EXPLANATION OF PLATE X. 



Fig. I. — Atopos (Podangia) kempii (nat. size). 



,^ 2. — Head of the animal, dorsal view, X 2. 



,, 3. — Head of the animal, ventral view, X about 4. 



,, 4. — Pallial complex, X 2; the right half of the figuie is 

 shown to be reflected outwards with the mantle wall 

 I, rectum; 2, pulmonary aperture; 3, kidney; 4, 

 ventricle. 



,, 5. — Transverse section of a portion of body-wall, X 230. 

 ,, 6. — Transverse section of the blood sinus under the keel, 



X 51. 

 ,, 7. — Transverse section of a portion of foot, X 103. 

 ,, 8. — Transverse section of the body through the middle, X 2. 



„ 9. — Proboscis, proboscis sheath and radular sac with salivary 

 glands and their ducts, X about 10. 



,, 10. — Diagrammatic longitudinal section of the proboscis and 

 its sheath, X about 10. 



J, II. — Longitudinal section of the protruded proboscis, X 2. 



., 12. — Liver and salivary glands, dorsal view, X 2. 



13. — Liver, ventral view (of the smaller specimen), X 2: a,h 

 and c are transverse sections at different parts of the 

 organ, shown by lines in the same. 



