C53 



Fig-. 207. Frontal section of side of segment, through the cirrus 

 pouch and vagina: ci.. cirrus: va.. vagina: sg., geni- 

 tal sinus; sb., cells of subcuticula. After Crety, 

 1890, fig. 12. 



Fig. 20S. Longitudinal section through egg.«=ac: ni. external cap- 

 sule; c. granular content: ov.. ovum. After Crety, 

 1890, flg. 13. 



Fig. 209. Scolex of "T. pluriuncinata." x ca. 50. a, hook from 

 rostellum; b, hook from sucker; pr., rostellum; v. 

 sucker; s, head; c, neck. After Crety, 1890, fig. 4. 



Fig. 210. Ovaim of same. After Crety, 1890, fig. 7. 



Fig. 211. Frontal section of segment of same: cl., ventral canal; 

 ct., transversecanal; ur., egg sacs. After Crety, 1890, 

 flg. 14. 



Plate XVir, Figs, 212-227.— Davainea cesticillus. Davainea 

 echinobothrida. and Davainea tetagona. 



[Figs. 212-216. Davainea cesticillus.1 



Fig. 212. Strobila. After Molin, 1861, PI. VI, fig. 10. 



Fig. 213. Anterior portion of same, and two posterior segments 

 (middle portion of worm ff, omitted): A, head; b, 

 ring surrounding the rostellum; c, rostellum; d. 

 sucker; E, anterior portion of segmented body; ff, 

 dotted line of omitted segments; GO, two posteiro-r 

 segments; h. extruded pen's; i, vulva. After Molin, 

 1861, PI. VI, fig. 11. 



Fig. 211. Hnok from rostellum of Dujardin's "T. infundihuU- 

 formis Goeze.- x210. After Dujardin, 1S45. PI. IX. 

 Fig. H. 2. 



Fig. 21.';. Hook from rostellum. x92fi. After Krahbe. 1S69. Tab. 

 X, flg. 293. 



Fig. 216. Ovum. x240. After Krahbe. 1S69, Tab. X, fig. 204. 



[Figs. 217-218. Davainea echinobothrida. 1 



Fig. 217. Strobila. natural size. After Megn:n, IRSIA. PI. V. 



fig. 1. 

 Fig. 21Sa-d. Head/ with appendages: a, head an'd neck: b, 

 armature of suckers: c, hook from sucker; cl, hook 

 rostellum. After Megnin, 1,«S1A, PI. V, fig. 2. 

 [Figs. 219-227. Davainea tetragnna.l 

 Fig. 219. Head D. with rostellum fa) and suckers <c). followed 

 by neck (E). Enlarged. After Molin. 1S61. Tav VII 

 flg. 6. 



