Dale . — Observations on Gymnoascaceae . 595 
Fig. 28. Conjugating cells, showing the passage of nuclei from the ‘sterile cell ’ 
into the * ascogone.’ 
Fig. 29 a, b, c. ‘Sections of the old sexual cells as they occur in the centre of 
the ascocarps after their contents have passed into the ascogenous hyphae. 29 a 
shows ascogenous hyphae, vegetative hyphae, and developing asci. 29 c shows 
the segmented outgrowth of the ascogone with some of its branches. 
Fig. 30 a-d. Development of asci. a. Young ascus with a single large nucleus. 
b. Older ascus with the nucleus divided into two. The nuclei sometimes lie in one 
plane, b ', sometimes in another, b". c . Stage with four nuclei, d. Stage with 
eight or more nuclei. 
Fig. 31 a-d. Development of ascospores. a. Stage with four nuclei and a large 
vacuole, b. Stage with eight nuclei and a large vacuole, c. The eight nuclei 
enlarged in size, and surrounded by so much protoplasm that the vacuole has 
almost disappeared, d. The young spores surrounded by their walls. 
Fig. 32 a-f. Ascospores. a. Ascospore with two deeply staining bodies, b , the 
two bodies united by a stained protoplasmic strand, c. Spore with a densely 
stained central body with stained protoplasmic strands at each end of it. d. Spore 
with deeply stained central body. e. Larger spores diffusely stained, f Mature 
spores. 
Figs. 33-39. Gymnoascus setosus. 
Fig* 33 a. Part of the original material showing thickened spiny hyphae and 
loose ascospores (2.D). 33 b. Part of the same more highly magnified. (4.F.) 
Fig. 34. Formation of conidia. (4.F.) 
Fig- 35 - Conidial branches. (4-F.) 
Fig. 36. Conidium producing a small mycelium bearing other conidia. 
Fig- 37 - Conidia budding. (4-F.) 
Fig- 38. Streak culture consisting almost exclusively of masses of conidia. 
Fig- 39. Streak culture consisting of a mycelium bearing conidia. 
Figs. 40-60. Gymnoascus candidus. 
Fig. 40. Part of the original material showing conidia and vegetative hyphae. 
Fig. 41 a-c. Young stages of the young coil, consisting of a thick straight cell 
surrounded by a thin coiled hypha. Longitudinal sections or surface view. 
Fig. 42. The same in transverse section. 
Fig. 43 a and b. Longitudinal section of an older stage showing the central cell 
cut off by a transverse wall. 
Fig. 44. Conjugating cells in longitudinal section, a. Vegetative hyphae. 
Fig. 45. Conjugating cells in transverse section. 
Fig. 46 a. Central cell surrounded by the ascogone divided into segments. 
Fig. 46 £. Conjugating cells with the ascogone segmented and branching. 
Fig. 47 0, b. Transverse section of central cell surrounded by segmented and 
branching ascogone. 
Fig. 48 a. Longitudinal section of central cell surrounded by the segmented 
and branching ascogone. 
Fig. 48 b. The same in surface view. 
Fig. 49. Group of young asci developed from a pair of conjugating cells. 
Fig. 50. Young sexual coil showing origin of vegetative hyphae. 
Fig. 51 a-e. Development of asci. 
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