406 The Botanical Gazette. [December, 
Chondromyces aurantiacus (B. & C.) 
Fig. 25. General appearence of a portion of rod mass growing in fluid agar. 
Fig. 26. Living rods from active rod-mass. a, rod dividing. Fig. 27. Vegeta- 
tive rods in glycerine (2) showing granular contents stained with borax carmin. 
Fig. 28, Rods isolated in mature crushed cysts. 
‘ Myxococcus coralloides n. sp. 
Fig. 29. Highly developed spore mass. Fig. 30. Spore mass of a different 
form more highly magnified. Fig. 31. Spore mass rising from rod mass at its 
ase. Fig. 32. Vegetative rods. Fig. 33. Mature spores. @, spores in process 
of formation. 
PLATE XXV. 
Myxobacter aureus n. sp. 
Fig. 34. General habit showing four cysts embedded in gelatinous matrix. 
Fig. 35. Rods (living) from rising rod-mass, Fig. 36. Rods from cysts crushed 
at maturity. 
; Myxococcus rubescens n. sp. 
Fig. 37. General appearance of young spore mass viewed from above and sur- 
rounded by vegetative rods. Fig. 38. Normal habit of spore mass viewed later- 
ally. Deliquescence beginning at the top. Fig. 39. Vegetative rods. Fig. 40. 
Different stages of supposed spore formation. Fig. 41. Mature spores. 
Development of the flower and embryo-sac iu Aster and 
Solidago. 
G. W. MARTIN, 
(WITH PLATES XIX AND Xx.) 
Concluded from page 358. 
Let us now turn to the development of the ovule and the 
embryo-sac. A short time before the floral organs attain their 
maximum length, there appears at the bottom of the ovarian 
Cavity a rounded excrescence; this is the incipient ovule, the 
Promise of a future seed (fig. 11). This incipient ovule 
does not arise fromthe bottom of the ovarian cavity, buta lit- 
tle above the lowest point. Therefore, the ovule is not the 
terminal structure on the floral axis. For, by careful focusing, 
the apex of the fascicular system is seen to end very abr uptly 
at the bottom of the ovary cell. To the right and left of the 
axial bundle of the pedicel, a little below the apex, are given 
off fibro-vascular bundles which traverse both sides of the 
carpellary leaf. It is in the region of one of these lateral 
bundles, beneath the epidermis, that the primitive cells de- 
velop, which arch upward and give rise to the funiculus and the 
nuclear ovule. Subsequently, a branch of “this lateral bundle 
*The ovule somewhat advanced. 
