604 



14 DRETANIDOTAENIA SINUOSA (Zeder. 18tK)) Rallllet, 1893. 



(1782, Taenia coUari nigro Bloch— vide Hud., ISIU; I/SJ, T. intun- 

 dibuliformis (Anserum) Goeze — vide Dies., 1850; 1786, T. col- 

 laris Batsch— vide Rud., 1810; 1790, T. torquata Gmelin— vide 

 Rud., 1810; 1800, Alyselminthus sinuosus Zeder; 1800, Taenia 

 breviarticulata Goeze; 1803, Halysis sinuosa (Zeder, 1800) 

 Zeder; 1803, H. torquata (Gmelin, 1790) Zeder— vide Rud., 1810; 

 1858, Hymenol^^pis (Lepidotrias )sinuosa (Zeder, 1800) Wein- 

 land). 



[PI. X, figs. 116-124; PI. XI, figs. 125-139; PI. XII, figs. 140-146; 

 PI. XIII, fig. 153.1 



Diagnosis: 50mm to 160mm long by 1mm to 2mm broad. Head 

 almost globular, rostellum armed with a simple row of 10 

 hooks 51 1^ to 61 y" long. Neck very long. Anterior segments 

 of variable breadth and length; the following segments trape- 

 zoidal; posterior segments rounded. Genital unilateral, sit- 

 uate toward the anterior third of the lateral margin; in each 

 pore is found a globular sac, armed with spines, and appear- 

 ing as a black point; tliis punctate line allows an immediate 

 determination of the species. Eggs with 3 envelopes, the ex- 

 terior 42 fi to 44 II hooks of oncosphere 7/u to 8 /u. 



Development: Cercocystis Dr. sinuosae found in Gammarus 

 pulex by Hamann and von Linstow; in Cyclops viridis Fisch. 

 C. agilis Koch and C. lucidulus Koch, by Mrazek. 



Host: Tame dncks (Anas boschas dom.); mallard duck (A. 

 boschas); Brazilian teal (A. braziliensis); tame goose (Anser 

 anser dom.); graylag goose (A. anser); pintail (Dafila acuta); 

 tufted duck (Aythya fuligula). 



Geographical distribution: P^rance. Germany, Italy, Sweden 

 and Bohemia. 



The species sinuosa as at present adopted by authors 

 stands on a most peculiar footino^. 



Gooze left a description and figures of this worm, with the 

 MS. name Taenia breviarticulata, from Anas fusca, which were 

 later published by Zeder (ISOO, pp. 295-298) under Alyselmin- 

 thus sinuosus. .According to Krabbe (1869, p. 298) Rudolphi de- 

 termined as sinuosa formis which differ greatlj'^ from one 

 another. Dujardin (1845) p. 573) then gave a more exact de- 

 scription of a form which he determined as T. sinuosa (Zeder) 

 Rud., taken from Anas acuta, adopting Rudolphi's synonymy 

 in all tssentials. Krabbe (1S69, i)p. 298-299) adopted Dujardin's 



