HUmoirs oi tlj« puscunt of Comgaratibe ^wolajgij 



AT HARVARD COLLEGE. 

 Vol. IX. No. 2. 



SELECTIONS 



FROM 



EMBRYOLOGICAL MOiNOGRAPHS. 



COMPILED BY 



ALEXANDER AGASSIZ, 

 WALTER FAXON, and E. L. MARK. 



II.-ECHINODERMATA. 



By ALEXANDER AGASSIZ. 



WITH FIFTEEN PLATES. 



CAMBRIDaE: 



Pn'nteli for ti^e fHuseum. 

 July, 1883. 



