684 SUMMARY OF CURRENT RESEARCHES RELATING TO 



Agglutination of Yeast.* — Dr. A. Macfadyen has found that yeast- 

 juice (zymase) has the property of agglutinating yeast-cells when in- 

 jected into animals. The blood-serum of rabbits gave the best results. 

 Zymase thus appears to possess the power of producing agglutinins 

 in the animal body which have a specific reaction on the yeasts in 

 question. 



Place of the Parasite of Tuberculosis among Fungi.f — St. Droba 

 states that the exciting cause of tuberculosis grows on artificial media 

 as a mycele with long thick stolons and short thin rhizoids. In the 

 filaments there are no septa, but strongly refracting granules of a fatty 

 nature. In some phases conids or sporophores were present. Zygo- 

 spores, which exhibited all the stages of development from junction of 

 the sexual cells to their complete formation, were observed. The stylo- 

 spores, which were of frequent occurrence, presented themselves as 

 spherical bodies on short filaments. The parasite of tuberculosis there- 

 fore belongs to the Zygomycetes, and forms a new genus of the Chfeto- 

 cladiacea3. 



Sterigmatocystis Candida Saccardo. X — E- Pound found Sterig- 

 matocystis Candida Sacc. in the human ear, and gives the following de- 

 scription of this new human parasite. Fertile hypbje hyaline or 

 whitish, rather narrow, 150-200 by 10 jx ; vesicle globose, 30-35 li ; 

 basids clavate, 30 by 7^ /x, noticeably nbtuse and flattened at the top, 

 bearing three filiform sterigmata 10-15 ll long ; conids globose, not 

 exceeding 2 /x. 



Microsporium Audouini.§ — P. Vuillemin has cultivated this parasitic 

 fungus on human hair, and has determined that the Microsporium Audouini 

 Mai. is not identical with the original M. Audouini Gruby, but belongs 

 even to a different genus, Cercosphsera. On the other hand, the species 

 first described by Sabouraud as M. Audouini, but subsequently referred 

 to a different genus, Marteniella, is identical with Gruby's Microsporium 

 Audouini, or is at least closely related to it. 



Protophyta. 

 a. Scbizophycese. 



Eremosphaera viridis.j] — G. T. Moore disputes the statements of 

 previous observers with regard to the alleged polymorphism of this 

 alga. After cultivation for over two years in nutrient solutions and 

 on agar-agar, it showed no disposition to pass into any other form, 

 maintaining its characters as an independent genus. The only mode of 

 multiplication is by simple fission into two or four daughter-cells. 



Cell-structure of Phycochromacese (CyanophyceaeXlf — An exhaustive 

 study of several types of the blue-green algas has led R. Hegler to the 

 following general conclusions. 



* Centralbl. Bakt., l t0 Abt., xxx. (1901) )>. .".68. 

 t Bull. Internat. Acad. Sci. Craeovie, 1901, pp. 309-11. 

 j Trans. Amer. Micr. Soc, xxii. (1901) pp. 81-8 (1 pi.). 



§ Bull. Soc. Mycol. France, xvii. (190, i) p. 96. See Bot. Centralbl., lxxxvii. 

 L901)p. 3. 



II l'roc. Amer. Asa. Adv. Sci., 49th Meeting, New York, 1900, pp. 278-9. 



If Triiigsheim's Juhrb. f. wiss. Bot., xxxvi. (1901) pp. 229-354 (2 pis. and 5 figs.). 



