508 
MR. H. M. WARD ON THE MORPHOLOGY AND THE 
Fig. 9. End of hypha (with one cap-like thickening) bearing lateral pyriform 
bran chief which is to become a Perithecium. The first oblique septum has 
already appeared, the smaller cell (A) represents the ascogonium, &c., aud 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. 
Fig. 12. Young Perithecium seen from below (a.), from the side (6.), and from one end 
(c). In all, the dark cell is the one marked (A) in fig. 9 ; the remainder 
have resulted from the growth and division of the cell (B.)— Zeiss J. 
Figs. 13 and 14. Slightly later stages seen from below. The cell (A) has become 
divided by a cross septum.— Zeiss J. 
Figs. 15 and 16. Similar preparations seen from above aud below.— Zeiss J. 
Fig. 17. Somewhat more advanced Perithecium seen from the side. The cells 
resulting from the division of A (“ ascogenous core”) are seen through those 
formed by B, which are growing over them.— Zeiss J. 
Fig\ 18. Somewhat more advanced stage.— Zeiss J. 
Fig. 19. Slightly later stage. The upper figure is seen from above, the lower from 
below : the latter shows the “ ascogenous core.”— Zeiss J. 
Fig. 20. Similar preparations seen from above (lower figure) and below (upper figure.) 
—Zeiss J. 
Figs. 21 and 22. Slightly advanced Perithecia cut by the razor. The “ ascogenousc ore” 
is exposed at the cut parts.— Zeiss E. 
Figs. 23 and 24. Similar preparations treated with chromic acid. The “ ascogenous 
core” is seen enveloped by the cells forming the Perithecium-wall : all much 
swollen, and fig. 23 slightly crushed.— Zeiss J. 
Fig. 25.—More advanced Perithecium seen from outside and above (x.), below (y.), and 
from the side (z.). The radiating liyplue (receptacle) spring from the 
external walls below.— Zeiss E. 
Fig. 26. Portion of mycelium with young Perithecium seen from above and below.— 
Zeiss E. 
Fig. 27. Somewhat older Perithecium. The razor has cut off one side obliquely. 
— Zeiss J. (camera). 
Fig. 28. Vertical section through young Perithecium about this stage. The ascogenous 
cells in the middle are distinguished by their larger size and arrangement. 
— Zeiss J. 
Fig. 29. Oblique (nearly horizontal and median) section through the same. — Zeiss J. 
Fig. 30. Horizontal section above the base of same.— Zeiss J. 
Fig. 31. Somewhat older stage in vertical section. The ascogenous cells in the centre 
are enlarging at the expense of those around.— Zeiss J. 
Fig. 32. Portion of outer wall with disorganised cells lining it.— Zeiss J. 
