258 CYTOLOGY [BoT. Absts., Vol. VIII, 



logical problems, particularly of those relating to the cell plate and the dynamics of cyto- 

 kinesis, is briefly discussed. — E. W. Sinnoit. 



1827. Bezssonof, N. Erscheinungen beim Wachstum von Mikroorganism auf stark 

 rohrzuckerhaltigen Nahrboden und die Chondriomfrage. [Phenomena occurring in the growth 

 of microorganisms on media of high cane-sugar content and the chondriosome question.] Cen- 

 tralbl. Bakt. II Abt. 50: 444-464. PI. 1. 1920.— Molds cultivated on media with high cane- 

 sugar content reacted, from a morphological point of view, as follows: The Aspergillus 

 forms, Penicillium glaucum Bref. (Link), Aspergillus Oryzae, A. candidus, and A. Wentii 

 produce fruiting bodies in the form of incipient perithecia. A. Wentii differs from the others 

 in the shape of its ascogone and in this respect approaches the characteristic type of the 

 Erysiphaceae. Penicillium glaucum produces giant conidia. P. brevicaule, with its char- 

 acteristic mycelium, deviates further from the others in its poor growth on cane-sugar media. 

 Rhizopus nigricans produces zygospores, azygospores, and chlamydospores in cane-sugar 

 solutions; sporangia were observed only on solid media. — The following physiological and 

 cytological observations were made: Aspergillus Oryzae produces true alcoholic fermenta- 

 tion. The formation of ethyl alcohol was demonstrated both quantitatively and qualita- 

 tively. The fungi show fine granulation of the cytoplasm even in unstained material. Bac- 

 teria and fungi stain more intensely with nuclear stains because of the dispersion of the chro- 

 matin material. The accentuated development of generative cells, on media with high sugar 

 concentration, the dispersed condition of the cytoplasmic units as well as the state of dis- 

 persion of the chondriosomes points to an intimate relation between these phenomena. — 

 Anthony Berg. 



1828. CowDRY, N. H. Experimental studies on mitochondria in plant cells. Biol. Bull. 

 [Woods Hole] 39 : 188-200. 3 pi. 1920. — The author has conducted experiments on the radicles 

 of seedling peas to determine whether mitochondria might be utilized as cytological indicators 

 of cell activity. The conclusion is that "mitochondria are changed to an abnormal degree 

 only under severe conditions which either kill the cell or render its recovery very improb- 

 able."— iJZda R. Walker. 



1829. Dangeard, P. A. Observations relatives a la note precedente. [Observations 

 regarding an earlier communication.] Compt. Rend. Acad. Sci. Paris 170: 1518. 1920. — 

 Reference is made to the controversy between Guilliermond and the author. The latter 

 states that he still maintains his former contentions, but has nothing further to add at this 

 time. — C, H. Farr. 



1830. Dangeard, P. A. Sur la metachromatine et les composes tanniques des vacuoles. 

 [On the metachromatin and the tannin content of the vacuoles.] Compt. Rend. Acad. Sci. 

 Paris 171: 1016-1019. 9 fig. 1920.— A study of the vacuoles of Taxus baccata and the effects 

 of intravital stains indicate that the vacuoles are formed in association with metachromatin 

 and that this material is distinct from the tannin bodies which are formed later. — C. H. Farr. 



1831. Emberger, L. Etude cytologique de la Selaginelle. [A cytological study of Sela- 

 ginella.] Compt. Rend. Acad. Sci. Paris 171: 263-266. Fig. 1-6. 1920.— In the meristem 

 and sporogenous tissues of Selaginella there are mitochondria of all types; plastes (one in 

 each spore), microsomes of a lipoid nature, and a vacuolar system of unknown constitution 

 but similar to the metachromatin of fungi. The author differs with Dangeard on his inter- 

 pretation of these bodies. — C. H. Farr. 



1832. Guilliermond, A. Nouvelles observations cytologiques sur Saprolegnia. [New 

 observations on the cytology of Saprolegnia.] Compt. Rend. Acad. Sci. Paris 171: 266-268. 

 Fig. 1-6. 1920. — Vacuoles are found to be formed by the fusion of anastomosing canals. 

 The fungus contains chondriosomes, fatty globules, and a vacuolar system which is not 

 metachromatic in nature. Author finds that it is very difficult to distinguish the chondrio- 

 contes from the bacteria which are associated with the fungus.- — C. H. Farr. 



