92 SUMMARY OF CURRENT RESEARCHES RELATING TO 
tion of the filament sometimes takes place into two or more pieces, 
which may be compared to the hormogones of the Pliycockromaceae. 
Chlorocystis. — Under the name Chlorocystis Sarcophyci sp. n., Miss 
F. C. Whitting * * * § describes a new endophytic alga which causes malform- 
ations in the frond of Sarcophycus potatorum. The endophytic cells 
produce large numbers of zoospores, sometimes more than 100 in each 
cell. Chlorocystis is nearly allied to Chlorochytrium, but differs in the 
zoospores being formed by free-cell-formation. 
M. E. De Wildeman f has studied the structure of Chlorocystis Cohnii 
parasitic on a Schizonema. In its form and mode of growth it recalls 
certain Chytridiacese, and the author considers it probable that some 
genera included in this family of Fungi are descended from Algae allied 
to Chlorocystis, which have lost their chlorophyll in acquiring a parasitic 
habit. 
Chlamydomonadinese.l — Herr R. Franze proposes to retain in this 
family only 5 out of the 17 genera at present placed in it, viz. Chlamy- 
domonas, Sphserella, Chlorogonium, Corbiera , and Carteria ; of which Chlo- 
rogonium forms a group by itself and the other four genera a second 
group. Pithiscus is united with Carteria; Polytoma , Hymenomonas , 
and Spondylomorum are referred to other groups of Flagellatae ; and 
Polyblepharides, Pyramimonas, and Chloraster are placed under the 
Polyblepharidese. Chlorangium and Pliysocytium constitute a connecting 
link between this family and the Tetrasporeae. The Cblamydomona- 
dinese have probably developed out of the Tetrasporeae, and lead in one 
direction to the Yolvocineae, in another to the Conjugatae. 
Fungi. 
Saprophytic Fungus becoming Parasitic.§ — Herr H. Zukal records 
a remarkable instance of a sudden change of habit from saprophytic to 
parasitic, in the case of a fungus Sordaria fimicola. This species and 
S. bombardoides were both cultivated on hare’s dung ; when some indi- 
viduals of the former species attacked the latter, becoming parasitic on 
the peritheces, and completely destroying them. This was not for want 
of their ordinary nutriment, but apparently from preference. 
Fungus growing in a saturated solution of salt.|| — Herr H. Zukal 
records an instance of a fungus, Halobyssus moniliformis , growing in a 
saturated solution of sodium chloride, and producing conids or chlamydo- 
spores. It would appear as if the protoplasm of the fungus exercised 
a greater attractive force over water than does sodium chloride. 
New Genera of Fungi.lF — Herr H. Zukal describes the following 
new genera of Fungi : — 
Cleistotheca (Perisporiacese). Peritheces without an ostiole, more 
or less spherical, single or in groups, but not confluent, black, opaque, 
* Phycol. Mem. (Murray) ii. (1893) pp. 41-6 (8 figs.). 
f Bull. Soc. Beige Micr., xix. (1893) pp. 140-4. 
% SB. Bot. Fachver. K. Ungar. Gesell. Naturwiss., Dec. 14, 1892. See Bot. 
Centralbl., lv. (1893) p. 392. 
§ Oesterr. Bot. Zeitschr., xliii. (1893) pp. 277-9 (3 figs.). 
1| Tom. cit., pp. 279-81 (1 fig.). 
\ Oesterr. Bot. Zeitschr., xliii. (1893) pp. 160-6, 211-15, 241-7 (2 pis.). 
