PLATE I. AND II., 



Illustrating W. H. Fublonge's Paper " On the Internal Structure 



OF PULEX IrRITANS." 



Plate I. 

 Fig. 1. — Heticulated structure of first stomach. 

 Fig. 2. — The gizzard. 

 Fig. 3. — The rectal papillse. 

 Fig. 4. — Tracheal enlargement in upper tarsal joints of the third pair 



of legs. 

 Fig. 5. — Female organs of reproduction — end view. 

 Fig. 6. — Male ditto — A., end view ; B., lateral view. 

 Fig. 7. — Prehensile organs and sheath plate. 

 Fig. 8. — Lateral view of male reproductive organs, showing extrusion of 



penis sheath and penis. 

 Fig. 9. — Extremity of penis sheath — open. 

 Fig. 10. — „ „ — closed. 



Plate II. 

 Abdominal tracheal system of the Pulex irritans. 



