328 EDWIN S. GOODRICH. 



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1889. 



EXPLANATION OF PLATE 24, 



Illustrating Mr. Edwin S. Goodrich's paper on "The Reno- 

 pericardial Canals in Patella." 



All the figures refer to Patella vulgata. 



Figs. 1, 2, 3, and 4. — Four transverse sections through the region of the 

 rectum and pericardium, showing the course of the two reno-pericardial canals. 

 Drawu with the camera. X 9. 



Fig. 5. — Reconstruction of the opening of the right canal into the right 

 kidney. 



Fig. 6, — Section through the opening of the right canal into the right 

 kidney. Cam. X 130. 



Fig. 7. — Section through the opening of the left canal into the left kidney. 

 Cam. X 130. 



Fig. 8. — Section through the wall of a reno-pericardial canal, showing the 

 flat coelomic epithelium on the inside and blood space outside. 



Fig. 9. — Section through the wall of a kidney, showing the large excretory 

 cells. 



