650 



|l'iS!=. l,i<-li;<. Oi-epnnidotaenia setiffcra.] 

 Fig. 154. Adult womi, natural sizt\ After Frolicli, 17S9. Tab. 



IV. fig. 1. 

 Fig. 165. Head of same, enlarged, with la) rostellum and lb) 



suckers. After Frolich, 17S9. Tab. iV, fig. 2. 

 Fig. 156. Three young segments of same, greatly enlarged. 



After Frolich. 17S9, Tab. IV, fig. S. 

 Fig. 157. Six segments from posterior end, enlarged, with (a) 



extruded or (W pa'i-tly extruded cirri, .\fter Frolich. 



17S9, Tab. IV, fig. 4. 

 Figs. 15S-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 Feuerelsen. 



1S6S, Taf. X. figs. 14 15. 16, of 'Taenia fasciata." 

 Kig. 161. Hook from seolex. After Feueveisen. 1S6S. Taf. X. 



fig. 3. 

 Fig. 162. Ti-ansverse section of segment: p.. cirrus; v.. vag;na; 



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

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



Lonnberg. 1SS9. Taf. I. fig. 7. 

 Fig. 16;!. 0>"sticercoid. with very long tail, from Cyclops brevi- 



oaudatus. After von I.instow. 1S92B, fig. 1. 



Fig. 161. Hook from the ?ame. After von I,instow. 1S92. fig. 2. 



Plate XIV. Figs. 16;";-1S6.— r>;-epanidotaenia tenuiro.'stris and 



Drepanidotaenia infundibuliformis. 



[Figs. 165-172. Di-epan:dotaenia tenuirostris.] 



Pig. 165. Cssticercoid with tail. x325. After Hajiiaivn. 1SS9. 



Fig. A. Fi-om the body cavity of Gammarus pulex. 

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



1SS9. Fig. B. 

 Pig. 167. Hooks from the rostellum. xSOO. After Hamann. 



1SS9, Fig. C. 

 Fig. 16S. Osticerooid with long tail. Zeiss 3. .\. .A.fter Mr.Hzek, 



1S91. Tab. V. fig. 3. 

 Pig. 169. Cysticercoid with anterior portion of fail. Zeiss S, D. 



After Mrazek. 1S91. Tab. V. fig. 4. 

 Fig. 170. Two hooks of same. Zeiss S. F. After Mrazek. 1S91. 



Tab. V. fig. 5. 

 Fig. 171. The same, greatly magnified. After Mrazek. 1S91, 



Tab. V. fig. 6. 

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



(?■>. The oncospheric hooks are preserved, .\fter 



Mrazek, 1S91, Tab. VI. fig. 24. 



