DESCRIPTION OF PLATES. XXIU 



4. A few articulations or sexually immature proglottides from tlio lower part of 



the body. Natural size. 

 6. One of the club-shaped proboscides isolated (x 20 diam.). 



6. Diagram of one of the smaller hook-circles (x 60 diam.). 



7. One of the Isacge hooks (x 260 diam.). 



8. One of the small hooks (x 260 diam.). 



9. Head oi TetrarTiynchm reptans viewed from above (x 8 diam.). 



These figures are original.- — T. S. C. 



PLATE XI. 



1. A mature specimen of Fasciola Jiepatica seen from the ventral aspect (x 6 



diam.). After Blanchard. 



2. Diagram representing the digestive system (x 2 diam.). Original. 



3. Diagram of the water-vasculaj system (x 2 diam.). Original. 



4. Outline of the BO-caUed cerebral ganglia, commissural band, lateral ganglia, 



and branching filaments. Altered from Blanchard . 



5. Diagramatic representation of a few of the cutaneous spines (highly magnified). 



Original. 



6. Upper part of the male reproductive apparatus. Altered from Kiichenmeister. 



7. Egg of Fagciola hepaiica, showing the so-called mulberry stage of yelk- 



segmentation. Original. 



PLATE XII. 



1. Head, neck, and upper joints of Tcenia solium. Reduced from Blanchard. 



2. One of the lower or sexually-mature joints of the same, showing the water- 



vascular canals and the branched uterine organ distended with ova. After 

 Blanchard. 



3. Two eggs ; one of them containing a six-hooked embryo. Original. 



4. An egg invested by its primitive yelk-sac, the superfluous granular yelk-mass 



is also shown. Original. 

 5 — 10. Six dissections, showing the so-called Oysticercus cellulosa in various stages 

 of development. Reduced from Leuckart. 



11. A folly-developed Gysticereus cellulosw, taken from fresh pork. (Natural size.) 



From a fig^e by the late Professor Smith, of Cork. 



12. Cysticercus from salted pork. After Smith. 



13. The same (as Fig. 11), x 6 diam. Smith. 



14. Head and body withdrawn from the caudal vesicle. Smith, 



15. One of the cephalic hooks (x 400 diam.). Smith. 



16. A group of the so-called calcareous particles (= " assimilating cellules," Smith) 



from a Cysticercus taken from salted pork (x 620 diam.). Smith. 



PLATE XIII. 



1, Juvenile hydatid, about six weeks old (x 50 diam.). From a specimen reared 

 by Leuckart, and now in the Author's collection. Original. 



