762 



J. F. GUDERNATSCH 



Fig. 10. Sections through the thyreoid gland of Fundulus. A to C, F. hetero- 

 clitus. A, in the aortic bifurcation; B, anterior to; C, at the second branchial 

 arteries. D, F. diaphanus, in the aortic bifurcation. E and F, F. majalis, anterior 

 to the aortic bifurcation. 



the capillaries show narrower and longer cells, and some of these 

 cells entirely lose their communication with the follicular lumen. 

 The connective tissue sometimes forms an almost complete 

 sheath around the follicles and their capillaries. Red blood cor- 

 puscles in all stages of disintegration are found in many follicles 



