46 Structure and Classification of Micro-organisms 



are included in the group ot fungi imperfecti, and are characterized by 

 a luxuriant tangled septate mycelium, with aerial fruit hyphs, 

 ending in conidiophores, each of which divides into two or three 

 sterigmata, the tip of which forms a chain of rounded spores. The 



Fig. 15. — Aspergillus glaucus: A, A portion of the mycelium m, with a con- 

 idiaphore c, and a young perithrecium F, magnified 190 diameters; B and B', 

 conidiaphore with conidia; B, individual sterigma greatly magnified; C, early 

 stage of the development of the fructifying organ; D, young perithrecium in 

 longitudinal section; w, the future wall of the contents; as, the screw, magnified 

 250 diameters; E, an aseus with spores from a perithrecium, magnified 600 

 diameters (duBary). 



whole germinal organ thus comes to resemble a whisk-broom or, as 

 Hiss describes it, a skeleton hand, in which the conidiaphore cor- 



Fig. 16. — Penicillium: a, Mycelium; b, conidiaphores; c, d, sterigmata; e, 



spores (Eyre). 



responds to the wrist; the sterigrhata, to the metacarpal bones; the 

 chains of spores, to the phalanges. 



None of the penicillia is know to be pathogenic either for man or 

 animals. 



