AN ACHLYA LACKING SEXUAL REPRODUCTION 
EXPLANATION OF PLATE XVIII 
The figures were drawn from living material at the level of the stage, with the 
aid of an Abbe camera lucida. The approximate magnification of the combination 
of lenses used is given in each case, but applies to the original figures, which have 
been reduced to about >^ their diameter in reproduction. 
Fig. I. Emptied sporangium with hollow sphere of escaped sporangiospores 
adherent to the tip. Beneath the sporangium a resistant spore has already formed. 
X 550. 
Fig. 2. Group of 5 escaped sporangiospores. From one now empty, a secon- 
dary zoospore has already escaped; another shows a papilla of dehiscence forming. 
X 1,400. 
Fig. 3. Laterally biciliate zoospore showing its peculiar shape. The groove 
from which the cilia arise is above. X 1,400. 
Fig. 4. Encysted zoospore after coming to rest. X 1,400. 
Fig. 5. Germination of such an encysted zoospore. X 1,400. 
Fig. 6. Portion of mature mycelium bearing several resistant spores. X 150. 
Fig. 7. Intercalary resistant spore. X 220. 
Fig. 8. Two intercalary resistant spores of somewhat irregular shape. X 220. 
Fig. 9. Abjunction of a terminal resistant spore by the rupture of its delicate 
outer wall. X 350. 
Fig, 10. Formation of three resistant spores in basipetal series. X 350. 
Fig. 1 1 , Germination in nutrient agar of a resistant spore by means of a vigorous 
germ tube. X 350. 
Fig. 12. Germination in pure water of a resistant spore forming a typical 
Achlya sporangium. Some of the adherent spores have been washed away showing 
their arrangement in a hollow sphere. X 350. 
