C? 7? 



HANDBOOK 



OF 



INVERTEBRATE ZOOLOGY. 



FOR 



LABORATORIES AND SEASIDE WORK. 



BY 





W. K. BROOKS, PH.D., 



/ 



ASSOCIATE IN BIOLOGT AND DIRECTOR OF THE CHESAPEAKE ZOOLOGICAL LABORATORY 



c 



OF THE JOHNS HOPKINS UNIVERSITY. 



BOSTON: 

 S. E. CASSINO, PUBLISHER. 



1882. 



