6 
know there have been only sterile plants observed here, probably 
" because the plants fruit in winter. 
HaLosaccion scopuLa Stromfelt, Meeresalgen Islands, 173; 
Om Algvegetationen vid. Islands Kuster, 29. pl. 7, f. 16; pl. 2. 
f. 1. A form agreeing very well with Stromfelt’s description and 
figure was found by me at York Island, Maine, July, 1894. In 
view of the great range of variation in Halosaccion ramentaceum, 
it is doubtful if this can be given higher rank than that of a variety. 
In my notes on N. E. Marine Algae, V., in the BuLLETIN for 
November, 1891, I mentioned Calothrix Contareniit as found at 
Revere Beach, Mass. Dr. Bornet informs me that the specimens 
from this locality were wrongly determined, and are nearer to C. 
Sasciculata, the difference from the type of the latter being chiefly 
a matter of dimensions. 
Nitella subspicata sp. nov. 
a 
By “Fe oES AGEN, 
(PLATE 253.) 
Nitella monarthrodactyla, furcata, homoeophylla, monoica, 
gymnocarpa, acuminata. 
Plants from fifteen to twenty centimetres high, diffusely 
branched ; leaves acuminate, those of sterile verticils, spreading, 
diffuse, of the fertile verticils contracted, forming somewhat dense 
heads (remotely spike-like). Fertile verticils arise from within 
the verticil of the sterile leaves on peduncles which are some- 
times very short and sometimes elongated. The. leaves are 
once | divided; terminal segments (3 or 4) one-celled, long- 
acuminate, somewhat inflated at the middle. Antheridia 
240 in diameter. Sporophydia one to three at a node of the 
leaf (usually two), 306 long from base to tip of coronula. 
Nucleus 225 long, 200 broad, with six prominent acute ridges, 
nearly black. Membrane of the spore quite smooth. 
Measurements: stem diameter, 780 to 830, leaf diameter 488, 
500 to 610; terminals diam., 400, 464 and 490. . 
Collected in Missouri by J. W. Blankinship. 
This plant is nearly related to Mitella subglomerata A. Br., 
from which it differs by its more contracted “ heads ;” its smaller 
_antheridia and odspores, as well as by the perfectly smooth _ 
