Prentiss. — Otocyst Crustacea. 



PLATE 8. 



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. Transverse section through the orifice of both otocysts ; left antennule is 



diagrammatic. X 25. 

 Fig. 38. Parasagittal section through right antennule and brain. X 25. 

 Fig. 39. Tegumentary gland from the sensory cushion of the otocyst. X 600. 

 Fig. 40. Dorsal view of the sensory cushion of the left otocj'st dissected out, 



showing the arrangement and innervation of the hairs. Methylen 



blue. X 62. 



