1912] Klugh,— Algae of a Marshy Pond 113 
of the path," Malden [now Melrose]. (Wm. Boott, June 11, 1863), 
also Malden [probably Melrose] (Wm. Boott, June 6, 1853); 
Arlington (Wm. Boott, June 6, 1853); dry woods, Ponkapaug, Ran- 
dolph (J. R. Churchill, June 26, 1897). See Ruopona xii. 187, 1910. 
C. H. KNOWLTON 
S. F. BLAKE 
J. A. CUSHMAN | 
WALTER DEANE 
| Committee 
on 
Local Flora. 
THE ALGAE OF A MARSHY POND. 
By A. B. KruaHg, M. A. 
On Barriefield Common near Kingston, Ontario, is a clay-bottomed 
marshy pond, whose algal flora is worthy of record because of its 
richness. This pond is only about 20 yards in diameter and is about 
21 feet deep in the centre. The richness of this pond appears to me 
to be due to two causes; firstly that the pond never completely dries 
up, and I have it on the authority of Dr. Knight that during his long 
residence in Kingston he has never known it to be dry, and secondly 
that being shallow the water becomes warm during the summer. 
All the species mentioned below were collected either on July 21st 
or July 23rd, 1911. On the first occasion only one vial of material 
was collected, but on finding it so rich I returned on the 23rd and 
secured four more vials of material. 
I wish here to thank Mr. F. S. Collins for his careful examination 
of such material from this pond as I sent him. 
The species listed do not represent the entire algal flora of this pond 
as I found many species which were not in fruit and consequently not 
determinable with certainty. 
The species marked with an asterisk are those which are here 
recorded from Canada for the first time. 
