Abstract
External Features •
1. General, 11 •
2. Phases of life history . 22 •
3. Configuration of buds . . 24 •
4. Grouping of segments considered numerically . . 36
Description of two abnormal buds , 55
Alimentary canal , . 58
Body wall •
1. Epithelium , . . . 63 •
2. Musculature ,
. . . . . . 70 •
3. Central nervous system . . . . . 85
Blood system . . . . . . 05
Coelomic cavities . . . . 114
Glandular sac and excretion. . . . 116
Histology of bud -formation, together with cytological
observations on the nuclei of the embryonic cells. 123.
Summary. 152.
