126 



METROPOLITAN PAKK FLORA. 



N. mucronata, A. Br. 



B B, in the brook. 



C. fragilis, Desv. 

 BB, upper pond. 



CHARA, L. 



Division II. ALG^E. t 

 (By F. S. Collins.) 



MYXOPHYCE/E. 



CLATHRQCYSTIS, Henfrey. 



C. aeruginosa, Henfrey. 



M, forming a floating scum on Middle Reservoir. 



CCELOSPH^ERIUM, Naeg. 



C. Kuetzingianum, Naeg. 



M, scattered, or as a scum, on Spot Pond. 



GLGEOCAPSA, Naeg. 



O. Magma (Brel).), Kuetz. 



M, forming a dark purplish slimy coating on wet rocks 

 throughout ; not uncommon, but usually in small quantity. 



Q. polydermatica, Kuetz. 



M, on dripping rocks, Cascade. Determination somewhat 

 uncertain, as with many species of this genus. 



SCHIZOTHRIX, Kuetz. 

 S. lacustris, A. Br., var. casspitosa, Gomont. 

 M, on stones along the margin of Spot Pond. 



S. Muelleri, Naeg. 



If, forming a black coating on wet rocks ; easily stripped off 

 in sheets of considerable size. 



j-The specimens on which this list is founded are in the herbarium 

 of Mr. F. S. Collins. 



