ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 225 



Mycetozoa. 

 (By A. LoEBAiN Smith.) 



Myiomycetes of North G-ermany.* — H. Ronn publishes an account 

 of the development of these organisms and of the influence exercised on 

 them by various factors, and proceeds to give a list of the species found 

 in that country. Some of those listed are very rare ; two of them are new 

 to Europe, and a considerable number new to Germany. 



Schizophyta. 

 Schizomycetes. 



Classification of Streptococci.f — E. le Blanc has investigated the 

 cultural characters of various strains of streptococci, and has differenti- 

 ated three types according to the nature of their growth upon blood- 

 plates. These types are named Streptococci longus patliogenes sea erysipe- 

 latos, S. mitior sen viridans, and ^S'. saprophyticus. It was not found 

 possible, by cultivation upon various media, to cause any transformation 

 from one type to another. The author, further, has investigated the 

 bactericidal action of milk and of horse-serum, and has found that 

 different samples of horse-serum vary in their degree of bactericidal 

 power. The addition of sterile alkaline broth diminishes, that of sodium 

 citrate exalts, the bactericidal property of horse-serum. 



Relationship of Acid-fast Bacilli. | — F. F.Wills describes a research 

 into the relationship of various organisms of this type, as demonstrated 

 by the reactions of specific tuberculous and leprous sera in the presence 

 of emulsions and of other derivatives of these bacilli. In addition to the 

 tubercle and the leprosy bacillus, such organisms as the Timothy-Uram 

 bacillus, the urine bacillus, and the slow-worm bacillus were investigated. 

 Stress is laid upon the presence of similar fatty bodies in aU these types, 

 and upon the fact that specific anti-bodies to these fatty bodies can be 

 produced. In consequence of this fact, and upon the observation that 

 cross-deviation between various sera and antigens derived from the dif- 

 ferent bacilli may occur to a considerable extent, the opinion is formed 

 that these bacilli have a close mutual relationship and not merely an 

 artificial association founded upon a like staining reaction. In his obser- 

 vations upon opsonic indices, the author points out that there exists a 

 remarkable reciprocity in the behaviour of leprous and tuberculous sera 

 against the respective bacilli. 



Intestinal Flora of Healthy Cattle.§ — From the intestines of healthy, 

 full-grown cattle, A. Horn and E. Huber have isolated a number of 

 different bacteria, whicli resemble to some extent certain organisms, 

 possessed of pathogenic properties, belonging to the coli-typhoid group. 

 In the first place are described a number of organisms whose cultural 



* Schrift. Nat. Ver. SchleBwig-Holstein, xv. (1911) pp. 20-76. See also Ann. 

 Mycol., ix. (1911) p. 632. 



t Centralbl. Bakt., Ite Abt. Orig., Ixi. (1911) pp. 68-86. 

 1 Centralbl. Bakt., I'e Abt. Orig., Ixi. (1911j pp. 37-58. 

 § Centralbl. Bakt., Ite Abt. Orig., Ixi. (1911) pp. 452-81. 



