ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
239 
commencement of the Ph®ophyce® by Herr F. R. Kjellman. The 
following are among the more important of the details. 
The Conjugate are arranged under the three classes Desmidiace®, 
Zygnemace®, and Mesocarpace®. The Desmidiace® are divided into 
3i genera ; the genera of Zyguemace® are Zygnema, Spirogyra, Debarya, 
( ylyptosperma ), and Zygogonium ; of Mesocarpe®, Mougeotia and Gonato- 
nemn. 
The Chlorophvce® are also divided into three classes, Protococ- 
coide®, Confervoide®, and Siphone® ; and these again into 25 families. 
The Protococcoide® include the six families Volvocace®, Tetrasporace®, 
Chlorosph®race®, Pleurococcace®, Protococcace®, aud Hydrodictyace® ; 
the Volvocace® are again divided into Chlamydomonade®, Phacote®, 
and Volvoce®, the Protococcace® into Endosph®re®, Halosph®re®, 
and Characie®. Several generally accepted genera are suppressed, somo 
being regarded as states of other Chlorophyce®, e. g. Protococcus, 
Palmella , and Gloeocystis, others as belonging to other groups ; thus 
Porpliyridium is placed in the Phycochromacea, Hydrurus in the 
Ph®ophyce® or Flagellata. 
The Confervoide® are classified into those genera in which tho 
vegetative cells have only one nucleus, and those in which they have 
more than one ; and then into those which produce zygosperms and 
those which produce oosperms. Proluderma and Prasiola are treated 
as doubtful Ulvace®. The Ch®tophorace® are divided into Ch®tophore®, 
Chroolepide®, and Ph®othamnie®. Tho Mycoideace® are made up of 
the genera Chsetopeltis, Pringsheimia, Dermatophyton, Phycopeltis, and 
Mycoidea ; Pliyllactidium belongs [tartly to Stigeoclonium, partly to 
Chsetopeltis. Pithophora and Spongocladia are included among Clado- 
phorace® ; Conferva aud Microspora under Ulotrichace®. 
Under the Siphone®, Phyllosiplionace® ( Phyllosiphon Arisari ) forms 
a distinct family. The Valoniace® are divided into the two families, 
Valonie® and Anadyomene®, the former comprising the genera Apjohnia, 
Blastophysa, Valonia, Dictyosphseria, Siphonocladus, and Chamsedoris , the 
latter Struvea, Microdictyon, Cystodiclyon, Anadyomene, and Boodlea. 
The Dasycladace® are classified under Acetabularie® and Dasyclade®, 
the former comprising Polyphysa, Halicoryne, and Acetabularia, the 
latter Dasycladus, Chlorodadus, Botryophora, Neomeris, Bornetella, and 
Cymopolia, in addition to the fossil genera. 
In the classification of Charace® there is nothing fresh. A 
general classification of Ph®ophyce® is given, and Part 60 carries on 
the description of the separate families as far as the Ectocarpace®, 
Choristocarpace®, and the commencement of Sphacelariace®. 
Under each family a full account is given of the non-sexual and 
sexual organs and modes of multiplication, the geographical distribution, 
and the genetic relationships. Then follows the classification of the 
genera, and a diagnosis of each genus. The more important literature 
relating to each group is cited ; the illustrations are numerous and very 
well executed ; many of them quite new to English readers. 
Thorea.* — Prof. M. Moebius describes a new species of Thorea, 
T. andina from Ecuador, and gives his adhesion to the older view that 
* Ber. Deutseh. Bot. Gesell., ix. (1891) pp. 833-44 (1 pi.). 
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