694 DR. F. E. BEDDARD ON 



These characteristics are collectively different from anything 

 met with among the Tetracotylea that is known to me. They 

 are not, however, inconsistent with the conditions known to occur 

 among the Tetraphyllidea, if we may admit the grooves upon the 

 scolex to I'cpresent the bothria of such tapeworms. The suckers 

 would then correspond with the small accessory suckers so 

 frequently possessed by these latter worms, and their small size 

 relatively to the scolex would be thus intelligible. The apparently 

 numerous bothria not reducible (by me) to symmetiy is suggestive 

 of a type like Phyllohothrmm * slightly modified, or perhajDS 

 Peltidocotyle t. We cannot, however, place Dasyurotcenia among 

 these Tetraphyllidea on account of the Tetracotylean character of 

 its yolk-gland. But with reference to this gland it may be borne 

 in mind that it is in structure much more diffuse than is visual 

 with the generally solid vitelline gland of the Tetracotylea, 



The genus may be thus defined : — 



DasyurotaBuia, gen. nov. 



Stoutly huilt worms with large scolex bearing four small suckers, 

 of which the inner two hear hooks. No rostellum, hut anterior end 

 of scolex, including hooked suckers, retractile. Segments very 

 short. Inner layer of (longittidinal) mtiscles very thick, consistivg 

 of fo%ir to six roivs of hundles of fibres. Ventral excretory tabes 

 large, with numerous valves not communicating with each other in 

 the strohila. Dorsal vessels minute, not always visible. Genital 

 pores uidlateral. Testes numerous, chiefly lateral, anterior, and 

 dorsal. Vas deferens tvith a large coil in middle of segment sur- 

 rounded' by prostatic cells ; cirrus sac large, cirrus with spinelets. 

 Ovaries loith two icings, mediant and posterior and ventral in 

 position, in front of vitelline gland, which is also symmetrical. 

 Shell-gland median, dorsal. Beceptacicluin sem,inis present, nearly 

 median, ventral. Uterus sac-like, persistent, fills nearly whole of 

 ripe 2)7-oglottid. Eggs ihm-shelled. 



Hab, Marsupials. 



The species I term " rohwsta " on account of its very stout build. 

 It is, however, quite impossible for me to venture upon an 

 enumeration of the peculiar specific charactei'istics for the present. 



This genus and species cannot, as I think, be identified with 

 any other form that has been desci-ibed from an Australian 

 Marsupial, From the present genus we only know a species 

 described by myself § a little time since as Anoplot(Bnia dasyuri. 

 Nor can I identify it with any of the genei'a enumerated at the 

 beginning of this paper in other Marsupials. In fact, Bertiella is 



* Bfonu's ' Tbierreicli,' Bd. iv. Cestoiden, pi. xli. fig. 10. 



f Ihid. pi. xliii. fig. 1. 



X Middle line of female app.iratus only slightlj' displaced towards pore side. 



§ P. Z. S. 1911, p. 1003. 



