ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 403 



New Spirogyrg,.* — Y. Kasanowsky describes a new species of Spiro- 

 gijra which he found near Kiew. The peculiar features are : the variety 

 of form of the chlorophyll bands, irregularities in their course, bifur- 

 cation, unequal length of the chlorophyll bands, and their number. 

 The cell possesses mostly two distinct chlorophyll bands, symmetrically 

 arranged. Sometimes cells occur with only one chromatophore, the 

 number of windings in such cells being sometimes 14 to 16. In certain 

 respects this Spirogyra shows great resemblance to the Desmid Genicu- 

 laria spirotsenia de Bary. Copulation and the zygospores and their 

 germination are described. G. Nmcaschini, in the structure of the 

 mesophore, is allied to S. reticulata Xordstedt, and S. calospora Cleve, but 

 differs from them in many important details. 



Two New Algge.t — F. Brand describes two new species collected 

 by 0. Borge in Xorth Sweden, Cladophora humida and Rhizoclonium 

 lapfponicum. He discusses the bostrychoid branching which occurs in 

 both species and contrasts it with the mode of branching found in the 

 majority of Cladophora species. Such bostrychoid branching has been 

 figured in older literature for Rhizoclonium, but was not recorded in 

 Cladophora till 1877. 



Fossil Codium.J — H. Gliick has discovered in the marine Tertiary 

 strata of Southern Baden, a fossil which in habit and structure closely 

 resembles the genus Codium. He calls it Microcodium elegans. Since 

 it occurs in strata bearing a littoral character, it probably lived like 

 Codium in shallow water on the coast. Figures of the structure show 

 the remarkable similarity between the fossil and the modern alga. 



Fresh-water alg-ae of Samoa. §—N. Wille pubhshes diagnoses of 

 new fresh-water algae from the Samoa Islands — four species, nine 

 varieties, two forms — comprised in twelve genera. They were collected 

 in 1905 by K. Rechinger. 



Fung-i. 



(By A. LoRRAiN Smith, F.L.S.) 



Conjugation in the heterogamic genus Zygorhynchus.|| — A. F. 

 Blakeslee describes the process thus : — " A terminal portion of an erect 

 hypha is separated by a septum from the part below ; immediately 

 beneath the septum is produced a branch which growing upwards 

 recurves to approach the filament or zygophore above the septum. This 

 filament contains but a small amount of protoplasm that becomes 

 massed at the point of contact ; the second zygophore produced below 

 the septum is from the outset richly supplied with dense protoplasm. 

 Immediately after contact between the two, a progamete arises as a 

 perpendicular outgrowth from the slender erect zygophore, and a 



* Ber. Deutsch. Bot. Gesell., xxxi. (1913) pp. 55-9 (1 pL). 



t Hedwigia, liii. (1913) pp. 179-83. 



X Mitt. Grossh. Badisch. Geol. Landes., vii. (1912) Heft 1, 24 pp. (4 pis.). 



§ Hedwigia, liii. (1913) pp. 144-7. 



11 Mycol. Centralbl., ii. (1913) pp. 261-4 (1 pi.). 



