269 



ON DREPANIDOTAENIA UNDULATA (KRABBE). 



By T. B. Rosseter, F.R.M.S. 



(Bead January Idth, 1906.) 



Plate 19. 



Taenia serpentiformis, noncollaris (Goeze, 1782). 



Taenia undulata (Rudolphi, 1819). 



Taenia undulata {Taenia angidata) (Duj., 1845). 



Taenia undulata (v. Siebold, Friss. Creplin. Kuchenmeister, 1867). 



Taenia undulata (Krabbe, 1869). 



Taenia angidata = undulata (Professor J. Leidy, 1887). 



Drepanidotaenia undulata (Rosseter, 1905). 



This avian tapeworm has been taken by the above helniin- 

 thologists at various times from the intestine of the following 

 birds — rook, ^ay, fieldfare, blackbird, starling, redwing, and 

 ring-ousel. My specimen was taken from Turdus musicus. 



Following Raphael Blanchard (Hist. Zoo. et Med. des Teniades 

 au genre Hymenolepis, Weinland, pp. 68, 69), I have not placed 

 T. undulata in the genus Hymenolepis, which genus, so far as 

 it applies to avian tapeworms, I hope to consider in a future 

 communication. 



The following is Krabbe's description of this worm : " Longit., 

 280mm.; latit., 4 — 5 mm.; uncinulorum, 46 — 64 mm.; corona 

 duplex, quorum anteriores longit. 0073 mm., posteriores 0'063— 

 092 mm., aperturae genitalium secundae ; longit. penis 021, 

 latit. 0-016 mm.; hamuli embryonales, longit. 0-013 — 0-017 mm." 

 (Krabbe's Bidrag til Kundskab, p. 83, no. 101, tab. 10, figs. 261 — 

 263). 



Krabbe, in his Bidrag til Kundskab (p. 76, no. 90, tab. 9, figs. 238 — 

 240; p. 83, no. 101, tab. 10, figs. 261—263), rejects Dujardin's 



