584 CUSHMAN: DESMIDS FROM NEWFOUNDLAND 
STAURASTRUM NANUM Wolle. (PLATE 26, FIG. 10.) 
Long. 25 y; lat. c. acul. 31 y; lat. s. acul. 22 y; lat. isthm. 8 z. 
Common in the first collection. 
STAURASTRUM CRENULATUM (Naeg.) Delp. 
Lat. c: proc. $7 x. 
A single empty cell ‘found. 
BosTon SociETy OF NATURAL Hisrory. 
Explanation of plate 26 
Fic. Cylindrocystis americana W. & G. S. West. > 600. 
Fic. Tetmemorus Brebissonti turgidus Ralfs, >< 600. 
Fic 
T. laevis (Kiitz.) Ralfs. >< 600 
T. minutus De B 600. 
Luastrum ampullaceum Ralfs. >< 600. 
£. Allenii sp. nov. > 600. 
Xanthidium armatum Bréb. >< 600. 
Micrasterias conferta Novae-terrae var. nov.  X 600. 
Cosmartum impressulum minor Turner. >< 1200, 
Staurastrum nanum Wolle. x 1200. 
a 
PRS So 8 3 
of 2 ae e Ps 
y 
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