Palaeontologie. — Algae. — Eumycetes. 97 



The latter represents a type recently recognized from the Upper 

 Cretaceous, the occurrence of which in the late Triassic is a matter 

 of considerable interest. Berry. 



Lindsay, J., A Rare British Freshwater Alga. (Trans. Edinb. 

 Field Nat. and iMicr. Sog. VI. pp. 310—316. 1911.) 



In this paper is an account of Oscillatoria proUfica (Grev.) Gom. 

 from its original locality, The Haining Loch, Selkirk, Scotland, 

 from which place it was first described by Greville (1823—1828). 



G. S. West, 



West, G. S., Some New African Species of Volvox. (Journ. 

 Quekett Micr. Club, ser. 2. XL p. 99—104. pl. 3. Nov. 1910.) 



A report upon specimens of the genus Volvox supplied to the 

 author by Mr. C. F. Rousselet. The first part of the paper contrasts 

 the characters of the two common European species, V. globator 

 Ehrenb, and V. aureus Ehrenb. 



A new species, coUected by Mr. Rousselet near Gwaai in 

 Rhodesia, is described under the name of V. Rousseleti. It is one 

 of the largest known species of Volvox, attaining a diameter of 

 1.123 -1.24 mm. One of its chief features is the dense crowding of 

 its cells, which vary from 25,000 to 50,000 in number. The colonies 

 have a stronger and more robust appearence than those of any 

 other species of Volvox. 



Another new species is V. afncamts from the plankton of the 

 Albert Nyanza. This is characterised by its egg shaped colonies 

 and nature of the daughter-colonies. From one to four of the latter 

 arise in each colony, attaining such a large size that they become 

 flattened by compression before they escape from the mother- 

 colony. Both the new species are illustrated b}"^ photographs. 



G. S. West. 



Havelik, K., Ueber den Fruchtkörper des Hausschwam- 



mes. (Ziva. p. 13 sq. 1912. böhmisch.) 



Verf. beschäftigt sich mit der x\usbi]dung des Fruchtkörpers 

 von Merulius lacyymnns, und kommt nach seinen Beobachtungen 

 zum Schlüsse, dass die Ausbildung und morphologische Beschaffen- 

 heit des Hymeniums nur von der Lage des Fruchtkörpers und von 

 dem Grade der Feuchtigkeit abhängig ist. Die verschiedensten For- 

 men des Hymeniums sind nur biologische Erscheinungen, denen 

 man keinen S5'stematischen Wert zuschreiben kann. 



Jar. Stuchlfk (München). 



Hood, O. E., Rhisophidiiirn Eudorinae, a new Ch vtridiaceous 

 Fungus. (Proc. Birm. Nat. Hist and Phil. Soc. XII. 1910. 8 pp. 

 and 5 text-figs.) 



This fungus was attacking colonies of Eiidorina elegans in the 

 plankton of Bracebridgc Pool in Sutton Park, Warwickshire, during 

 the years 1908—9. The Risophidiiim is at first entirely peripheral 

 and becomes attached to the algal cells by a delicate protoplasmic 

 thread, but as it becomes nourished at the expense of the green 

 cells, it becomes sunk below the peripheral mucus, assuming the 



Botan. nuntiaiblatt. B.and 122. 1913 7 



