also in Sumatra and T. latouchiana in 
Burma . E. hogorensis was described from the Malay Archipelago, and S. semispongilla 
from Japan . 
Genus Spongilla, Lamarck. 
Subgenus Euspongilla, Vejdovsky. 
Spongilla micron, Annandale. 
igi6. Spongilla {Euspongilla) micron, Annandale, Journ. N. China Roy. As. Sac, XL,VII, 
p. 49. 
This Species is closely allied to 5. alba, Carter and 5. semispongilla (Annandale). 
From the former it differs in its invariably minute size, in the sub-rotulate form of 
its gemmule-spicules and in the absence of true fle sh- spicules ; from 5. semispongilla 
it may be distinguished by the entire absence of chlorophyl bodies and by its much 
more slender macroscleres. The macroscleres are always smooth but often somewhat 
abnormal in form (see figure) . There are no true flesh-spicules but immature gemmule- 
spicules often occur in considerable numbers in the parenchyma. I regret to say that 
the original description gives a totally wrong account of the measurements of the 
spicules owing to the fact that the specimen selected as the type was a mixture of two 
