922 MR, G. M. VEVJ3RS ON CESTODA PROM MAMMALS 



Hymenolepidid^ R. & H., 1909. 

 DiPYLiDiiN^ Stiles, 1896. 



Cyclorchida Fuhrmann, 1907. 

 G. crassivesicula, sp, n. 



T ^ N 1 1 D ^ Ludwig, 1 886. 

 T^NiiNJS Stiles, 1896. 



EcHiNOCOGCUs Rudolphi, 1801. 



E. granidosus (Batsch, 1786), Rud., 1805. 



T^NiA Linnaeus, 1758. 



T. icenimformis (Batsch, 1786), Wolfhugel, 1911. 

 T. hcdaniceps Hall, 1910. 



Qyclophyllw^a (Larval forms). 



T^NiiD^ Ludwig, 1886. 



MuLTicEPS Goeze, 1782. 



M. (Cosnurus) serialis (Gervais, 1847), Stiles & Stev., 

 1905. 



T.ENIA Linnaeus, 1788. 



T. hydatigena Pallas, 1766. 



(Syn. Gysticercus tenuicollis Rud., 1810.) 



Cyci. ophyllid ea . 

 Mesocestoidid^ Fuhrmann, 1907. 



Mesocestoides lineatus (Goeze, 1782), Railliet, 1893. 



The occurrence of this species in a Fox and two Badgers, all 

 from Britain, is interesting, as it opens up the question of the 

 occurrence of two species, M. lineatus and M. litteratus, in this 

 country, and also throws some light on the question of the 

 validity of the latter species. 



Hall stated in 1919 (2) that he could not express an opinion 

 on the validity of M. litteratus, but that he retained the name 

 although he could not see any evidence from material or desci-ip- 

 tions for supposing that it was a separate species. In the 

 examination of the material from the three hosts mentioned 

 above, certain vai-iations in the size and shape of the head, neck, 

 segments, and internal anatomy were noticed, all of which might 

 be accounted for by differences in the mode of preservation. In 

 the case of the material from one Badger, the host had been dead 

 some time, and the worms were also dead and well extended in 

 consequence ; in the case of the other Badger the worms were 

 collected and killed at once, in consequence of which each strobila 

 was much contracted, causing distortion of the internal organs of 

 each segment. 



