582 CUSHMAN: DESMIDS FROM NEWFOUNDLAND 
MESOTAENIUM ENDLICHERIANUM Naeg. 
Long. 35 4; lat. 124. 
Very common in the second bottle of material mentioned 
above. 
CyLINDROCYSTIS AMERICANA W. & G. S. West. (PLATE 26, FIG. I.) 
Long. 40; lat. 18 p. 
Although this is slightly smaller than the typical form, it has 
the same proportions and the same characteristic shape. Frequent 
in the first collection. 
CYLINDROCYSTIS sp. ? 
Long. 37.4 4; lat. 24.8 4; lat. apic. 15 p. 
Very finely but sparsely punctate, slightly constricted in the 
middle. But one specimen of this character noted. 
Penium Diaitus (Ehrenb.) Bréb. 
Long. 160-180 p; lat. 63-71 p. 
Varying somewhat in size and form, fairly common. 
PENIUM CLOSTERIOIDES Ralfs. 
Long. 98 »; lat. 29 p. 
Few of this species noticed. 
TETMEMORUS BREBISSONII TURGIDUS Ralfs. (PLATE 26, FIG. 2.) 
Long. 174-198 ; lat. 40-44 ps. 
Very common among the moss in the first collection. 
TETMEMORUS LAEvIS (Kitz.) Ralfs. (PLATE 26, FIG. 3.) 
Long. 133 4; lat. 25 p. 
Not as common as the other two species of this genus. 
TETMEMORUS MINUTUS De By. (PLATE 26, FIG. 4.) 
_ Long. 62-65 p; lat. 15-16 p. 
The commonest species in the collection. 
EUASTRUM AMPULLACEUM Ralfs. (PLATE 26, FIG. 5.) 
Long. 87»; lat. 47»; lat. lob. pol. 22 p. 
Somewhat smaller than the form usually found ; frequent. 
Euastrum Allenii sp. nov. (PLare 26, Fic. 6.) 
Long. 105 ; lat. 49 ; lat. lob. pol. 33; lat. isthm. 184 
E. submagnum, circiter duplo longius quam latum, modice CoP” 
strictum, sinu lineare: semicellulae septemlobae, lobis lateralibus 
