Algae. — f'ungi, Bacteria und Pathologie. 151 



This paper is a continuation oi a previous one on the subject and 

 it treats of Desmidiaceae. Alter a short resume of the work of previous 

 authors on Victorian Desmids, a list of 49 species and some varieties 

 is given^ with the localities where each occurs in the colony. Three new 

 species and eight new varieties are described by G. S. W e s t and a plate 

 shews the new Victorian iorms of Micrasterias. The diagnoses oi novel- 

 ties are in english and describe the same species and varieties as 

 those published by G. S. West in the Journal of Botany for September 

 1905, p. 252—254. E. S. Gepp-Barton. 



Jackson, Daniel D., TheMovementsof Diatoms and other 

 microscopic Plant s. (Journal of the Royal Microscopical 

 Society. Part 5. October 1905. p. 554—557.) 



After a short discussion of the theories of previous vvriters, 

 the author gives his reasons for stating that the motion of dia- 

 toms is caused by the impelling force of the bubbles of oxygen 

 evolved from the Chlorophyll bands of diatoms, and that the 

 direction of the movement is due to the reiatively larger amount 

 of oxygen set free, first from the forward and then from the 

 rear half of the organism. The movem.ents of other micro- 

 scopic plants are compared with the movements of diatoms. 

 The author considers that the sam.e explanation holds good for 

 Osclllarla, Nostoc and Desmids. E. S. Gepp-Barton. 



Laing, R. M., Revised List of New Zealand Seaweeds. 



Appendix !. (Transactions and Proceedings of the New 



Zealand Institute. Vol. XXXVII. 1904. Issued June 1905. 



p. 380—384.) 



The author intends to add to his list of New Zealand seaweeds, 

 as opportuni y offers, and the additions will appear in the form of appen- 

 dices, of which this paper is the first, only such species will be included 

 which have been found since the original list was published, or such old 

 species as have been found by the early voyagers and rejected by 

 Agardh, but rediscovered and identifled by later investigators. The 

 present paper includes records of 30 speeies of which Ceramiiim Laingü 

 and Bostrychia similis are new. The former grows on Codium mucrona- 

 tum, and in habit resembles Ceramiiim pusilliim, from which it differs 

 in the position of the tetraspores. E. S. Gepp-Barton. 



Murray, George, On a new Rhabdosphere. (Proc. Royal 



Society. Vol. LXXVI. Series B. 1905. p. 243, 244. Fig.) 



The author describes a new species, R. Blackmaniana which is very 

 minute, 10 ,«, about one quarter the size of R. claviger, with tapering 

 acute, Short, spinous processes. It was collected during the outward 

 voyage of the Discovery, in the South Atlantic, Lat. 28" 25' S., 

 Long. 23' 56' W. The figure is diagramatic. E. S. Gepp-Barton. 



BUCHOLTZ, Fedor, D i e Pnccinia -Arten der Ostseeprovinzen 

 Russlands. Vorstudie zu einer baltischen Pilz- 

 flora. (S.-A. aus „Archiv für die Naturkunde Liv-, Esth- 

 und Kurlands". Bd. XIII. Lief. I. Jurjev [Dorpat] 1905. 

 p. 1—60.) 



Es werden für das Gebiet 102 Arten aufgezählt. Die von 

 A. H. Dietrich in den Cryptogamen-Centurien (1852-1857) heraus- 



