470 Keene . — Studies of the Zygospores of Sp or o dim a Grandis . 
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P* 77* 
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de Mucoracees. Ann. Mycol., vol. ii, 1904, p. 487. 
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EXPLANATION OF FIGURES IN PLATES XXXV 
AND XXXVI. 
Illustrating Miss Keene’s paper on Sporodinia grandis. 
(All figures were drawn with the aid of the camera lucida and with the Zeiss apochromatic 
objectives and compensating oculars. Figs. 3, 4, 5, 6, 7, 8, 9, 10, 11 were drawn with obj. 16 mm., 
oc. 12. Figs. 1 a, fa, 7 3, 8 a, ga, jo a, 10 b, 11 a, 11 b were drawn with obj. 1*5 mm., oc. 4. Fig. 1 
was drawn with obj. 16 mm., oc. 8.) 
PLATE XXXV. 
Fig. 1. Germinating spore with two germ-tubes, showing numerous nuclei. 
Fig. 1 a. Nuclei of germ-tubes. 
Fig. 2. A small portion of the mycelium, showing size and structure of nuclei. 
Fig. 3. Young branches at copulation. 
Fig. 4. Gametangia with separating wall dissolved, showing fusion of cytoplasmic masses. 
Also shows formation of wedge-shaped vacuoles. 
Fig. 5. Portion of suspensor and gametangium, showing formation of new delimiting wall and 
its relation to isthmus of protoplasm. 
Fig. 6. Gametangia following the resorption of the separating wall, showing the penetration of 
one gamete into the other. 
Fig. 7. The young zygospore at the time of nuclear fusions. 
Fig. 7 a. Nuclei of the zygospore, showing fusions. 
Fig. 7 b. Mucorine crystals. 
Fig. 8. Zygospore at the time of zonation and first appearance of the oil plastids. 
Fig. 8 a. Nuclei. 
PLATE XXXVI. 
Fig. 9. Partly mature zygospore, showing increase in size and number of the oil plastids. 
Fig. 10. Oil plastids and area of densely staining material, probably disorganizing nuclei. 
Fig. 10 a. Nuclei from zygospore. 
Fig. 10 b. Oil plastid shown under same magnification as nuclei. 
Fig. 11. Mature zygospore, showing single large plastid and several small ones. 
Fig. 11 a. Nuclei of mature zygospore. 
Fig. 11b. A portion of the plastid shown in Fig. 11, under higher magnification in order to 
bring out its reticulate nature. 
Fig. 1 1 c. Disorganizing nuclei. 
