137 
After my return to San turce; I visited on Feb ruary3 the same 
number of Utricularia plants which I had not observed the first 
time, and among these was a very rich alga-vegetation which 
presented a somewhat different character from that previously 
seen. Spirogyra and Oedogonium appeared commonly with 
M 
deae; among the last mentioned, Pediastrum and Coelastrum 
were noticed. 
in aos fifth of. February an excursion in company with Dr. 
. Britton was undertaken to Laguna Tortuguero in the 
eee of Manati on the north side of Porto Rico. On 
the way a few algae were collected on water plants in a brook at 
Candelaria, near Bayamon. The Laguna contained perfectly 
fresh water and had a very rich vegetation of phanerogams as 
ba as alga 
long the ead lay a ae that had been washed ashore and 
which evidently grew dee ater. Bet he water 
plants small flakes cacene - eset: thrix, pea ium, and 
Lyngbya were floating, and etimes Oscillatoria also s 
found, an here decay ee ; un rulina occurr In 
down to it were found Cladophora, Rhizoclonium, Spirogyra, 
Zygnema, and Oedogonium. Among the filamentous algae one 
igonema. nem 0: mi ca; 
esides Hormidium, othrix faci, species of Gloeocapsa, 
and at a few places a species of the genus Mesotaenium, which 
often appears as ee in St Rico in regions where 
there is plenty o 
