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EXPLANATION OF PLATE LXX. 



SlMIUJNCINCS DACELONIS, JllStn. 



1. Scolex, rostellum retracted. 



2. ., ,, everted. 



.*». Portion of strobila, showing nerves and excretory canals. 



4. Edge of segment, showing cirrus everted. 



5. Hook, very highly magnified. 



(i. Internal anatomy seen in Longit. Horiz. Section. 



7. ,, ,, ,, ,, transv. section. 



8. Oncosphere. 



Explanation of lettering :- -C. corp., calcareous corpuscle; cirr. sac, 

 cirrus sac ; cu., cuticle ; d.v , dorsal excretory vessel ; l.m., longit. muscle 

 bundle; n. , longit. nerve ; ov., ovary; r. sem., recept. seminis ; tr cxc. 

 v., transverse excretory vessel; t , testis ; tr. m., transverse muscle; ut., 

 uterus; vag., vagina: v. d<-f . vas deferens; v. ell., vas ell'eiens ; vit. 

 gld., vitelline gland : v. sem., vesicula seminalis ; v. vess., ventral vessel. 



