U54 



Fig. 220. Three posterior segments A, showing genital pores ic) 

 and egg sacs (b). England. After Molin. 1S61. Tav. 

 VII, Hg. 7. 



Fig. 221. Isolated egg sac with (a) transparent membrane; b. 

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

 larged. After Molin, 1861, Tab. VII, fig^ 8. 



Pigs. 222-223. Head and neok showing armed rostellum an.i 

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

 tigs. 55, 56. From material collected by Fedtschenko 

 in TurUestan. 



Fig. 224. Hook from rostellum of same. x920. After Krabbe. 

 1882, Tab. II, fig. 59. 



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

 testicles, vas deferens cirrus pouch and genital pore. 

 x35. After Krabbe, 1882, Tab. II, fig. 57. 



Fig. 226. Posterior segment, showing geniti 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; sbc. 

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

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



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

 Priedbergeri and Davainea crassula. 



[Figs. 228-235. Davainea tetragona.1 



Figs. 228-229. Supposed lar\-ae of "Taenia bothrioplitis" (=Da- 

 vainea tetragona) from a snail (Helix). Treated 

 with acetic acid. After Plana 1882, Figs. P, 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 ulcerat.ed 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 numtoer of the 

 nodules; also a portion of a tapeworm which has 

 penetrated tl-e muooi'"5 membrane fenlargerl). .\fter 

 Moore, 1S85, fig. Ic 



