Bull. U. S. B. F., 1909. 
Plate XL,VI. 
Fig. 3. 
Fig. i. — From transverse section of ovary of lobster inches long, July 25, showing cluster of epithelial cells on crest of fold, 
and their differentiation into primordial ova ( e l ) and follicle cells ( fol . ep), with formation of egg-sacs (fol); b. m, basement 
membrane; Bl. s, blood sinus; ov. ep, epithelium of ovary. Enlarged about 230 times 
Fig. 2. — Part of longitudinal section of first larva, at point of attachment of adductor mandibuli muscle (ad. m), showing fibillar 
modification of epithelium ( fb . ep), and basement lamella (6m); bl. v, blood vessel; cut, cuticle; ms, mesoblast. Enlarged 
about 230 times. 
Fig. 3. — Part of transverse section of dactyl of soft lobster, close to spines of dentate margin, showing the enamel ( En ), pigmented 
and calcified layers of shell (p. and c. /), chitogenous epithelium (ch. ep.), and involuntary muscle spongework (;. mu), with 
blood lacunae (bl. 1 ), in “fine meat” of claw tip; 6. c, blood corpuscles; s, seta. Enlarged about 115 times. 
