





^f^ -'-■-^'^, y^^^j^mr <:^-^-\ ^f^^- 



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. Fig. 10. Section of the thyroid gland of Mustelus eaiiis sliowing the anasto- 

 mosis at the point X of the vasa and venae lymphaticae. 



Fig. 11. Typical section of the thyroid gland of Mustelus canis; the intimate 

 relation of the epithelium of the thyroid follicles to the lymphatics and blood ves- 

 vels is accurately shown. 



