112 Rhodora [June 
As the material from North Conway and Intervale was taken from 
ponds, which are in direct water connection with that from which 
Wood’s specimens were obtained, it is not surprising to find nearly if 
not all of his recorded species appearing from these two localities. 
Nearly all of Prof. Bailey’s species have also turned up in this 
material. As access has been had to his original notes and draw- 
ings, certain critical notes are appended to those species, as the 
published figures were as a rule poor, while the originals were care- 
ful camera drawings. 
Certain of the names and genera used by Wolle in his Desmids of 
the United States need revision and for the species touched upon 
this has been roughly indicated. In the arrangement of the genera 
the writer has followed that given in W. & G. S. West’s British 
Desmidiacez with slight differences, these last conforming more 
closely with Wille’s classification in Engler and Prantl. My thanks 
are due to Dr. O. Borge of Stockholm, Sweden, for helpful sugges- 
tions especially as to certain of the forms here published as new. 
Species new to the New England list are preceded by an asterisk. 
The abbreviations H. J. and H. C. indicate that the specimens are 
preserved in the herbarium of L. N. Johnson and of the writer 
respectively. 
GONATOZYGON DeBary. 
G. MONOTAENIUM DeBary. (G. asperum, Wolle '92: G. Radfsii 
DeBary.) Length 260 p: breadth 11 4. Pudding Pond, North 
Conway, rare! Holderness, scarce ( Wests). 
G. Brepissoni DeBary. (G. Ralfsii, Johnson '95). Length 136- 
160 p: breadth 6-8 u. Laconia ( Wests). 
G. ACULEATUM Hastings. Breadth with spines 40 p, without 
spines 20 p.  Pennichuck Pond, Nashua (Hastings). Laconia, 
frequent (Wests). Meredith, occasional (Johnson). 
SPIROTAENIA Bréb. 
S. CONDENSATA Bréb. Length 122 mw: breadth 18 q. Pudding 
Pond, North Conway, frequent ! 
MESOTAENIUM Nag. 
M. macrococcum (Kiitz.) Roy € Biss. (M. Braunii, Wolle 
192). Reported from the Flume (F. S. Collins). 
