304 Puget Sound Marine Sta. Pub. Vol. 1, No. 26 



PLATE 71 



Microphotographs 



Fig. 19. Cross-section of vas deferens of Cancer magister, proximal 

 end. X 52. 



Fig. 20. Cross-section of vas deferens of Cancer magister, distal end. 

 X 52. 



Fig. 21. Cross-section of vas deferens of Homarus americanus, prox- 

 imal end. X 52. 



Fig. 22. Cross-section of vas deferens of Homarus americanus, distal 

 end. X 18. 



Fig. 23. Portion of cross-section of vas deferens of Homarus ameri- 

 canus, distal end, to show details of structure. Note the tunica propria 

 (p) of convoluted portions of epithelium (e). X 52. 



Fig. 24'. Cross-section of vas deferens of Panulirus interruptus. 

 X 21. 



Fig. 25. Cross-section of vas deferens of Astacus leniusculus. X 52. 



Figs. 26-27. Enlarged portions of epithelium of vas deferens of Asta- 

 cus leniusculus to show the cilia (h). X 510. 



