BOTANY AND ZOOLOGY OF CHINA 



191 



were numerous only during the winter time. As it seems 

 to me the heat and the rains of the summer in this district 

 retard their growth. 



Altogether in the plankton were found 92 forms, among 

 which has been discovered new forms. The list of all the 

 organisms is as follows: — 



Trachelomonas oblonga Lemm. var. suhglobosa Lemm. 

 Trachelemonas oblonga Lemm. var, granulata nov. var. 



(see Fig. 8). Lorica brown, covered with small 



rounded knobs. Lorica is of 18 microns of length. 

 Trachelomonas volvocina Ehrenb. 



Trachelomonas volvocina Ehrenb. var. punctata Skvortz. 

 Trachelomonas incerta Lemm. var. punctata Skvortz. 



(see Fig. 9). 

 Trachelomonas Swirenko Skvortz. 

 Trachelomonas sp. (see Fig. 16) a form resembling the 



type of Tr. Swirenko. 

 Trachelomonas volgensis Lemm. var. Treubei (Wolosz.) 



Lemm. 

 Trachelomonas truncata (Lemm.) nob. (=^Trachelomonas 



oblonga Lemm. var. truncata Lemm.). 



Var. punctata nov. var. (see Fig. 4). 



% 



Rd We - \ : ' 



XLVIII. — On the Winter Photoplankton of the 

 Fishponds of Foochow. 



