PRENTISS. — Otocyst Crustacea. 
PLATE 4. 
Figures 13-18 are of Palemonetes. Figures 19-22 are of lobster larve. In Figures 
19-21 dorsal side is up and the lateral side is at the right; in Figure 22 anterior 
is at the right, dorsal side up. 
Fig. 13. 
Fig. 
14. 
alias 
1G}. 
mite 
als: 
ig. 19. 
20. 
ai 
22s 
Portion of inner flagellum of first antenna, showing olfactory hairs and 
their peripheral ganglionic masses. Methylen blue. X 125. 
Gustatory hairs and nerve elements from the basipod of second maxilia. 
Methylen blue. X 95. 
Fibrillations in peripheral otic nerve fibre. Methylen blue. X 1800. 
Ganglion cell of otocyst and peripheral nerve process surrounded by 
myelin sheath. > 600. 
Ganglion cell of otocyst, and sheath nucleus. X 1500. 
Ganglion cell of otocyst. Methylen blue.  X 770. 
Transverse section through right antennule of first lobster larva. X 168. 
Transverse section through right antennule of second lobster larva; 
beginning of invagination. X 168. 
Transverse section through right antennule of third lobster larva. 
x 168. 
Parasagittal section through antennule of second lobster larva. X 168. 
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