042 



V\g. 28a-o. Onons|>hfi-ir hodUs. Al'l.i .Miaz<'k, \XW. Tali. \'. lig. 

 14a-c. 



IFifTP. .'!'-:!n. Dicraimta'. nia aeriuabilis. 1 



Fig. 29. Five hooks from the rostellum. x240. Afttr Krabhe. 

 1869, Tab. VIII. fig. 212, fiom RiKloiphi's oiiigrinal ma- 

 terial in the Berlin Museum. 



Fijr. .-^.n. Isolated hn.ik from- the roptpllum. x920. After Krabbe. 

 1869, Tab. \'1I1. Hk- -'-. finm sixM-inT-ii in <'re))lin's 

 eollection. 



[Figs. .31-34. Dicranntacnia furcigeirt.| 



Fig. .'U. Lsolated hook from the rostellum. x20. After Duj.ir- 

 din, 1845, PI. IX. Fig. A. Host: Wild duck. 



Fig. 32. Isolated hook from the rostellum. x920. After Krabbc 

 1869, Tab. VIII, fig. 206, from Nitzsch's original ma- 

 terial. (See Rudolphi, 1819, p. 528.) Host: Mallard. 



Fig. 3.3. Ovum with oncosphere. x240. After Krabbe, 1869. Tab. 

 YIII, fig. 207, from Nitzsch's original material. 



Fig. 34. Ten hooks on rostellum. x240. After Krabbe, 1869. 

 Tab. VIII, fig. 206, from material collected in Iceland 

 in 1863. Host: Mallard. 



Fig. 35-36. Taenia conica=? Dicranotaenia furcigera. ] 



Fig. 35. Natural size: a, head; b, rostellum; c, body. After 



Molin, Tab. VII, fig. 1. 

 Fig. 36. Enlarged. After Molin, 1861, Tab. VII, fig. 2. 



Plate IV, Figs. 37-53. — Dicranotaenia sphenoides and Drepani- 

 dotaenia lanceolata. 



Figs. 37-42. Dicranotaenia sphenoides. 



Fig. 37. Strobila, natural size. After von Linstow, 1872, Taf. 



III. fig. 9a, of Taenia cuneata. 

 Fig. 38. Scolex and anterior segments, enlarged. After von 



Linstow. 1872, Taf. Ill, fig. 9, of T. cuneata. 

 Fig. 39. Isolated hook from the rostellum. After von Linstow. 



1872, Taf. Ill, fig. 10, T. cuneata. 

 Fig. 40. Cysticercoiif from an earthworm. Koritska, or. 3. obj. 



4. After Grassi & Rovelli, 1892. Tav. IV, fig. 12. 

 Fig. 41. TransAeise section of the same: cav., "cavity of the 



gastrula;" cis., cyst; par. est., external wall: par. int.. 



internal wall; ros.. restellum; ven., sucker. Koritska. 



oc. 3. obj. 7. After Orassi Rovelli, 1X92. Tav. IV, fig. 



11. 



