1896] PROCARP AND CYSTOCARP OF PTILOTA ny A hie 
Fic. 3. End of procarpic branch showing first stage in the formation of 
the group of procarps; cell 11 gives rise to the inner procarp; cell ¢ is the 
carpogenous cell; stained with eosin. 
Fig. 4. End of procarpic branch showing structure of the cell-wall ; 
branch 10’ becomes first procarp of the pair; stained with Béhmer’s hema- 
toxylin. 
Figs. 5-10 from specimens stained with eosin. 
Fig. 5. End of procarpic branch: cell 10’* gives rise to the second pro- 
carp of the pair; cell to’’ develops into a lateral procarp. 
Fic. 6. Stage very similar to fg. 5, inner procarp (no. 11) consists of two 
cells. 
Fig. 7. Stage somewhat older in development than. fig. 6; a trichogyne 
(10’) has developed from the terminal cell of the first procarp of the pair. 
Fig. 8. A stage very similar to fg. 7, but viewed from the opposite side ; 
lateral procarp 10’’ consists of three cells. 
FiG. 9. Group of procarps illustrating development of the trichogynes. 
Fie, 10. Anadult group of procarps; shows the appearance and arrange- 
ment of the bracts below the group. 
Figs. 11-16 from specimens stained with Béhmer’s hematoxylin. 
Fic. 11. A single immature procarp; terminal cell () becomes the 
ot: ta, the cell of the trichophoric apparatus; ¢, the carpogenous 
Fig. 12. Trichogyne pushing through the outer zone of the cell-wall. 
Fig. 13. A mature trichogyne. 
Fic. 14. The protoplasmic connection between the trichogyne and the 
cell of the trichophoric apparatus has been severed, and a wall of cellulose 
has been formed between the two structures. 
Fig. 15. Withered trichogyne with zoogloea of bacteria at the tip. 
lag 16-22 from specimens stained with Mayer's acid hemalum and 
n. 
Fig. 16. First stage in development of cystocarp ; +, first cell of cysto- 
Carp; c, Carpogenous cell; ¢a, trichophoric apparatus; on the right side 
drawn in outline are other procarps. 
Fig. 17. First stage of cystocarp with old trichogyne attached to the 
Procarp, 
FIG. 18. Two-celled stage of cystocarp with old trichogyne attached to 
the Procarp, 
- the 10 1% Four-celled stage of cystocarp with old trichogyn¢ attached to 
the Procarp, 
