140 
William J. Hodgetts, 
Figs. 1-9. Leptosphceria acuta. 
Fig. 1. Group of perithecia in profile on dead nettle stem. Fig. 2. 
Mature ascus, with paraphysis on the right. Fig. 3. An ascus, the inner 
coat of which has just ruptured the outer at the apex. Fig.4. The same 
a few seconds later showing the elongated inner coat. Fig. 5. An ascus 
that has dehisced irregularly owing to artificial pressure ; the swollen inner 
coat is emerging through two annular splitsin the outer coat. Figs. 6 to 9. 
Successive stages in the ejection of the first spore through ostiole of a 
perithecium, observed in profile, in moist air. 
Fig. 1, x 15 ; Figs. 2 to 4, x 300; Figs. 5 to 9, x 400. 
