350 Algae. — Eumycetes. 



Lagh.; Scenedesmus acmninatus (Lagh.) Chod.; Chlorella Beijer , 

 C. sp., C. vulgaris Beijer, C. luteoviridis Chodat, nov. sp. et var. 

 lutescens Chodat nov. var.; Raphidmin pyrenogerurn Chod., Rich- 

 teriella Lemm., R. botryoides {'^c\\K^\äü€)\^&TCixn.y R. botryoides, iox\x\?i 

 fenestrata Schroeter; Aphanochaele (Berth.) Hansg., A. repens A. 

 Br. ; Microcystis incerta Lemm., M. ichthyoblable Kütz.; Gloeothece 

 Näg., G. tepidarioruin (A. Br.) Lagerh.; Gloeocapsa Kütz., G. moii- 

 tana Kütz.; Synechococcus cedrorian Sauvag.; Aphatiothece saxicola 

 Näg.; Aphanocapsa Nägelii Richter; Oscillatoria liniosa var. laete- 

 aeriiginosa Kütz., O. limnetica Lemm., 0. angiiina Bory, O. brevis 

 Kütz., O. anioena (Kütz.) Com.; Spinilina sub sola Oerstedit; Anabaena 

 catenula (Kütz.) Bornet et Flahault, A. flos-aquae (Ljmgb.) Br6b., 

 A. angstumalis Schmidle; Scytonenia crisptan Bornet et Flahault. 

 Ce catalogue comprend 371 especes, dont 99 Diatomees. 



Henri Micheels. 



Dastur, J. F., On Phytophtlwra parasitica s p. nov. A new 

 Disease of the Castor Oil Plant. (Mem. Dept. Agric. India. 

 Bot. Series. V. 4. p. 177—231. 10 pl. May 1913.) 



The new disease of Ricivuis communis was detected at Pusa 

 in 1909, and the present paper, based on observations extending 

 over 3 — 4 years, forms a very detailed account of the disease and 

 the life history of the fungus. 



After the general account and record of infection experiments, 

 the author passes on to the growth of the fungus in pure-culture. 

 Sporangia were produced freely, and germination may take place 

 in three waj's, namely by means of zoospores, secondary sporangia 

 or a germ tube. Chlamydospores, hitherto only known in P. Faberi, 

 were also obtained. The question of the oogonium and fertilization 

 is next considered. In the living plant no oospores were found, but 

 in artificial culture both antheridia and oogonia were produced. The 

 development of the sexual organs follows the remarkable course 

 recently described by Peth^'^bridge. The oogonium origin enters the 

 antheridium, grows through it and out at the further side, swelling 

 up there to form the oogonium proper. The oosphere is then diffe- 

 rentiated, which is followed by the thickening and colouring of the 

 oogonium wall. No process which could be interpreted as an act of 

 fertilization could be seen, The similarity to Clinton's observations 

 on P. infestans is dwelt upon. The structure of the membranes is 

 described in detail. 



The paper closes with notes on the media employed, an account 

 of inoculation experiments on other hosts, and with a discussion of 

 the relationship between P. parisitica and allied species. 



A. D. Cotton. 



Butler, E. J. and G. S. Kulkarni. Studies in the Peronospo- 

 raceae. (Mem. Dept. Agric. India. Bot. Series. V. 5. p. 233—280. 

 pl. 1—9. May 1913.) 



The present memoir contains 4 papers as under: 



\. Butler and Kulkarni. Colocasiae Blight caused by Phytoph- 

 thora Colocasiae, Rac. (1. c. p. 233 — 259.) 



The general features of the disease are descrided, and also the 

 microscopic structure of the organism. A section dealing with the 

 growth of the fungus in pure culture follows, in which the forma- 



