THE PLACENTAS IN THE TRIBE ALSINES. 429 
Fig. 10. Transverse section through the base of a capsule, taken from a bud that 
would soon open. The dissepiments are still attached. 
Fig. 11. Longitudinal section of a capsule, taken from an open flower. 
Fig. 12. Longitudinal section of a male flower, showing the elongated floral 
axis: the sepals are removed. 
Prate XXXIII. 
1-8, Development of Capsule of Sagina apetala; 9-14 of Spergula arvensis. 
Figs. 1-4. Young capsules in various stages of development. 
Fig. 5. Longitudinal section of capsule drawn in fig. 4: the dissepiments have 
risen to the apex of the central axis. 
Fig. 6. Long. section of capsule at time when uppermost ovules are appearing. 
Figs. 7 and 8. Longitudinal sections of capsules in later stages of development. 
Fig. 9. Very young capsule, showing the carpellary prominences arising round 
the base of the central elevation. 
Fig. 10. An older capsule, viewed from above ; Fig. 11, side view. 
Fig. 12. Long. section of capsule viewed in fig. 11: ovules very rudimentary. 
Figs. 13 and 14. Longitudinal sections of older capsules. 
Puare XXXIV. 
1-8. Development Capsule of Cerastium triviale ; 9-15. Cerastium quaternellum. 
Figs. 1-4. Capsules in successive stages of development. 
Fig. 5. Transverse section through lower part of capsule drawn in fig. 4. The 
ovules here are barely discernible. 
Figs. 6-8. Longitudinal sections through older capsules. Fig. 8 is a section of 
a ripe capsule. 
Fig. 9. Young capsule, showing the pocket-like loculi. 
Fig. 10. An older capsule, viewed from above. 
Fig. 11. Longitudinal section of the capsule drawn in fig. 10: the rudiments of 
the uppermost ovules are discernible. 
Fig. 12. An older capsule. 
Fig. 13. Longitudinal section of the capsule drawn in fig. 12. 
Figs.14 and 15. Longitudinal sections of capsules in older stages of deve- 
lopment. 
PrarE XXXV. 
Capsules or longitudinal sections of the capsules of the species, investigated at 
the time when the ovules are first apparent, placed together for comparison :— 
l. Dianthus barbatus. 2. Lychnis diurna. 3. Sagina apetala. 4. Spergula 
arvensis. 5. Arenaria verna. 6. A. serpyllifolia. 7. Stellaria media. 8. 
S. uliginosa. 9. Cerastium triviale. 
