

9*7 



: 



Boston Society of IRatural Ibistonx 





11 ' ♦ \ 



GUIDES FOR SCIENCE-TEACHING. 





No. VII. 





Worms and Crustacea. 



1 



By ALPHEUS HYATT. 





3 3935 



• 



I 



V 





BOSTON: 





D. C. HEATH & COMPANY. 





1889. 



i 





