NEW MAMMALIAN TAPEWORMS. 1013 



and the testes become much restricted and tend to disappear. 

 The most noticeable part of the medullary tissue left is a pro- 

 jection from the region of the cirrus sac lodging the coil of the 

 vas deferens. 



It would appear therefore that the uterus in this genus 

 Anoplotcenia rather combines the characters of that organ in 

 several other genera than presents us with a new type. That it 

 passes throvigh a simple saccular stage is not perhaps a fact of 

 any great moment ; for that occurs in many genera. But it is 

 undoubtedly reticular at one time, and, contrary to what is found 

 in such cases, the reticular stage is not permanent. 



^ _. ...^^ 



Anoplotcenia dasyuri, longitudinal section throiigli pi'oglottid, showing the branched 

 and reticular uterus with ova in smaller and larger clumps. R.8., receptaculum 

 seminis ; W., excretory tube. 



The vdtimate condition of the uterus does not fall definitely 

 within any of the types used by Ransom in his table of arrange- 

 ment of the genera of Ttenioid Cestodes ; and the condition of this 

 organ in Anoplotcenia dasyuri is really one of the chief reasons 

 upon which I base its generic distinction from other forms. 



The testes of this species are very numerous in those anterior 

 segments in which they are at their full development. They 

 are pressed closely together and overlap and appear to fill all of 

 the available space left between the ovaries and other organs of the 

 proglottid. As the latter are posterior in the segment, the testes 

 are mainly anterior. Both in longitudinal and sagittal segments 

 the testes can be seen to be limited in their occui-ience only by 



Pkoc. Zool. See— 1911, No. LXIX. 69 



