194 



MARINE AND FISHERIES 



EXPLANATION OF FIGURES. 



5 GEORGE v., A. 1915 



All drawings, unless otherwise mentioned, were drawn to the scale indicated 

 with the aid of an Abbe camera lucida. 



Figs. 1, a, b. — Plerocercoids from kidney of host, X 33. 



Fig. 1 c. — Small plerocercoid from liver of host, X 33. 



Figs. 2, 3, 4, 5. — Plerocercoids from liver and intestine of host, X 33. 



Fig. 6. — Plerocercoid from gonad of host, X 33. 



PLATE XX. 



Fig. 7. — Transverse section through a 2 • 9 mm. plerocercoid, 30u from the apex, X 105. 



Fig. 8. — Transverse section of same, ISOfi from apex, showing end-organ and suckers, 

 X 130. 



Fig. 9. — Longitudinal section through end-organ of another specimen, showing structure 

 X 130. 



Fig. 10. — Transverse section through the 2 9 mm, plerocercoid 240^ from apex, showing 

 "Muskelsterne", X 130. 



Fig. 11. — Egg, showing structure and various forms of the outer membrane, a X 700; 

 others X 350. 



PLATE XXI. 



Fig. 12. — Transverse section through body of plerocercoid, showing general structure; 

 semi-diagrammatic, X 130. 



Fig. 13. — Part of a transverse section through the body of a plerocercoid, showing details 

 of cuticular structures, X 600. 



Fig. 14. — A group of flame-cells in connection with one of the excretory vessels of the median 

 frontal pair, X 1,000. 



Fig. 15. — A flame-cell greatly magnified, showing structure, X 2,000. 



Fig. 16, 17. — Longitudinal sections of different conditions of the end-organ in adult speci- 

 mens of P. amblopUtis, X 330. 



