654 



Viti. I'L'ii. Thi-et- j)osterior segments A, shdwiiin- KiMiital pmi'S d) 

 and egg- sacs (b). England. AfttM' Mulin, ISKl, 'I'av. 

 VII, tig-. 7. 



Kig. liL'l. Isolated egg sac with (a) transijaient metnbrane; l>, 

 granular substance; c, embryo in ovum (d). Kn- 

 larged. After Molin, 1861, Tab. VII, tig. s. 



Kigs. 222-223. Head and neck showing armed rostellum and 

 armed suckers. x35. After Krabbe, 1882, Tab. II, 

 tigs. 55, 56. From material collected by KedtschMiku 

 in Turkestan. 



Fig. 224. Hook from rostellum "f same. x920. After Krahbc, 

 1882, Tab. II, fig. 59. 



Fig. 225. A segment showing two longitudinal canals, several 

 testicles, vas deferens cirrus pouch and genital pore. 

 x3S. After Krabbe, 1882, Tab. II, fig. 57. 



Fig. 226. Posterior segment, showing genitl pore and egg sacs. 

 x35. After Krabbe, 1882, Tab. II, fig. 58. 



Fig. 227. Female genital organs: vg., vagina; r s., receptaculum 

 seminis; bd trsv., transverse collecting canal; cl. ov., 

 opening of the ovarian tubules; c. s., seminal canal; 

 ovd., disc, descending oviduct; glv., vitellogene 

 gland; vt. Id., vitello-duct; ovd. asc, ascending ovi- 

 duct; sb. ovd,, opening of the ascending oviduct; ebc. 

 vtld., opening of the vitello-duct; ootp,, ootyp with 

 shell gland. After Diamare, 1893, fig. 4. 



Plate XVIII, Figs. 228-246.— Davainea tetragona, Davainea 

 Friedbergeri and Davainea crassula. 



[Figs. 228-235. Davainea te.tragona.) 



Figs. 228-229. Supposed larvae of "Taenia bothrioplitis" (=Da- 

 vainea tetragona) from a snail (Helix). Treated 

 with acetic acid. After Piana 1882, Figs. F, 8, A., 

 and F, 8, B, reduced. 



Fig. 230. Piece of the intestine of a fowl showing the nodules 

 (reduced one-third). After Moore, 1895, fig. la. 



Fig. 231. The mucosa of the intestine showing ulcerated areas; 

 also several small and one larger tapeworm attached 

 to the intestine (reduced one-third). After Moore, 

 1895, fig. lb. 



Fig. 232. A cross section of the intestine illustrating the thick- 

 ening of the wall, due to a parge number of the 

 nodules; also a portion of a tapeworm which has 

 penetrated the muco»— > mpmbran" (enlarged), .\fter 

 Moore, 1885, fig. Ic 



