326 S. Vincent, The Comparative Histology of the Suprarenal Capsules. , 



Fig. 10. Section of suprarenal of Acipenser siurio. The body was put into osmic 

 acid about 12 hours after death, and sections were cut with the freezing 

 microtome on the following day. The alveolar arrangement is well seen, 

 and the cell-outlines are admirably preserved. Zeiss H. immers., E. P. 2. 

 Camera lucida. 



Fig. 11. Sectioir through the suprarenal capsule of Biifo vulgaris, shewing re- 

 lation of suprarenal to kidney substance. Low power. 



Fig. 15. Small portion of the medullary substance of the suprarenal capsule of 

 Ovis aries. The section demonstrates the solid cords interlacing in all 

 directions. The interspaces consist almost entirely of capillaries. The 

 body was hardened in methylated spirit, and stained with picrocarmine. 

 The Cell-Outlines are distinctly shewn. 



PI XVIII. 



Fig. 3. Chromogenic cells from central part of a suprarenal body (middle region 

 of Body, Raja clavata). As seen magnified about 700 times. Figs. 1 

 and 3 shew a groundwork of cells which are not chromogenie, probably 

 of the same character as those in fig. 2. 



Fig. 13. Small portion of suprarenal of JJromastix hardmickii, Leitz. Panta- 

 chromat. 30 mm. Drawn with Abbe's Camera lucida. The preparation 

 was a most successful one and my drawing does not adequately represent 

 the clearness and delicacy of the details. The material was hardened in 

 alcohol so that the medulla is not brown, but the protoplasm of its cells 

 has become stained with haematoxylin. 



Fig. 14. Section of suprarenal capsule of Meleagris Gallopavo. The material was 

 hardened in MüUer's fluid and stained with haematoxylin and eosin. A 

 strand of medullary cells, stained brown with the pot. bichrom. is seen 

 running between the cortical column. As seen under a magnification 

 of 480. 



Fig. 16. This fig. represents the appearance of the medulla of Bos taurus after 

 hardening in MüUer's fluid, and staining in bulk with picro-carmine. It 

 is doubtful whether the appearances of these medullary cells are not 

 fallacious and due to shrinkage. 



