100 



Fig. II. Ceplialopedal mass, dissected to show relation 

 of bucca] mass to bases of the arms fiom 

 ventral surface, x |. 



Fig. 15. Transverse section of mantle in region of 

 cartilaginous stylet. Highly magnified. 



Fig. 16. Right stylet (a) dorsal view; (b) from right 

 side. x |. 



Plate IV. 



Fig. 17. Alimentary canal, dissected out from body, to 

 show relations of various parts; crop turned to 

 the right, buccal mass to the left, and liver 

 forwards. x |. 



Fig. 18. Oesophagus with crop, and stomach; slit open 

 to show ridged chitinous lining of all three 

 regions. Muscular walls of stomach turned 

 back from the chitinous lining. x 1. 



Fig. 19. T. S. stomach, showing thickened grinding 

 pads, and corresponding thickened cuticle. 



Fig. 2U. Buccal mass, from right side. x 1. 



Fig. 21. Right posterior salivary gland ; inner surface. 



Fig. 22. Right anterior salivary gland ; inner surface. 



Fig. 23. Ventral surface of buccal mass, showing sub- 

 lingual salivary gland. x 1. 



Fig. 24. Sagittal section through buccal mass, and 

 anterior portion of oesophagus. x 1. 



Fig. 25. Two rows of teeth from radula; much enlarged. 



Fig. 26. Sagittal section of ink sac. x 2. 



Fig. 27. Jaws, from left side, x 1. 



Fig. 28. Spiral caecum; ventral view, showing entrance 

 of hepato-pancreatic duct. x 1. 



Fig. 29. Anal ear (enlarged). 



Fig. 30. Inner wall of terminal part rectum, showing 

 aperture of ink duct on dorsal papilla. x 2. 



