CusHMAN : Desmid flora of Nantucket 553 



Onychonema Wallich. iS6o 



* O. serratum (Bail.) Stokes. Long. c. proc. 24/1: s. proc, 

 15.5 //: lat. c. proc. 25/^: s. proc. 19/^: isthm. 3.5 /^ Wigwam 



Pond. 



Desmjdium Ag. 1824 



D. Swartzii Ag. Lat. filament 37/^. Wigwam Pond. 



Gymnozvga Ehrenb. 1840 

 G. MONILIFORMIS Ehrenb, Lat. filament 27/^. Wigw^am 



Pond. 



Boston Society of Natural History. 



