COLLECTED IN THE SOUTH ORKNEYS. c 
p. 314); subsequently Wille* endeavoured to identify Splierocystis 
Schroeteri with Glæocoecus mucosus t, a view that was opposed by Chodat 
in a later: paper $, mainly on the grounds of the marked difference in 
size of the colonies in the two genera and the absence of cilia in his form. 
There seems, however, to be some evidence for the synonymy of the two 
genera, although the species are not necessarily identical ; for the present 
they are probably best kept distinct. Chodat failed to observe the cilia 
on the cells embedded in mucilage, stating definitely “ pas de pseudocils ” ; 
Wille does not say whether he observed them, although, as he makes no 
negative statement, it is to be presumed that he did $. Wille|| describes as 
especially charaeteristie a clear space having the shape of an inverted funnel 
(“verkehrt trichterfórmiger Raum”) at the front end of the cell. This, I 
believe, coincides with the colourless area beneath the beak in the cells of the 
yellow snow form, although my material was not sufficiently well preserved to 
enable me to make out its exact shape. Apart from this, however, the 
Antarctic form agrees also in other respects with the descriptions of A. Braun, 
Chodat, and Wille. Chodat’s fig. 53 В (* Algues vertes de la Suisse?) very 
much resembles the normal colonies above described, although all the cells 
are generally not so spherical as his figure shows them. His fig. 53 D 
(cf. also Wille, in Engler-Prantl, loc. cif. fig. 5 D) shows a similar subdivision 
of the cell-contents into a number of small parts, as in text-fig., G, p. 525; in 
my material, however, the membrane of the mother-cell always remained intact 
till division was eomplete **, and the Schizochlamys-like stages figured and 
deseribed by Chodat were not observed. The most noticeable points of 
difference between the yellow snow form and Braun’s and Wille’s Glwococeus 
lie in the size of the colonies and possibly in the length of the cilia, which 
are stated to be very long in the latter form, although those which I believe 
to have observed were invariably rather short. 
There can be no doubt that the three types of colonies found in the yellow 
* Wille, * Algologische Notizen, XII. Über Gleococcus mucosus, A. Br.," in Nyt Mag. 
f. Naturvid, xli. 1903, pp. 168-166. 
+ Cf. A. Braun, ‘ Betrachtungen über die Erscheinung der Verjüngung in der Natur, 
1851, p. 169 (Engl. transl. by A. Henfrey, 1353, p. 159) ; also A. Braun, * Über Chytridium, 
ete.” Abhandl. kgl. Ak, d. Wiss, Berlin, 1855, pl. v. figs. 5-20. 
f “ Quelques points de nomenclature algologique, 1. Spherocystis, Chod., ou Gleococcus, 
A. Braun ?,” in Bull. Herb. Boissier, 2e sér. iv. 1904, р. 233. 
$ There is also no mention of the cilia in Wille's description of Glwococcus in Engler u. 
Prantl, Die natürl. Pflanzenfam. Nachtr. 2. Teil I. Abt. 2 (1909), p. 15. 
|| Wille, Zoe. cif. p. 165. This space is here, probably as a result of a misprint, described 
as occurring in the back part of the cell (“im hinteren Teile der Zelle "); ef. however, fig. 54 
(р. 19) in Engler-Prantl, (ос. cit. 
< An oval cell is, however, shown iu the lower part of the colony. 
** In one or two cases the membrane of the mother-cell was pronouncedly thickened, 
appearing gelatinous and stratified. 
