ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
89 
Algae, 
New Genera of Algae.* — Prof. J. G. Agardh publishes, as a supple- 
ment to his * Species, genera, et ordines Algarum,’ a detailed account 
of the genus Callithamnion, which he divides into sixteen genera or sub- 
genera, of which the following are new : — Microihamnion ( C . interruptum'), 
Platythamnion ((7. heteromorphum and orbignianum ), Acrothamnion (G. 
pulchellum ), Heierothamnion ((7. Mueller i), Gymnothamnion (6r. elegans ), 
Perithamnion (P. ceramioides ), Geratothamnion ((7. Pikeanum), Loplio- 
thamnion (L. comatum ), and Aristothamnion (G. purpuriferum). 
The following new genera are also described : — Blastopliye ( Crypto - 
nemia Wilsonis and Rally menia phyllophora), Meredithia (K. microphylla , 
&c.), Hormopliora ( H . australasica sp. n.), Ozophora (0. California sp. n.), 
Leptosomia (Chrysy menia Cliftoni and gelatinosa) J Leptocladia (L. Bing - 
hamise sp. n.), Erythronaema (E. ceramioides sp. n.), Amylophora (A. Coleae 
sp. n.), Peltasta (P. australis sp. n.), and Amphiplexia ( A . hymeno - 
cladioides sp. n.). 
The genera of Rhodomelaceas are then described in detail and 
classified into eleven suborders, and the following new genus estab- 
lished : — Cyclospora ( G . Curtissiae sp. n.). 
Descriptions are also given of a number of new species belonging to 
other families of seaweeds. 
Algae of the Black Forest and Rhine Country.f— Herr W. Schmidle 
states, in some preliminary remarks accompanying a classified list, that 
waters containing but little lime are especially rich in desmids, but 
contain few filiform algae, while these abound in calcareous waters. The 
latter are often entirely barren of desmids, but sometimes afford some 
rare and little-known forms. A new genus of Palmellaceae is described, 
Kirchneriella , separated from Baphidium ; and the following new 
species : — Kirchneriella lunata, Cladophora striata , Gcelastrum pulchrum, 
Cosmarium subcucumis , G. insigne , G. subpachydermum , (7. lobulatum f 
C. subbroomei, Staurastrum nigrse sylvae. 
Pellicle of Algse.J — Hr- S. Stockmayer describes a dense coat formed 
on overflow-water of the Danube, and composed of masses of Microcoleus 
chthonoplastes and Calothrix parietina , the latter a freshwater form found 
on rocks, walls, &c., the former properly a marine alga or halophyte. 
“ Meteoric Paper.” § — Herr J. Istvanffi has examined the object 
which goes by this name obtained from several localities in Germany 
and Hungary, and finds it to be composed, in the different cases, of the 
following Algm : — Microspora floccosa t with about thirty other species 
involved in its weft ; Lyngbya turfosa ; Cladophora fracta ; and Sphaero - 
plea annulina in a fructifying condition. 
Pleurostichidium, a New Genus of Floridese.H — Herr F. Heydrich 
describes, under the name Pleurostichidium Falkenbergii , the type of a 
new genus of seaweeds from New Zealand, epiphytic on Fucodium 
• Acta Univ. Lund., xxviii. (1892), 182 pp. and 3 pis. 
t Ber. Naturf. Gesell. Freiburg-i.-B., vii. (1893) pp. 68-112 (5 pis.). 
t SB. Zool.-Bot. Gesell. Wien, xliii. (1893) pp. 28-30. 
§ SB. Bot. Fachver. K. Ungar. Gesell. Naturwiss., March 8, 1893. See Bot. 
Centralbl., lv. (1893) pp. 395. Cf. this Journal, 1891, p. 777. 
U Ber. Deutsch. Bot. Gesell., vii. (1893) pp. 344-8 (1 pi.). 
