PRENTISS. — Otocyst Crustacea. 
PLATE 5. 
All Figures are of lobster larve. In Figures 23 and 25 dorsal is up, and anterior 
at the right ; in Figure 24 dorsal is up and lateral is at the right; anterior is at 
the right in Figure 26. 
Fig. 23. 
Fig. 24. 
Fig. 25. 
Fig. 26. 
Parasagittal section through the antennule of the third larva. X 168. 
Transverse section through the posterior part of the right otocyst in 
fourth larva. X 168. 
Parasagittal section of the same. X 125. 
Diagrammatic dorsal view of floor of right sac dissected out to show 
arrangement of the hairs and their innervation. Methylen blue. 
x 168. 
Developing hairs of the otocyst in the third larval stage. X 600. 
