ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
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again at that locality until 1919. It is of rather sporadic appearance, and 
sometimes puzzling in its varieties of form. The author describes a new 
form, f. obtusa, from Pelham Bay, New York, and discusses its cytological 
structure and reproduction. Being marine, it lacks the two pulsating 
vacuoles found in fresh-water Chlamydomonas. He also describes and 
discusses Brachiomonas simplex , a new species found by him at Aalesund 
in Norway, where also he secured the rare Chlamydomonas caudata 
Wille, which also he discusses. In writing of the phylogeny of these 
genera, he objects to the intermediate position allotted to Lobomonas 
by Wille and by West, and regards that genus as a special offshoot from 
the Chlamydomonas line. A. G. 
New British and American Species of Lobomonas : A Study in 
Morphogenesis of Motile Algae. — Tracy E. Hazen {Bull. Torrey Bot. 
Club , 1922, 49, 123-40, 2 pis.). Lobomonas is a genus nearly allied to 
Chlamydomonas ; two species of it are known ; and two new species are 
now described and figured, L. pentagonia and L. rostrata — the former 
from Ham Common, Surrey, and the latter from New Jersey and 
Vermont. The second part of the paper is concerned with the morpho- 
genesis of motile algae. After a survey of the work and views of 
Harper, Perty, McClendon, D’Arcy Thompson, Jennings and others, 
upon amoeboid movement, Hazen expresses his opinion that the lobes 
and excrescences of Lobomonas , Brachiomonas and Pteromonas are the 
expression of the same non-homogeneous organization of the protoplast 
as is characteristic of Amoeba. A. G. 
Notes from the Woods Hole Laboratory. 1921. — I. F. Lew t is and 
W. R. Taylor ( Rhodora , 1921, 23, 249-56, 1 pi. and figs.). A series of 
notes on interesting algae. A Platymonas was found near New Bedford 
Harbour, U.S.A., which proved to be identical with Carteria subcordi- 
formis Wille. It will grow in fresh, brackish or sea water, and prefers 
the presence of a little organic pollution. Tracy E. Hazen has collected 
it in seven localities, has studied it carefully, and definitely transfers it 
to Platymonas. It is suggested that Platymonas is the free motile 
stage of Prasinocladus (the Palmella stage). Other notes treat of 
Asterococcus superbus , Anabsena spiroides , Bryopsis hypnoides (with 
abundance of male and female gametes), Ectocarpus Mitchellse Harv. 
var. parva , a new variety found on the carapace of a turtle. All these 
are figured. A. G. 
Researches on the Chemical Constitution of the Cell Wall of 
the Cyanophycese. — Eva Mameli (Atti 1st. Bot. Univ. Pavia , 
1920, 17, 257-64). Some hundred species belonging to 34 genera were 
examined, and yielded the following results : — 1. Cellulose is present in 
the cell wall of all the Cyanophycese, thus bringing them into uniformity 
with the chemical behaviour of the dermatoplasm of the generality of 
vegetal cells. 2. The cellulose is generally accompanied by a pectic 
substance. 3. Search for chitin gave negative results. 4. The products 
of hydrolysis of the cellulose of the Cyanophycese are pentosans and 
galactans. Thus the cell wall of the Schizophycese is in general of a 
celluloso-pectic nature. Our knowledge of the cell wall of other algse 
Y 
