PLATE IV. 
FlO. 22. — CEdipoda sordida. Longitudinal section of the uterus j Gr. t granular layer 
Ep., epithelium ; conn., tunica propria ; muc, longitudinal muscular coat 
FlO. 23. CEdipoda sordkla. Surface view of uterine epithelium. 
Fig. 24. Section through the upper part (first segment) of seminiferous tuhe; Cy$. 
■walls of the spermatocysts ; Tu., external tunic. 
Fio. 25. — Caloptenus spretus. Seminiferous tube, isolated; conn., connective tissue ; I 
II, III, and IV, the four segments of the tubes. 
Fig. 26. — Young spermatoblast. . 
FlO. 27. — Spermatoblasts just divided. 
A, Spermatoblast in process of dividing. 
FlG. 28. — Older spermatoblasts. 
Fig. 29. — Transverse section of bundle of young spermatozoa. 
Fig. 30. — Transverse section of older bundle. 
Fig. 31. — Section of the Upper part of a vesicula seminalis. 
Fig. 32. — Epithelium of the upper part of a vesicula 6eminalis. 
Fig. 33. — Transverse section of the ejaculatory duct, Ej., D; Ep., epithelium; muc. 
circular muscle ; TV. TrJ, trachea?. 
Fig. 34. — Transverse section of the muscular portion of a vesicula seminalis. 
