24 
BULLETIN OF THE LABORATORIES 
Fig. II. Larva of Limnetes when .5 mm. long, showing withdrawal of the 
hypoderm and its contents from the walls of the antennules and labrum. A, an- 
tennules inside the sheath formed by their old covering. Z, labrum inside its old 
shell, Zi. 
Plate X. 
Fig. l. Head of male, nearly adult. 
Fig. 2. A typical foot of the same. 
Fig. 3. One of the swimming feet of Limnetes. 
Fig. 4. Outline of the head of Limnetes, after the metamorphosis, showing 
relation of labrum and antennules and also the position of the beak, eye and sen- 
sory fleck. 
