768 
SUMMARY OF CURRENT RESEARCHES RELATING TO 
from Phialea and from Cyathicula by the multiseptated spores, Pocillum 
(1 sp.), Chlorosplenium (2 sp.), Ciboria (15 sp.), Rutstrwmia (7 sp.), 
Helotium (35 sp.), Sclerotinia (30 sp.), Dasyscypha (42 sp.), Lachnella 
(17 sp.), Laclinellula (3 sp.), Lachnum (66 sp.), and Erinella (4 sp .). 
Many new species are described. 
Part 52 completes Dr. A. Fischer’s monograph of the Phycomycetes, 
comprising 375 species, not including doubtful ones. At the conclusion 
is given a synopsis of the species classified into saprophytic and 
parasitic, and further arranged under the families to which their hosts 
belong, whether animal or vegetable. 
Myxomycetes. 
Division of Nuclei in the Mycetozoa.* — From observations made 
on a large number of species of Mycetozoa, Mr. A. Lister states that at 
the time when the swarm-cells divide, the division of the nucleus takes 
place by karyokincsis, the nuclei remaining distinct when the swarm- 
cells unite to form a plasmode. In the streaming plasmode, on the 
contrary, the nuclei appear to increase by direct division. When 
division of the protoplasm into true cells takes place, karyokinesis again 
occurs. In other words — setting aside the question of the sclerote — 
wherever cell-formation occurs in the life-history of the Mycetozoa, the 
nuclei divide by karyokinesis. 
New Myxomycetes.f — Mr. A. P. Morgan describes a number of new 
Myxomycetes from Ohio, including a new genus Calonema , belonging to 
the Trichiaceae, with the following diagnosis : — Sporanges subglobose, 
irregular, sessile, without a hvpothallus ; the wall thin, marked with 
branching veins, irregularly dehiscent. Capillitium of slender tubules, 
arising from the base of the sporange, repeatedly branched, and with 
numerous free extremities ; the surface traversed by a system of branch- 
ing veins, ending in minute veinlets, which appear as irregular rings 
and spirals. Spores subglobose, yellow. 
Protophyta. 
a. Schizopliyceae. 
New Genera of Protococcaceae.l — In an account of a collection of 
Freshwater Algae received from East India, Mr. W. B. Turner describes 
a large number of new species, chiefly desmids, and the following new 
genera of Protococcaceae : — 
Staurophanum. Frons plus minus cruciformis, normaliter 4-partita 
v. 4-lobulata, ad fines aut singula aut furcata, angulis v. non productis ; 
anguli interiores rotundati ; apicibus 2-3-dentatis v. cuspidatis, a latere 
visa lanceolata, finibus plus minus attenuatis. 
Thallodesmium. Plantula minuta (plana ?) sub-orbicularis, in stratum 
gelatinosum tenue nidulans v. libere natans ; ex cellula unica margine 
sinuata v. incisa pilis rectis brevibus instructa, medio profunde constricta, 
constituta ; massae chlorophyllaceae irregulares, sub-radiatim dispositae. 
* Journ. Linn. Soc. (Bot.), xxix. (1893) pp. 529-43 (2 pis.). 
t Journ. Cincinnati Soc. Nat. Hist., xvi. (1893) pp. 13-36 (1 pi.). 
X K. Sveusk. Vetensk. Akad. Hand!., xxv. (1892) 187 pp. and 23 pis. 
