296 Physiologie. — Palaeontologie. — Microscopie. 



gestorben ist, und demzufolge auch die Mistel, schreibt Verf. der 

 geringen Verwandtschaft zwischen Sorbus und Viscuin zu, sodass 

 eine dauerhafte Verbindung dieser disharmonischen Pflanzen durch 

 die einseitige Ernährung (seitens der Mistel) unmöglich war. 



M. J. Sirks (Haarlem). 



Arbep, E. A. N., A Preliminary Note on the Fossil Plants 

 of the Mount Potts Beds, NewZealand,Collectedby 

 Mr. D. G. Lillie, Bio logist to Captain Sc Ott 's Antarctic 

 Expedition in the "Terra Nova." (Proc. Roy. Soc. B. 

 LXXXVI. p. 344—347. pl. 7—8. 1913.) 



From the beds in which Hector identified the genus Glossopte- 

 yis, and about which there has been much discussion, the present 

 author describes the plants collected by the biologist to the Scott 

 expedition. He denies that the supposed Glossopteris belongs to that 

 genus, and creates a new genus for it, viz. Lmguifolium and calls 

 the species Lülieaniun after Mr. Lillie. The names of other plants 

 are mentioned, e. g. Chiropteris, lacerata sp. nv. Baiera cf. paiicipar- 

 tita Nath., Dictyophylluin acutüohitm (Braun) Cladophlebis aiistralis 

 Morris and other fragments. Only two are described as exclusively 

 Jurassic, viz. Palissya conferta (Old.) and Taeniopteris Daintreei 

 Mc. Co5^ The conclusion being that the flora is essentially Rhaetic 

 or Lower Jurassic. The existence of Glossopteris in the islands of 

 New Zealand is denied, and it is stated that there is no evidence 

 that the countr\r ever formed part of Gonduanaland.» 



M. C. Stopes. 



Holden, R., Some Fossil Plants from Eastern Canada. 

 (Annais Botany. XXVII. p. 245—255. pl. 22—23. 1913.) 



The paper describes pith casts of Tylodendron from Prince 

 Eduard Island, which are taken as indicative of Permian age 

 for the leeds. After discussing the structure and afifinities of the 

 'genus' the author concludes that there "appear no sufficient grounds 

 for relating it to an}^ one living group rather than to another." 



The second section of the paper deals with Voltsia, which the 

 author concludes, is another transitional form and presents additional 

 evidence for the derivation of the Arancarineae from the Ahietineae. 



The author states that the foliage of Voltsia coburgensis is 

 Araucarian, the Organization of the cone Abietineous and the ana- 

 tomical structure intermediate between the two groupes. 



M. C. Stopes. 



Joly, J., A method of Microscopie Measurement. (Sei. Proc. 

 Roy. Dublin Soc. XIII. (N. S.) 30. p. 441-442. 1 textfig. 1913.) 



The method of microscopie measurement described is said to 

 give more accurate results than the usual methods. 



Two fine lines meeting at a point and graduallj^ diverging are 

 drawn with indian ink on white paper. Using the camera lucida. 

 the paper is shifted until the object to be measured appears to fit 

 exactly between the lines, at a distance, d^^, from the point where 

 the lines meet. An engraved scale divided to O.Ol mm, is now sub- 

 stituted for the object, and the paper is shifted until a few, — say 

 n — divisions fit exactly between the lines at a distance d^ from 

 the point where the lines meet. The diameter, x, of the object is 

 round from the proportion: 



X : n : : dl : do. Agnes Arber (Cambridge). . 



