650 



fPigrs-. l.'.4-164. Urepanidotaenia setig-era.] 



Fig. 154. Adult \vn.;Tn. natural size. After Frnlioh, 1789. Tab. 

 IV, fig. 1. 



Fig. ]'."."). Head of same, enlarged, with (a) rostellunn and (b) 

 suckers. After Frolich, 1789, Tab. iV, fig. 2. 



Fig. iHQ. Three young segments of same, greatly enlarged. 

 After Frolich, 1789, Tab. IV, fig. 3. 



Fig. 1,')7. Six segments from posterior end, enlarged, with (a) 

 extruded or (b) pa-rtly extruded cirri. After Frolich, 

 1789, Tab. IV, fig. 4. 



Figs. 158-160. Three isolated segments with genital organs: a, 

 cirrus pouch; c, testicles; e, vas deferens with vesi- 

 cula seminalis; g, vagina; i, vitellogene gland; k, 

 ovary; m, receptaculum seminis. After Feuereisen, 

 1868, Taf, X, figs. 14, 15, 16, of "Taenia fasciata." 



Fig. 161. Hook from scolex. After Feuereispn, 1868. Taf. X, 

 fig. 2. 



Fig. 162. Transverse section of segment: p., cii'rus; v., vagina; 

 1. m., longitudinal muscles; k., excretory (longitu- 

 dinal) canals; ov., ovary. Hartnack2, 2. After 

 Lonnberg, 1889, Taf. 1, fig. 7. 



Fig. le."?. Oysticercoid, with very long tail, from Cyclops brevi- 

 caudatus. After von Linstow, 1892B, fig. 1. 



Fig. 164. Hook from the same. After von Linstow, 1892, fig. 2. 



Plate XTV, Figs. 165-186. — I>:-epanidotaenia tenuirostris ami 

 Drepanldotaenia infundibuliformis. 



[Figs. 165-172. Drepanidotaenia tenuirostris.] 



Fig. 165. Cysticercoid with tail. x325. After Hamann, 1889, 



Fig. A. From the body cavity of Gammarus pulex. 

 Fig. 166. Calcareous corpuscles of same. x800. After Hamann, 



1889, Fig. B. 

 Fig. 167. Hooks from the rostellum. xSOO. After Hamann, 



1889, Fig. C. 

 Fig. 168. Cysticercoid with long tail. Zeiss 3, A. After Mrazek, 



1891, Tab. V, fig. 3. 

 Fig. 169. Cysticercoid with anterior portion of tail. Zeiss 3, D. 



After Mrazek, 1891, Tab. V, fig. 4. 

 Fig. 170. Two hooks, of same. ZeiFs 3, F. After Mrazek, 1891, 



Tab. V. fig. 5. 

 Fig. 171. The same, greatly magnified. After Mrazek, 1891, 



Tab. V, fig. 6. 

 Fig. 172. Very young stage of cysticercoid of Drep. tenuirostris 



(?). The oncospheric hooks are preserved. After 



Mrazek. 1891, Tab. VI, fig. 24. 



