160 Rhodora [SEPTEMBER 
in a year in which the spring is late and the summer not warmer 
than the average few or none may appear. ‘The past summer would 
seem to have been an ideal one for these plants, the excess of tempera- 
ture above the normal for the year being about 400° at Boston on the 
first of August. The writer had an opportunity in July to observe 
two stations, not previously recorded in this respect, and the following 
notes may have some interest. 
Along the New England coast as far north as Portland, Maine, salt 
marshes form quite a considerable portion of the shore, but beyond 
Portland they are less common. At Stover's Point in South Harpswell 
is a small salt marsh, separated from Harpswell Sound by a ridge of 
stones and gravel, through which there is a quite narrow and shallow 
opening. Except at spring tides the change of level in the numerous 
shallow pools of various size that are scattered through the marsh is 
slight, and the greater part of the water remains from one tide to 
another. In the hot days of last July the water in these pools was 
almost unpleasantly warm to the hand. ‘The felty mass of algae, usual 
in such places, covered the smaller pools, and much of the surface 
of the larger pools. The composition of this mass was the common 
warm water combination, Cladophora expansa (Mert.) Kütz., Rhizoclo- 
nium riparium (Roth) Harv., Lyngbya aestuarii (Mert.) Liebm., 
L. confervoides Ag., Enteromorpha intestinalis (L.) Link, E. crinita 
(Roth) J. Ag., E. Hopkirkii McCalla, Ilea fulvescens (Ag.) J. Ag., 
and in less quantity Pleurocapsa fuliginosa Hauck, Calothrix con- 
fervicola (Dillw.) Ag., C. scopulorum (Web. & Mohr) Ag., C. aerugi- 
nea (Kütz.) Thuret. Palmellococcus marinus Collins, described from 
material collected here in 1906, was present this year, but in less quan- 
tity; and there was considerable of two blue-green algae, usually found 
only in fresh water, Nostoc sphaericum Vauch. and Gomphosphaeria 
aponina Kütz. 
In the largest pool were floating many fragments of algae, naturally 
growing in exposed places, the same as are found washed up all along 
the shore; but in this warm water they had assumed a quite different 
appearance. Chondrus crispus (L.) Stack. was abundant, and the 
fronds had continued to grow with a luxuriance quite unknown before; 
fronds two or three dm. long were not uncommon, broad and richly 
branched, often with proliferous growths; the color pale red or yellow; 
evidently the environment was much to their liking. Common also 
were floating fronds of Ahnfeltia plicata (Furn.) Fries, but all were 
