Or 
— 
ON THE ANASPIDACHA, LIVING AND FOSSIL. a 
Eucarida. 
aN 
Decapoda. Euphausiacea. 
Hoplocarida. 
Peracarida. 
Syncarida. 
Phyllocarida. 
e noe 
on, < 
5, a 
“2, o> 
Entomostraca. 
e 
Phylogenetic Tree, showing chief lines of descent in the Crustacea. 
R 
VOL, 53, PART 3.—NEW SERIES. 38 
