Jan. 2-Mar. 26, 1917 
Illustrations 
XIII 
Page 
19. Graph showing the growth of Neofabraea malicortids on corn-meal agar 
in petri dishes. x 57 
20. Graph showing the growth of PeniciIlium expansum on corn-meal agar 
in petri dishes... 1 57 
21. Graph showing the growth of Sclerotinia cinerea on corn-meal agar in 
petri dishes. x 57 
22. Graph showing the growth of Sphaeropsis malorum on corn-meal agar in 
petri dishes. x 5 8 
23. Graph showing the growth of Volutella fructi on corn-meal agar in petri 
dishes. x 5 8 
24. Graph showing the comparative growth of the different rot fungi on 
corn-meal agar petri dishes, first experiment. 159 
25. Graph showing the comparative growth of the different rot fungi on 
corn-meal agar petri dishes, second experiment. 160 
SOROSPOREIXA UvELEA AND ITS OCCURRENCE IN CUTWORMS IN AMERICA 
Fig. i. Sorosporella agrotidis {after Sorokin). 189 
Measurement of the Inactive, or Unfree, Moisture in the Son, by 
Means of the Dieatometer Method 
Fig. 1. The dilatometer. x 9 ^ 
Studies of the Genus Phytoptithora 
Fig. 1. Graph showing the variation in length of conidia of Phytophthora infes- 
tans, P.fagi, P. parasitica , and P. jatrophae . 243 
2. Graph showing the variation in length of conidia of Phytophthora pha¬ 
seoli, P.cactorum {Phyllocactus sp .),P.faberi, and P . erythroseptica - 245 
3. Graph showing the variation in length of conidia of Phytophthora nico- 
tianae, P. cactorum {Panax sp.) P. arecae, and P. syringae. . 249 
4. Graph showing the variation in width of conidia of Phytophthora fagi, 
P. phaseoli , P. faberi , and P. jatrophae . 250 
5. Graph showing the variation in width of Phytophthora infestans, P. cac¬ 
torum {Phyllocactus sp.), P. erythroseptica, and P. arecae . 251 
6. Graph showing the variation in width of Phytophthora parasitica, P. 
syringae, P. cactorum {Panax sp.), and P. nicoiianae . 252 
7. Diagrammatic illustration showing that the ratio of the long to the short 
diameter of ellipsoidal and spherical bodies offers a quantitative means 
for designating their shape. 252 
8. Diagram of the arrangement in classes of the ratios of the length to the 
width of the various conidia, showing the limits of variation and modes 2 53 
9. Camera-lucida drawings showing differences in the shape of the termi¬ 
nal papilla. 2 54 
10. Graph showing the variation in the diameters of chlamydospores of 
Phytophthora nicotianae, P. parasitica, P. faberi, and P. jatrophae - 257 
11. Graph showing the variation in the diameters of oospores of Phytophthora 
phaseoli , P. arecae, and P. erythroseptica . 258 
12. Graph showing the variation in the diameters of oospores of Phytophthora 
cactorum {.Phyllocactus sp.), P. cactorum {Panax sp.), P. fagi , and 
P. syringae . 2 59 
13. Graph showing the variation in the diameter measurements of the 
oospore-like bodies of Phytophthora infestans . 265 
