PRENTIss. — Otocyst Crustacea. 
PLATE &. 
All Figures are of Cambarus. Dorsal side is up in Figures 37 and 38 ; in Figure 
38 anterior is at the left; anterior is up in Figure 40. 
Fig. 37. 
Fig. 38. 
Fig. 39. 
Fig. 40. 
Transverse section through the orifice of both otocysts ; left antennule is 
diagrammatic. X 26. 
Parasagittal section through right antennule and brain. X 26. 
Tegumentary gland from the sensory cushion of the otocyst. X 600. 
Dorsal view of the sensory cushion of the left otocyst dissected out, 
showing the arrangement and innervation of the hairs. Metbylen 
blue. X 62. 
