174 



Mycologia 



sporis 5-10 X 10-15 fx conidiophoris e mycelio lateraliter nascenti- 

 bus, erectis vel decumbentibus, simplicibus vel raris ramosis, non 

 vel raris septatis, 2-20 X 3-5 ^ in aere sicco, 5-50 X 3-8/* in aere 

 humido, non hydrotropismis, summo capitulo globoso 10—35 f 1 

 diam. ; conidiis in aere humido muco-glomeratis, in aere sicco 

 separatis vel laxe cohaerentibus, ellipsoideis vel ovoideis et con- 

 tinuiSj vel in aqua falcatis, allantoideis et 1-8 septatis, hyalinis, 

 granulosis. 



Hab. in dextrose agar pulvene terrae humosae infecta. 



Var. purpurascens. Hyphis sterilibus primo hyalinis, albis, 

 denique roseis vel purpureis ; conidiis hyalini vel purpurascen- 

 tibus, pigmento purpureo in alcohol et aqua soluto, in dextrose- 

 agar et alteris mediis saccharis diffuso. 



Hab. in dextrose agar pulvere terrae humosae infecta. 



Bacteriological Laboratories, 

 Iowa State College, 

 Ames, Iowa. 



Explanation of Plate 50 

 Cephalosporin Pammelii Buchanan 



1. Microphotograph of type. Mycelium, sporophores and spores on the 

 surface of dextrose agar plate. Courtesy of Iowa Agricultural Experiment 

 Station. 



2. Microphotograph of type. Masses of falcate and allantoid, septate 

 spores. Surface of dextrose agar plate. Courtesy of Iowa Agricultural 

 Experiment Station. 



Explanation of Plate 51 

 Cephalosporin Pammelii and var. purpurascens 



1. Aerial conidiophores developing in relatively dry air. za. Medium moist 

 air, therefore somewhat moist, mucus globule not evident, ib. var. purpuras- 

 cens. Conidiophores in dry air after medium has dried, ic. var. purpurascens. 



2. Conidiophores which have grown in length intermittently, with clusters 

 of spores, za. var. purpurascens developed in relatively dry air. 2b. Type 

 developed in moist air with mucus globules. 



3. Aerial conidiophores of type, developed in moist air, showing the Hya- 

 lopus type of head. 



4. Conidiophores of type produced in contact with the surface of moist 

 agar. 4a, b, c, d. Illustrating the variety of spore shapes and sizes, and the 

 evident continued growth of the spore after abstraction. 



5. Falcate spores from a large spore mass, illustrating the method of bud- 

 ding and continued growth. 



6. Spores from the surface of agar, showing the unicellular and multisep- 

 tate forms. 6a. Septate spore from preparation stained with fuchsin to show 

 the nuclei. 6b. Septate spores of var. purpurascens with purple pigment. 



7. Chlamydospores of the type, from dextrose N free agar, ya, b, c, d, e, 

 showing development of spores, intercalary or terminal. 



