Plate IX. 



OCTOCOTYLE MAJOR. 



Fig. 1. The whole worm viewed from the ventral side. From a specimen killed 



under the pressure of u cover-slip, and therefore much broader than it 



really is. 

 „ 2. Hooks at the posterior end of the body, with muscular fibres attached, 



X 204 diam. 

 ,, 3. Chitinous framework of the posterior sucker viewed from one side, x 305 



diam. The piece b is paired. 

 ,, i. One of the posterior suckers viewed entire in profile, x 305 diam. 

 ,, 5. Penis viewed in its natural position from the ventral side. x 305 diam. 



For clearness' sake the spines are drawn fewer than they really are. 

 „ 0. Ovarian ova near the oviduct end. x 305 diam. 



C T O C O 1 Y L K M 1 N K . 



Fig. 7. The whole worm viewed from the ventral aide. From a specimen killed 



free with hot sublimate. The nervous system is shaded with parallel 



lines. 

 „ 8. Anterior end of the body. x 305 diam. To show the attachment of 



muscular fibres to the anterior suckers. 

 „ 0. Hooks at the posterior end of the body, a, outer pair ; x 305 diam. b, 



inner pair ; x 427 diam. 

 „ 10. Chitinous framework of the posterior sucker viewed from one side, x 305 



diam. The piece h is paired. 

 ,, 11. Female genital ducts viewed from the ventral side. Free-hand. 

 ,, 12. Median sagittal section through the region of the genital atrium. x 305 



diam. 

 „ 13. Penis viewed in its natural position from the ventral side. x 305 diam. 



The spines are represented one less than they really are. 



