104 TRANSACTIONS LIYEEPOOL BIOLOGICAL SOCIETY. 



received. They were adherent by their suckers and hooks 

 to the jjiece of liver, and two of them liad excavated 

 cavities in the tissue. I tried to kill one in fresh water, 

 then in sea water containing cocaine, but without success. 

 One specimen was preserved in Zenker's tluid and serial 

 sections were made and stained witli Mann's methyl- 

 blue eosm. The rest were preserved in weak formalin. 

 Fixation and staining were quite satisfactory. 



The appearance of the Cestode when alive is repre- 

 sented in fig. 2, PI. I, about natural size. It varied 

 from 30 to 60 mm. in length, according to the des-ree 

 of contraction, for it was very mobile. When fully 

 extended it was Cjuite smooth, without wrinkles or 

 furrows, a slight constriction marked oft^ the anterior 

 " cephalic " part froni the body, which tapered to a 

 blunt-pointed " tail " extremity. Wben contracted after 

 killing, the whole body was irregularly segmented by 

 rather deep constrictions, and a short terminal portion — 

 the "appendix" of Lonnberg — was retracted into a socket 

 or sheath. In this condition the worm is figured by 

 the latter author, who also gives an account of its 

 moipliology. I am, however, able to add some details of 

 structure, and these may be worth recoiding since 

 Lonnberg' s paper is not easily accessible. At any rate, 

 the Cestode is so rare that confirmation of the already 

 pul)lislit(l account may be desiraiile. 



Tlie Scole,r. In life the scolex is quite smooth, btit 

 after fixation it is marked by a gT'eat number of 

 longitudinal, shallow furi'ows (Text-fig. 1). 'I'here are 

 two bothiidia, " dorsal " and " ventral " in jjosiiion, 

 and cacli of these stiuctures is an (dongaied suctorial 

 organ like the suckci of ;i /}(jf/i riocr/jfuil ii.s. Its wall 

 consists of de-nsc p;ircijcliymal tissue, with rel;itiv(d\- few 

 muscle fibres. A sliglit ridge runs longitudinally alnng 



