a öl a a Das Sa u a a Bl abe ya u a a ZEN > an en a. 
untergebrachten Arten und Formen nicht fehlen. Das Buch ist als ein uncent- 
behrliches Hilfsmittel bei der Bestimmung nordischer Meeresalgen zu bezeichnen. 
Turner, W. B. Algae aquae dulcis Indiae orientalis, The Fresh- 
Water Algae (principally Desmidieae) of East India. 23 Plates. 
(Kgl. Svensk. Vet.-Akad. Handl. Band. 25, no. 5, 1892.) 
Eine für die Kenntniss der tropischen Desmidiaceen hochwichtige Arbeit. 
Unter den 600 Arten sind 536 Desmidiaceen. Für viele Gattungen schlägt Ver- 
fasser eine neue Eintheilung vor. So Cylindrocystis in Cyclocystis und Clito- 
cystis, Closterium in Selenoceras, Campyloceras, Orthoceras, Stauroccras, 
Spirotaenia in Monotaenia und Polytaenia, Triploceras in Myrmechidium und 
. Bacteridium, Docidium (incl. Pleurotaenium) in Orthidium, Rutidium, Hamma- 
tidium, Oedematidium, Oontidium, Dysphincticum in Cylindrosphintium und 
Sphaerosphinetium, Cosmarium in Cyclidium, Nephridium, Pyramidium, Sphaeri- 
dium, Tetridium, Gonatidium, Teinidium, Fuastrum in Cosmariastrum, Col- 
podastrum, Amblyastrum, Actinastrum und Sect. Eucosmium (Näg.), Micrasterias 
in Holocystis, Alomocystis, Actinocystis, Schizocystis, Xanthidium in Schiza- 
canthum Lund, Holacanthum Lund, Micracanthum, Staurastrum in Schizastrum, 
Trochastrum, Hoplastrum, Cyptastrum, Cephalastrum, Hectastrum, Cylindri- 
astrum, Glyptastrum, Brachiastrum, Rutidastrum, Raphidastrum, Acanthastrum, 
Sphaerichastrum, Odontastrum, Arthrodesmus in Aplodesmus und Schizodesmus, 
Önychonema in Prionema und Colponema, Sphaerozosma in Sphaerozosma, 
Temnozosma, Oxyzosma. 
Neue Gattungen (Protococcaccae): Staurophanum, Frons plus minus cruci- 
formis, normaliter 4-partita, vel 4-lobulata, ad fines aut singula aut furcata, 
angulis vel non productis; anguli interiores rotundati; apicibus 2—3 dentatis 
vel cuspidatis; a latere visa lanceolata, finibus plus minus attenuatis. S. cru- 
ciatum (Wall.) Turn., S. pusillum (Wall.) Turn. 
Thallodesmium, Plantula minuta (plana?) suborbicularis, in stratum gela- 
tinosum tenue nidulans vel libere natans; ex cellula unica margine sinuata vel 
incisa pilis rectis brevibus instructa, medio profunde constricta, constituta. 
Massae chlorophyllaceae irregulares, subradiatim dispositae. T. Wallichianum Turn. 
Neue Arten etc.: Tetrapedia Wallichiana, Sphaerozyga Nordstedtii Turn., 
Mesotaenium giganteum Turn., Cylindrocystis minutissima Turn., C. depressa 
Turn., C. ovalis Turn., Penium sublamellosum Turn., P. navigium Turn., P. bis- 
porum Turn., P. lanceolatum Turn., P. simplex Turn., P. polymorphum Perty 
f. obesum Turn., P. rotundum Turn., P. Digitus Breb. f. rectum Turn., P. ob- 
longum de By. f. majus Turn., Closterium acerosum Ehr. f. attenuatum Turn., C. 
Wittrockianum Turn., C. Wallichii Turn., C. nematodes Josh. 3 proboscideum 
Turn., C. suberassum Turn., C. truncatum Turn., C. Khasianum Turn., Gona- 
tozygon Ralfsii Bar. f. laeve Turn., f. muricatum Turn., f. depauperatum Turn., 
f. crassum Turn., G. Brebissonii Bar. f. gracillimum Turn., G. leiodermum Turn., 
G. reticulatum Turn., G. pilosum Wolle f. minus Turn., f. evolutum Turn., Trip- 
loceras gracile Bail. f. elongatum Turn., f. gracillimum Turn., f. quadrilobatum Turn., * 
subsp. bilobatum Turn., subsp. bidentatum Nordst. f. depauperatum Turn., 
T. abbreviatum Turn., Docidium mammillatum Turn.,D. perlaeve Turn., D. robus- 
tum Turn., D. elatum Turn., D. quantillum Turn., D. aequale Turn., D. cylin- 
dricum Turn., D. polymorphum Turn., D. rhomphaeum Turn., D. longiusculum 
Turn., D. subcoronulatum Turn., D. Wallichianum Turn., D. eugeneum Turn,, 
D. bengalense Turn., D. gloriosum Turn., D. regale Turn., D. sceptrum Roy f. 
punctata Turn., D. orientale Turn., D. excelsum Turn., D. Ehrenbergii Ralfs 
3 tumidum Turn., D. maculatum Turn., D. conjunctum, D. cristatum, D. trunca- 
