<)52 



Fig. 192. Anterior exliLinity nf tiy. J'.M. I\i>iit;-ki. :;, S. Alt.-r 



Grass! & Rovelli, 1892, lig. 16. 

 Fig-. 193. Segmenls from Rudolphi's specimen of "Taenia in- 



fundibuliformis" in Otis tarda. After Krabbe, 1868, 



Tab. Ill, flgr. 5. See text p. 44. 



[Figs. 194-198. Davainea proglottina.] 



Fig. 194. Adult worm: g., ovary; p., cirrus pouch; r., recepta- 

 culum seminis; t., testicle; v., vagina; vi., vitello- 

 gene gland. x95. After R. Blanchard, 189B, fig. 4. 



Fig. 195. Head of same with extended rostellum and one partly 

 detached segment. After R. Blanchard, 1891B, fig. 5. 



Fig. 196. Head with retracted, rostellum; the first segment is 

 forming from the neck. After R. Blanchard, 1891B, 

 fig. 6. 



Fig. 197a-b. Three isolated hooks: a, from rostellum; b, suckers. 

 After R. Blanchard, 1891B, fig. 7. 



Fig. 198. Isolated egg. After R. Blanchard, 1891B, fig. 8. 



Plate XVI, Figs. 199-211. — ^Davainea proglottina and Davainea 

 circumvallata. 



[Figs. 199-202. Davainea proglottina.] 



Fig. 199. Cysticercoid, in which the oncospheric hooks are still 



visible: ros., rostellum; ven., suckers; Koritska 3, 8. 



After Grassi & Rovelli, 1892, Tav. IV, fig. 7. (Fresh 



specimen.) 

 Fig. 200. The same, preserved: boc, opening of the cysticercoid; 



cav., "cavity of the g^astrula;" lac, "primitive 



lacune;'-' sco., scolex. Koritska, 3, S. After Grassi 



& Rovelli, 1892, Tav. IV, fig. 8. 

 Fig. 201. Longitudinal section: boc, opening of cysticercoid; 



cav., "cavity of the gastrula;" sco., scolex. Hart- 



nack, 2, 7. After Grassi & Rovelli, 1892, Tav. IV, 



fig. 9. 

 Fig. 202. Young cysticercoid: ven., sucker; cod., tail. Kori'tska, 



3, 5. After Grassi & Rovelli, 1892, Tav. IV, fig. 10. 



[Figs. 203-211. Davainea circumvallata.] 



Fig. 203. Ovum. x240. After Krabbe, 1869, Tab. X, fig. 295. 

 Fig. 204. Head and neck: pr., rostellum; r, line of hooks; v, 



sucker; c, neck. After Crety, 1890, fig. 9. 

 Fig. 205. Hook from rostellum. After Crety, 1890, fig. 10. 

 Fig. 206. Ovum. After Crety, 1890, fig. 11. 



