NEW MAMMALIAN TAPEWORMS. 1003 



Accepting the above as the generic characters of the genus 

 IViysanotcenia, the two species may be tlius defined :— 



(1) Thysanotsenia gaml)iana F. E, B. 



Thysanosoma gambianum Beddard, P. Z. S. 1911, p. 651. 



Length about six inches, greatest diameter 6 millimetres. Segments 

 never lovger than broad and only a few at the posterior end as lon;j, 

 as broad. Genital papilla not very conspicuous. Tivo excretory tubes 

 on each side, the inner of the tiuo the larger, placed laterally 

 to each other ; a netivorlc of fine tubules connected with these. Testes 

 in two groups, the larger lying on the side furthest from the 

 genital pore, occupying the space between the two excretory tubes of 

 that side and a little beyond on each side. Ovary and yolk-gland on 

 2~)ore side lying betiveen the two excretory tubes and a little to the 

 inner side also. Sperm-duct narrow or coiled, with a small vesicula 

 seminalis. No receptacidum seminis ; vagina opens into a terminal 

 muscular sac. Paruterine organs each with many embryos. Uterus 

 a transverse sac. 



Host, Gambian Pouched Rat (Cricetomys gambianus). 



(2) Thysanotsenia lemuris, sp. n. 



Length four to six inches ivith diameter of three millimetres. Scq- 

 nients at end of body rather longer than broad. Genital p>apilla venj 

 conspiciLOUs. One excretory tube on each side of body corresponding 

 to the innermost of the t:vo present in Tli. ganibiana. No networlc of 

 tubules connected witli this. Testes scattered through posterior part of 

 the body and anteriorly to the sides of ovary. Ouarij andyollc-gland 

 submedian in j^osition, slightly to [lore side of segment. Sperm-duct 

 wide and coiled after issuing from cirrus sac. lleceptaculam seminis 

 present. Paruterine organs with only three or four embryos in each. 

 A uterus not formed (?). 



Host, Black Lemur (Lemur macaco). 



It is obvious from the above definition and from what has been 

 said in the course of this paper that the two species, which I assign 

 to this new genus Thysanotcvnia, difier from each other in a 

 good many points, and perhaj)s may be considered to meiit generic 

 separation. 



Anoplotsenia dasyuri, gen. et sp. n. 



At about the same time, i.e. from February 9th-l 1th, 1911, three 

 examples of the Tasmanian Devil [Dasyurios ursinus) died in the 

 Gardens ; only one of them was found to contain tapeworms, and 

 these occurred in that example in very great numbers. The 

 specimens belong, as I believe, to a new species, and I am also 

 disposed to form for it a new genus, which is to some extent allied 

 to the Anoplocephalidte, but also, in the form of the uterus, 

 suggests Tteuia, sensu stricto. These facts have suggested the 



