Bull- U. S. B. F., 1909. 
Plate XLV. 
ov. w 
Fig. 3. 
/ 
GL'.ejj 
Fig. 4. 
Fig. s. 
Figs. 1-5. — Diagrams to illustrate structure and growth of ovary of the lobster from first larval stage to maturity. Note the 
primordial epithelium in larva (p. ep, fig. 1), the germogenal folds ( Ger.fd . fig. 3), and reentrant blood sinuses (Bl. .y) formed 
by foldings of this layer, the multiplication of epithelial cells along the crests of these folds, and their differentiation into ova 
and follicle cells (see fig. 1, pi. xlvi), the development of glandular pouches after eggs are laid (fig. 4), and their recession 
when thelatterare ripe. Figure 1, from larva; figures 2 and 3, from early and late adolescent stages; figure 4, from adult with 
ovary nearly ripe; figure 5, from adult, 36 hours after extrusion of ripe eggs. Bl. v, blood vessel; fol, egg-follicle; Gl. ep, glandular 
epithelium; 01;. ep, ovarian epithelium; ov. w, ovarian wall. 
