REPORT 



ON THE 



INVERTEBRATA OF MASSACHUSETTS, 



COMPRISING THE 



MOLLUSCA, CRUSTACEA, ANNELIDA, AND RADTATA. 



/\ u.o ( a. S-Wv* AcU ("Son 



PUBLISHED AGREEABLY TO AN ORDER OP 



THE LEGISLATURE, 



BY THE COMMISSIONERS ON THE ZOOLOGICAL AND BOTANICAL SURVEY 

 OP THE STATE. 



CAMBRIDGE: 

 FOLSOM, WELLS, AND THURSTON, 



PRINTERS TO THK UNIVERSITY. 



1841. 



