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310 T. B. ROSSETER ON HYMENOLEPIS FARCIMINALIS. 



gc s proglottides of T. farcimiaosa, from Goeze's Natur- 

 geschichte, tab. 31b, tig. 21. 

 Fig. 2. Male genital tract; ^., testes; v.d., vas-def erens ; vsc, 

 vesicles of same; v.s., vesicula seminalis ; d.e., ductus 

 efferentia of same; e.b., expulsion bladder; c.p. cirrus 

 pouch; c, cirrus, x 75. 



3. Female genital tract ; v., vagina ; v.c, vaginal canal ; 

 r.s., receptaculum seminis ; or., ovaries with their 

 raceme ducts; ov.d., ovarian duct; s.g., shell-gland; 

 y.g., yelk-gland; u.c, early uterine canal, x 75. 



4. Ovum or six-hooked brood from Fig. 1, f, with three 

 envelopes and embryo, x 350. 



5. Embryonic hook, x 1,400. 



6. Invaginated rostellum, x 350. 



7. Various hooks from scolex of II. farciminalis ; a, Crep- 

 lin's ; b, Von Siebold's ; c, Kuchenmeister's specimens, 

 after Krabbe, x 920; d, from Rosseter's specimen, x 700. 



8. Hook from scolex of H. serpentidus, Schrank, for con- 

 trast, after Krabbe, x 920. 



9. Fascicule of a, anterior; b, posterior long muscles, x 155. 



10. p, pigmentary ; c.c, calcareous corpuscles from neck of 

 tape-worm (diagrammatic), as seen with y^-inch objective. 



11. Successive stages in the development of the scutiform 

 cartilaginous body. ~No. 1 distal, ~No. 2 proximal lateral 

 borders of segment during development of genital organs 

 and previous to copulation, x 175. No. 3 distal, No. 4 

 proximal lateral borders of hermaphroditic segments 

 during and after copulation ; No. 4 shows the position 

 of genital pore and sinus, also organs of copulation, at 

 this stage. Lettering as Figs. 2 and 3 ; g.p., genital 

 pore; amp., ampulla, x 175. No. 5 distal, No. 6 proxi- 

 mal lateral border of uterine segment, x 90. In these 

 segments the scutellum is undergoing absorption, and 

 has sprung away owing to relaxation of muscles from 

 the lateral border. 



12. Scutellum with transverse muscles attached, x 350. The 

 connective fibrous radicles are as seen with a ^-inch 

 objective, and consequently diagrammatic. 



Journ. Quekett Microscopical Club, Ser. 2, Vol. X., No. 63, November 1908. 



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