REPORT 



ON THE 



INVERTEBRATA OF MASSACHUSETTS, 



COMPRISING THE 



MOLLUSCA, CRUSTACEA, ANNELIDA, AND RADIATA. 



PUBLISHED AGREEABLY TO AN ORDER OP 



THE LEGISLATURE, 



'J 



BY THE COMMISSIONERS ON THE ZOOLOGICAL AND BOTANICAL SURVEY 



OF THE STATE. 



CAMBRIDGE: 

 FOLSOM, WELLS, AND THURSTON, 



PRINTERS TO THE UNIVERSITY. 



1841. 



