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xiii. 



EXPLANATION OF PLATE III. 



All figures except general dissections were drawn with a camera lucida. 



Fig. 1. Dissection showing dorsal view of reproductive organs with left 

 ovary removed: ov, ovary; nc, nutritive chamber; od, oviduct; cod, oviductus 

 communis; sp, heart-shaped part of spermatheca; acg, accessory glands teased 

 apart; cs, coUeterial sac; m, muscle bundles of saw; 5, sheaths of saw. (x4. ) 



Fig. 2. Longitudinal section of cells through the funnel-shaped portion 

 of the spermatheca near the region where it opens into the common oviduct : 

 ■ep, epithelium; b, bristle; p, primary layer of chitin; s, secondary layer of 

 chitin. (x647). 



Fig. 3. Longitudinal section of the dorsal part of common oviduct posterior 

 to the entrance of the spermatheca: ep, epithelium; ch, chitinous intima; b, 

 bristles. (x900.) 



Fig. 4. Longitudinal section of the chitinous intima of the spermatheca, 

 showing the change in direction of the bristles at a, near the constriction e, 

 which divides the spermatheca into the heart-shaped dorsal portion and the 

 funnel-shaped ventral part: v, bristle near the constriction and pointing ven- 

 t rally; d, bristle below constriction and pointing dorsally ; b, bristle dorsal to the 

 ■constriction, these bristles being arranged irregularly upon the unfolded chitin; 

 p, primary layer of chitin; 5, secondary layer of chitin; c, pore canal. (x520). 



Fig. '5. Cross section of a fold of the oviduct with the peritoneum not 

 shown : ch, chitinous intima ; b, bristles ; ep, epithelium ; Im, longitudinal muscles ; 

 ■cm, circular muscles. (x647). 



Fig, 6. Longitudinal section of the cells of the coUeterial sac: n, nucleus 

 of epithelial cell; ch, chitinous intima. (x867. ) 



Fig. 7. Epithelium and chitinous intima of the dorsal region of the heart- 

 shaped part of the spermatheca: p, primary layer of chitin; s, secondary layer 

 •of chitin; c, pore canal; Is, longitudinal st nations of cytoplasm. (x647.) 



