Botany and Zoology. 163 



the proposed publication of which has already been announced in 

 this Journal (vol. xii, p. 152). The Zeitschrift will fill a place 

 hitherto unoccupied by any scientific publication being especially 

 devoted to the science of Crystallography in its relation particu- 

 larly to Mineralogy, and also to the departments of Chemical and 

 Physical Mineralogy. It will thus cover the whole field of miner- 

 alogy. Moreover, 'in addition to original articles, it will contain 

 abstracts of all mineraiogieal papers wherever they may appear, 

 and in whatever language, and thus become a complete repertorium 

 for the science. To carry out this part of the work, certainly not 

 the least important, the editor has secured the cooperation of lead- 

 ing active mineralogists in England, America, Italy, Denmark, 

 Norway. Russia, Hungary, Bohemia, etc. It is hence evident 

 thai i \u- Zeitschrift will be a most invaluable help to all workers 

 in this Held of science; and it is much to be hoped that the dis- 

 tinguished and energetic editor will find the hearty support which 

 he deserves, not onlv in Uennanv. but in all countries where the 

 science is cultivated'. It will be published in octavo numbers of 

 6 to 7 signatures, commencing with January, 1877. Each volume 

 will include six numbers, and, with the accompanying plates, u ill 

 cost not more than .30 marks. Authors of 

 receive free twenty-five extra copies. The publisher is W. 



III. Botany and Zoology. 



und umjesi 



> paper, whi 

 ,th volume 



cj; rills 



of Prii 



the 



,Sc 1, -p 



i elaborated 

 iionally by 



he of 



with s 



the 

 Uch 

 hat 



of sexuality in plants in its si- 

 methodical arrangement of the article, it is 



: ; : . . . ■ . - • •- ■ - • ■ ' ' / ; 



This is ,. mv of the tacts brought forward 



are quite , „, ,7 ii _ ^Tlothrix belongs to the order 

 ZoSsporece in which - place by means ol 



spores and microzoospores, the former I _' . u 



and one germinative spot (the name given to the reddtsh-colored 

 dot found on one side), the latter having only two. The former 

 bodies have for some tune been ,-, 

 latter have been .upp.^l to represent s 



their union; d from the 



macrozoospores by having two g< ' r ' a ' ot °" e - 



: 



■' and t ^y^te proper Dodel 

 confirms the views of Areschoug, Cramer and others, that the 



