1919] Riickes: Male Genital System in Lepidoptera 



209 



EXPLANATION OF PLATES 



Plate X. 



Fig. L A, B, C, D. Chlodkovsky's four types of Lepidopterous testes. 

 A, Hepialus; B, Satnrnia; C, Lycaena; D, Pieris. All diagramatic. 

 E, adult genital system in Samia cecropia, semi-diagramatic. X 8. 



Fig. 2. Sagittal section of testis, showing chambers, hilum, and two coats. 

 Diagramatic. 



Fig. 3. Detail of hilum of testis. Note the continuity of the basement mem- 

 brane of the chamber with that of the epithelium of the vas deferens. 

 Camera lucida drawing. 



Plate XL 



Fig. 4. The relation of the nervous and reproductive systems in an early pupal 

 stage of Philosaniia cynthia. 



Fig. 5. Detail of coats of testis of Callosaniia promethia. 



Fig. G. Detail of coats of testis of Philosamia cynthia. 



Fig. 7. Detail of apical region of a chamber in the testis of Pieris rupee, showing 

 Verson's cell giving rise to spermatocyst capsules. The black parti- 

 cles in the cytoplasm of the apical cell are portions of the parent 

 nucleus, (probably formed by amitosis) migrating to the fibrous 

 prolongations to become the nuclei of the spermatocyst capsule. 



Fig. 8. Adult (sperm stage) spermatocyst. 



PLATE XI L 



9-15. Growth of the epithelium of vas deferens from larval (or early pupal) 

 stage (9) to the late pupa, (13) when the cytoplasm contains secretion 

 droplets, to the adult stage (15), when the secretion droplets {disappear 

 and the tips of the cells vacuoli^e. ^: ■ / 



16. Trans-section of vas deferens, showing general contour of iapixhelium. 



17. Epithelium of upper end of seminal vesicle. I, y/ ■■:\:t/ 



18. Epithelium of accessory glands. • v-j/,- ■■'^1';/' 



19. A, Trans-section of ejaculatory duct, near its union witli the "ductus 

 ejaculatorius duplex." B, Epitrjielium of same.- 



Fig. 20. Trans-section of ejaculatory ducty midway along its length. Note 



the addition of circular muscle. 

 Fig. 21. Trans-section of ejaculatory duct near ejaculatory "bulb." Note the 



addition of muscles and the presence of an intima. 



Each scale line is equivalent to 100 micra. 



'igs. 



Fig. 

 Fig. 

 Fig. 

 Fig. 



ABBREVIATIONS. 



Ac. — Apical cell (Verson's cell) — 



Follicular epithelium. 

 Ag. — Accessory glands. 

 Be. — Ejaculatory "bulb." 

 Bm. — Basement membrane. 

 Co. — Capsular coat. 

 Cm. — Circular muscles. 

 Cp. — Caudal plexus. 

 Ded. — "Ductus ejaculatorius duplex." 

 Des. — Ductus ejaculatorious simplex. 

 Epi. — Epithelium (of genital ducts). 

 Fd.— Fat droplets. 

 I.— Intima. 



Lm. — Longitudinal muscles. 

 Lvd. — Lumen of vas deferens. 

 P. — Penis. 



Pg. — Pigment granules. 

 Sd. — Secretion droplets. 

 Sp. — Spiracle. 



Spc. — Spermatocyst capsule (follicular 



epithelium). 

 Spg. — Spermatogonia. 

 Spn. — Nucleus of spermatocyst capsule. 

 Spv. — Vestigial spiracle. 

 Sv. — Seminal vesicles. 

 T.— Testis. 



Tm.— Tracheal membrane. 

 Tr.— Tracheae. 

 Ttc. — Testicular tube coat. 

 Vd. — Vas deferens. 

 Vp. — Vesicular plexus. 



For Fig. 4. 



7, 8, 9, 10 — Abdominal nerves. 

 A — Anterior. 

 P — Posterior. 

 S — Sympathetic . 



