THE PERITHECIUM OF MELIOLA. 19 



view entertained or rejected. I am strongly impressed with the neces- 

 sity for further and closer investigation of the very remarkable group 

 of fungi centering around or near the Meliolce, since they will probably 

 fill up yet more completely the gap — partially bridged over, it is 

 true — between the lower and higher Ascomycetes. 



DESCRIPTION OF PLATES I & II. 



Fig. 1. Meliola sp. with portion of epidermis of Memecylon. On the 

 mycelium are setce, branchlets, and fruit-bodies in various 

 stages of development. — Zeiss L\ 



Fig. 2. Mycelium of another species of the same, found on the leaves 

 of Schutereia (Conv.), with portion more highly magnified. 

 — Gundl. J and Zeiss L\ 



Fig. 3. Portion of mycelium of a species of Meliola on Triumfetta 

 (Tiliacece). — Zeiss D. 



Fig. 4. Portions of more advanced mycelium of fig. 2 more highly 

 magnified, and showing various forms of lateral branch- 

 lets. — Zeiss J. 



Fig. 5. Portions of mycelium on Memecylon showing mode of 

 branching and young fruit-bodies. — Gundl. I and Zeiss D. 



Fig. 6. Vertical section through portion of mycelium where fruit- 

 body is being formed. The section is not median. — 

 Zeiss J. 



Fig. 7. End of hypha with three cap-like thickenings and pore-like 

 spot (haustorium ?) seen from below. — Zeiss J. 



Fig. 8. Various forms of setce in plan and elevation. — Zeiss D. and J. 



Fig. 9. End of hypha (with one cap-like thickening) bearing lateral 

 pyriform branchlet which is to become a Perithecium. 

 The first oblique septum has already appeared, the 

 smaller cell (A) represents the ascogonium, &c, and is 

 shaded darker ; the larger one (B) will divide up more 

 rapidly, and enclose the cell A and its progeny. 



Figs. 10 and 11. Further stages in the development of the young 

 Perithecium. The cell B is becoming divided. — Zeiss J. 



