NEW MAMMALIAN TAPEWORMS. 



995 



two perfect examples, and a number of large fragments, of a 

 tapeworm which I refer to the above new genus and species. 

 There is, as it appears to me, no doubt whatever that these 

 tapeworms belong to the same genus as a species which I have 

 recently described in the "Proceedings"* of this Society as Thy- 

 sanosoma gcmibianum from the Gambian Pouched Rat {^Cricetomys 

 gambianus). The external characters are in veiy near agreement. 

 The present species agrees with Thysanosoma gambiammi in the 

 unarmed head, in the fact that the segments increase in length 

 posteriorly but are never longer than broad, that the genital 

 apertures are unilateral, and that the eggs are enclosed in a 

 numerous series of paruterine organs in the fully mature 

 segments. This set of characters is sufficient to refer the present 

 species, as well as Thysanosoma gambianum, to the subfamily 

 Thysanosominte of the Anoplocephalidfe. 



Text-fig. 204. 



Thysanotania lemuris, about twice natural size. 



Of the two specimens which possessed a scolex, the larger 

 (text-fig. 205) measured at least four inches in length, and was 

 23robably longer as it ended abruptly and without a definite terminal 



* Above, p. 651. 



