Thaxter , on Chillies ( Capsicum sppi). 403 
The infection as a rule starts from the flowers, but sometimes also from 
the flower-buds. 
Only conidia are developed in nature on the host, but sporangia, 
chlamydospores, and zygospores have been observed in cultures. The 
conidia bear a hyaline appendage at the base. 
The sporangiospores have a cluster of appendages (‘ cilia ’) at each end. 
They are almost of the same size as the conidia. 
The zygospores are developed in cultures only when the mycelium 
arises from conidia taken directly from the host plant. 
EXPLANATION OF PLATE XIX. 
Illustrating Mr. Dastur’s Paper on Choanephora cucurbilarum. 
Fig. 1. Conidial head with primary and secondary columella, x 490. 
Fig. 2. Conidia. x 710. 
Fig. 3. Surface view of a secondary columella bearing conidia. x 490. 
Fig. 4. Germinating conidia. x 490. 
Fig. 5. Sporangiophores with columella and remnants of the sporangial wall, x 490. 
Fig* 6. Sporangiospores. x 710. 
Fig. 7. Mature zygospore, x 490. 
Fig. 8. Immature zygospore, x 490. 
Fig. 9. An early stage in the development of the zygospore, x 490. 
