OF THE PARASITIC ISOPOD A. 
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Fig. 2. 
B 
D 
M 
Diagrams illustrating the curvature of the embryo. 
A. Mysis (Yan Beneden, Bull. Acad. Roy. Belg., t. xxviii., 1869). B. Cymothoa. 
C and D. Oniscus (Bobretzky, Zeit. fur Wiss. Zool., bd. xxiv.). 
U 
MDCCCLXXVTIJ. 
