410 BOTANICAL GAZETTE [JUNE 
EXPLANATION OF PLATES XXX AND XXXI. 
The figures are from ink drawings reduced about one-fourth by photo- 
lithography. The letters and numbers refer to the Zeiss or Leitz objectives 
and eyepieces used in making the original drawings. The approximate 
magnifications in diameters of these combinations, allowing for projection, 
are (in the original) as follows: A, oc. 4, 180:C, oc. 2, 230:C, oc. 4, 400: D 
oc. 2, 380:D, oc. 4, 700 :5 (oil), oc. 4, 1900344 Gail, Oc. ¥2; 3300. 
Chondromyces apiculatus Thaxter. 
Fig. 1. Rising rod mass. A 4. | 
Fic. 2. Branching cystophore, the cysts just beginning to bud out from 
right head. A 4. 
Figs. 3-4. Typical cystophores with cysts in different stages of develop- 
ment. A4 
Fie. 5. Cystophore bearing mature cysts of the turnip-shaped type. A 4. 
Fic. 6. Young cyst before the rods have retreated from either end. D 4. 
Fics. 7-12. Mature or nearly mature cysts, figs. ro, rz of the turnip 
form, the rest of the subcylindrical type; fg. 8 showing the union of two 
and jig. 12 of three cysts by lateral fusion. All D 4. 
Fig. 13. Cyst “ germinating” at both ends in the normal fashion. D 4- 
Fic. 14. Rods from rising rod mass, stained with Delafield’s hema- 
toxylin. +5, 12. 
Fig. 15. Encysted rods from mature cyst, stained with hzematoxylin. 
ty; 12: 
Chondromyces erectus Thaxter. 
Fie. 16. Cystophores bearing mature cysts showing habit. C 2. 
Fig. 17. Young cystophores on which the cysts are just beginning ‘° 
2, 
Fie. 18. Mature cyst isolated. D 4. 
Fic. 19. Group of rods. +4, 4. 
Chondromyces gracilipes Thaxter. 
Fic. 20. Mature cystophores and cysts. C 2. 
Fics. 22-23. Mature cystophore and cyst. D 4. 
Fig. 24. Group of vegetative rods. -j;, 4. 
Myxococcus cirrhosus Thaxter. 
Fig. 25. Three mature spore masses. C 4. 
Fig. 26. Group of rods. +4, 4. 
Fig. 27. Group of spores. ;, 4. 
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