DESCRIPTION OF PLATE XIII. (VOL. II.) 

 ENTOZOA. 



LIST OF ABBREVIATIONS. 



Fie. I. 



Fig. 6. 



Fig. 7- 



Fig. 8. 



Fig. 9. 



Fig. 10. 



A view of Drepanidotaenia hemignathi, x 15. The dark patches in the anterior two-thirds of 



the body are caused by the generative organs ; in the posterior third they represent the eggs 



in the uterus. 

 An isolated hook from the rostellum, x 500. 

 A longitudinal section through the head, x 100. The rostellum, r., is retracted. The point 



of fusion of the two lateral nerves is shewn at n. s. The section passes between the 



suckers. 

 A transverse section through a mature proglottis, x 70. 

 A longitudinal section, somewhat oblique, showing the regular arrangement of the longitudinal 



muscles, x 50. 

 A longitudinal section through several mature proglottides, x 50. This shows the transverse 



connection between the two ventral longitudinal excretory canals and the transverse lines 



formed by the concentration of the parenchyma at the posterior end of each proglottis. 

 A view of the head in an expanded, flattened-out state, x 60. 

 A view of another head in a contracted, bunched-up condition, x 40. 

 A transverse section through the head, showing the ten hooks on the rostellum and the 



four suckers. 

 A portion of a proglottis, highly magnified to show the minute anatomy, x 450. 



