HEDERELLA. 



(Page 599.) 



HfiDERELLA CIERHOSA, Hall. 



Fig. 10. A colony, natural size. 

 Fig. 11. A portion of the preceding. x6. 

 Hamilton group. York^ N. Y. 



Hedeeblla canadensis, Billings. 



Fig. 12. An enlargement of a colony, showing an unusually compact 



growth. x6. 

 Fig. 13. An enlargement showing more distinctly the form of the eel 

 apertures. xl2. 

 Hamilton group. New York. 



669 



