DESCRIPTION OF PLATE XIII. (VOL. II.) 

 ENTOZOA. 



LIST OF ABBREVIATIONS. 



Central nerve ganglion. 



The amoeboid nuclei of the skin and the 



lemnisci. 

 Ovary. 



Nucleus of parenchymatous cell. 

 Parenchyma cell. 

 Knob-like ends of ectoderm cells under 



cuticle. 

 Receptaculum seminis. 

 Rostellum. 

 Coagulated masses of spermatozoa in the 



body-cavity of the female. 

 Testis. 

 Uterus. 



Ventral excretory canal. 

 Vesicula seminalis. 



Fig. I. 



Fig. 2. 

 Fig- 3- 



Fig. 4- 

 Fig. 5- 



Fig. 6. 



Fig. 7- 



Fig. 8. 



Fig. 9- 



Fig. lo. 



A view of Drepanidoiaenia /temignat/ii, 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, >:, is retracted. The point 



of fusion of the two lateral nerves is shewn at ;/. 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 5o. 

 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. 

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



