(548 



Fig. J 24. Two i.solatud hooks. x;)20. a, from a parasite in the 

 domesticated duck; b, from a parasite in the mal- 

 lard. After Krabbe, 1869, Tab. VII, fig. 152a-b. 



Plate XI, F;g.s. 125-139.— Drepanidotaenia sinuosa. 



Fig. 125. Segment with genital organs and extruded cirrus. 



xib. After Krabbe, 1869, Tab. VII, fig. 153. 

 Fig. 126. Bloch's original figure of "Taenia collar! nigro," from 



the domesticated duck; possibly identical with Drep. 



sinuosa. After Bloch, 1782, Taf. IV, fig. 11. 

 Fig. 127. Anterior portion of the same, enlarged. After Bloch, 



1782, Taf. IV, fig. 12. 

 Fig. 128. Segments from the middle of the same, enlarged. 



After Bloch, 1782, Taf. IV, fig. 13. 

 Fig. 129. Cirrus. x210. After Dujardin, 1845, PI. 9, Fig. D. 



Host: Goose. 

 Fig. 130. A Cyclops viridis containing 3 cysticercoids of Drep. 



sinuosa: vc, eggs. Zeiss 3, A. After Mrazek, 1891. 



Tab. V, fig. 7. 

 Fig. 131. Isolated cysticercoid, to show the pioportional sizes 



of the cyst and the tail. Zeiss 3, A. After Mrazek, 



1891, Tab. V, fig. 8. 

 Fig. 132. Isolated hook, greatly enlarged. Zeiss 3, F. After 



Mrazek, 1891, Tab. V. fig. 10. 

 Fig. 133a-c. Young- stages of hooks. Zeiss 3, F. After Mrazek, 



1891, Tab. V, fig. 11. 

 Fig. 134. Two isolated hooks of a cysticercoid which otherwise 



corresponds in fonm to Drep. sinuosa. The form and 



size (35 u) of these hooks resemble those of Drep. 



setigera. Zeiss 3, F. After Mrazek, 1891, Tab. V, fig. 



12. 

 Fig. 135. Cysticercoid with anterior portion of tail, drawn from 



life. Zeiss 3, D. After Mrazek, 1891, Tab. V, fig. 9. 

 Fig. 136. Two isolated hooks from fully developed scolex of 



cysticercoid. Zeiss 3, F. After Hamann, 1889, Taf. 



I, fig. 9. 

 Fig. 137. The 10 hooks of the rostellum in position. Zeiss 3, F. 



After Hamami, 1889, Taf. I, fig. 10. 

 Fig. 138. Calcareous corpuscles from the parenchyma of the 



scolex. Zeiss 3, F. After Hamann, 1889, Taf. I, 



fig. 11. 

 Fig. 1.39. A hook of the oncosphere from the tail of a cysticer- 

 coid. After Hamann, 1889, Taf. I, fig. 12. 



