78 
SUMMARY OF CURRENT RESEARCHES RELATING TO 
also Hedwigia, Beiblatt , 1921, 62, 85). A first contribution, omitting 
the Flagellates and the Volvocales. After a short introduction the 
author gives a general discuss on on the distribution of the algae in the 
area investigated. He found that they are not scattered arbitrarily over 
the country, but follow a certain rule which is intimately connected both 
with the geognostic substratum and the chemical constituents of the 
water. Other important factors are the orographic and climatic condi- 
tions. Three geographical areas are recognized: 1. The tertiary and 
quarternary country south of Briinn. 2. The hilly palaeozoic country 
north and north-east of Briinn. 3. The archaic region of western 
Moravia belonging to the Bohemi in-Moravian plateau, embracing the 
districts of Neustadtl, Gross-Meseritsch, and Iglau. These three areas 
are described orographically and chemically, and the species and varieties 
characteristic of each are given. Two new species are described, 
Tetraedron robustum and Lauterborniella major. Critical remarks and 
measurements are appended to many of the records, which number 
455 species. E. S. G. 
Materials for the Algological Flora of the Bulgarian Coast of 
the Black Sea. — S. Petkov {Revue Acad. Bulgare Sci., 1919, 17, 
25-134, tab. and fig. ; see also Nuova Notarisia, 1921, 32, 164). A 
list of 16 Diatomacese, 3 Desmidese, 5 Chlorophyceae and a Poly sip honia , 
collected in brackish and fresh waters along the Bulgarian coast of the 
Black Sea from Douran-Koulak to Achthopolis. A. G. 
Charophyta of the Lower Headon Beds of Hordle Cliffs (South 
Hampshire). — C. Reid and J. Groves {Quart. Journ. Geol. So-., 
1921, 77, 175-92, 3 pis.). The first part of this paper deals with the 
geological beds in which the Charophyta are found. The second part 
contains descriptions of the Charophyta remains. They consist of 
numerous detached fruits, some fragments of stems and branchlets, and 
a few stem-nodes with portions of the internodes of stems and the bases 
of the branchlets attached. There were also a few bodies which are 
apparently the actual stem-nodes. In no instance was a fruit found 
attached to a branchlet, and, owing to the fact that in each deposit more 
than one type of fruit was present, it was not possible to identify any of 
the fruits with the vegetative parts to which they belong. The fruits, 
which are described, would appear to consist only of those which have 
developed a “lime-shell,” similar to that with which we are familiar in 
many existing species of Chara and in a few Tolypellse. The presence 
of the lime-shell has ensured their preservation. The oospore was found 
in a few cases only. The fruits are very diverse in shape and size, some 
of them resembling those of living species. Twelve species of Chara 
and Tolypella are identified, of which ten are new. Under “Vegetative 
Remains ” the authors deal with the stems and branchlets, a large pro- 
portion of which appear to belong to a single type. The stems consist 
of numerous short fragments, ranging in diameter from about 250 //. to 
400 g. The branchlets of these are fairly numerous, but are abo ex- 
tremely fragmentary, varying in thickness from about 170 g to 250//.. 
Both stems and branchlets of the principal type are described in d- tail, 
and short descriptions are given of the fragments of four other types 
