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RESEARCHES ON FUNGI 



Fig. 42. — Pilobolus Kleinii. The excretion and drying of drops. A, the upper 

 part of a young fruit-body : a, tlie sporangium ; 6, the subsporangial swelling 

 beginning to expand. Numerous small drops have been excreted by the 

 sporangium, and two very large drops have appeared at the junction of the 

 sporangium and the subsporangial swelling. B, another young fruit-body, 

 similar to A, but seen from above. The drops attached at the junction of the 

 sporangium and the young subsjjorangial swelling are of the maximum size. 

 C, amaturefruit-bodyshortly before the discharge of the sporangium. The drops 

 on the sporangium a and the upper part of the subsporangial swelling b are drying 

 up and in doing so are becoming irregular in form, thus revealing the fact that they 

 contain a gelatinous substance. The excretion of drops has been especially active 

 in the lower part of the subsporangial swelling, but the largest drops are on the 

 stipe, c. Drawings made with the help of a camera lucida. Magnification, 90. 



