Explanation of Plate 17 



I. Aleukia aorantia (Pers.) Fuekel. 



a. Group of plants natural size. 



b. Diagram section natural size. 



c. Ascus and paraphysis X 600. 



(1. One spore showing markings X 1800. 



II. Aleuria rutilaxs (Fries) Gill. 



a. Cups showing habitat X 2. 



b. Diagram section X 2. 



c. Ascus with paraphysis X 500. 



•I. One spore showing markings X 1500. 



164 



