296 



MANUAL OF POISONOUS PLANTS 



crust; the odor is very disagreeable, being compared to the odor of mice or 

 the urine of cats. 



Mice are most susceptible to the disease, cats coming next since they 

 come in contact with mice which have favus, then dogs by means of the cats 

 and finally guinea pigs. 



According to the recent investigations of Frank (1891) three different types 

 of fungi were isolated from mice, and Unna and Neebe in 1893, concluded that 

 no fewer than nine species existed, three aerophilous and six aerophobic, as 

 follows: Achorion etitythrix, A. didikroon, A. atkaton, A. radians, A. akro- 

 megalicum, A. demergens, A. cysticum, A. momUforme, and A. tarsiferon, but 

 •these may probably be regarded as one widely-polymorphic species. 



Fig. 109. Epidermis invaded by Sporotrichum. 

 a — inferior portion of the stratum corneum; b — superior 

 portion of the rete. Both exhibit lotiR mycelial threads, 

 with a few ramifications and a small number of spores. 

 After Kaposi. 



