302 



ZOOLOGY 



body the muscle fibre is unstriated, except in the case of the 

 muscles attached to the jaws, where the fibres are distinctly 

 striated. 



The buccal cavity, which contains the two jaws, opens 

 behind into a muscular pharynx, but it is continued ventrally 

 somewhat behind this opening, and the recess so formed receives 

 the united duct of the two salivary glands. These are glands of 

 considerable size, and they extend a long way down the body, 

 lying in the lateral portion of the body-cavity ; they have a 



Fig. 175. — Peripatus capensis, male, 

 dissected to show the internal 

 organs, x 2. After Balfour. 



1. Antennae showing antennary 



nerve. 



2. Oral papilla. 



3. 31, 3". 1st, 2nd, and 10th leg of 



right side. 



4. Brain and eyes. 



6. Circiim-oesophageal cord. 



6. Ventral nerve cord of right side, 



showing the transverse com- 

 missures. 



7. Pharynx. 



8. Stomach. 



9. Anus. 



10. Male generative opening. 



11. Salivary glands. 



12. Slime glands and reservoir, 



13. Enlarged crural gland of the 



17th leg. 

 14*, 141". 4th and 10th nephridia of 

 right side. 



remarkable origin, since the history of their developement shows 

 that they are modified nephridia, a condition of things which 



