850 ox A XKW ASKXUAli TArKWORM. 



Female oiii"!ms oowsist of a layer of gonadial tissue lying in the 

 iwodvilla at its jum-tiou with the oortioal layer tVom whiel> ova are 

 shed into the body, whieh they peiuieate e\ eu to the outer layers of 

 the iH^vtex. Tlieiv is notraoeof sejjnientally armni^ed ixouads or of 

 a viterus. nor are the eggs sun•ounde^l by any kind of " eapsuU\" 

 There is no vagina or female pass;\ge of any kind ; the vitelline 

 glands are totally a\>sent. The ripe eggs are surixninded by a 

 thiek hyaline shell and uoixe weit> observed to be dividing and 

 no en\bry(.>s wei-e diseovereii in them. Tlnis it is possible that 

 fertilisjitioi\ txvni's outside of the body. 



These ehaa-aoteristies do not entirely fall in with those of any 

 othei- fannly of tape\vorins. They obviously point to an altinity 

 with the Aeoleiike, but do not definitely necessitate the inelusion 

 of this remarkable worm within that family. 



$ Anatomical Summanf, 



It may be eon\eiiient t<^ exta'act from the foregoing aeeouut 

 of this new tapeworm the more i^emax'kable anatomical facts 

 which 1 have been able to make out. 



(1) The alxseuce of a marked scolexin the Ci/stice-trnsoi a tape- 



worm which cannot be placed among the Hotluiecephalids 

 and of which thei-efore it would be exj>ecred that the scolex 

 would be very pivminent. And con-elated with this the 

 necessixry assumption that, as in Bothriocephalids, the 

 scolex only develops jixH'i^xi^stt with the givwth in maturity 

 of the worm. 



(2) The enormous size of the sti'obila as compared with the 



bladder — a iiuv condition among the Tetnicotylea, but 

 jxxmlleled in Ci/sticercus fuiU'lolarit^. 



(3) The very thick layer of muscle surrounding the dorsad 



vessel of the excretory system and the bifurcation of the 

 titxnsvei'se vessels round the doi-sjil vessel to open into the 

 veiitii\l water vascidai- tube. 



(4) The total aWeuce of genenitive duct*> or (prt>*umiug that 



the sjHvies is diavious) of the female tubes, which is, so 

 far as I am aware, a unique anatou\ical chai-acter. 



l^o) The total alienee of a uterus oi- of any tn\ce thereof. 



(0) The ditJuse and non-metameric chanict-er of the ovaries, 

 which ai'e not sliarply ditl'erentiated into i-elatiNcly small 

 Ixidies of a deliiiite shaj>e. 



{7) The enormous quantity of eggs pix>duced and their exist- 

 ence in quite anterior as well as postei'ior segments ; the 

 eggs ai-e, moi-eover, fovuid quite as abundantly in the 

 cortical layer as in the medulla. The conditions observable 

 in this part of the generative system ai-e simply an 

 exaggeratioT\ of what is to be met with in other genera, 

 where the eggs cinue to be iiltimately scattereil tlnvugh 

 the medullary parenchyma. 



