C.dL' 



Fig. 1112. Aiilei-iur extn-mity .>C tis. i;U. Koiit^ki. .!. S. After 



Grassi & Rovelli. 1S92. lig. 16. 

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



fundibuliformis" in Otis tarda. After Krabbe. 1S6S. 



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



[Figs. 194-19S. Davainea proglottina."] 



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

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

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



Fig. lOTi. Head of same with extended rostellum and one partly- 

 detached segment. After R. Blanchard, 1S91B, fig. 5. 



Fig. 19B. Head with retracted rostellum; the first segment is 

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

 flg. 6. 



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

 After R. Blanchard, 1S91B, fig. 7. 



Fig. 198. Isolated egg. After R. Blanchard, 1S91B, fig. S. 



Plato XVI. Figs. 199-211.— Davainea proglottina and Davainea 

 circumvallata. 



IFigs. 199-202. Davainea proglottina.] 



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



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



After Grassi & Rovelli, 1892, Tav. IV, fig. V. (Fre?h 



specimen.) 

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



cav., "cavity of the gastrula;" lac, "primitive 



lacune;" sco,, scolex. Koritska, 3, 8. After Grassi 



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

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



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



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



fig. 9. 

 Fig. 202. Young cysticereoid: ven., sucker; cod., tail. Koritska, 



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



[Figs. 203-211. Davainea circum\Tallata.l 

 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, 1S90. fig. 9. 

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

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



