PLATE LXXXIV. 



PAGE 



Figs. 1-8. AphrocalUstes bocagei, Wright, . . 313 



Fig. 1. Transverse section of the wall ; x 60. 



Fig. 2. An uncinatum ; x 300. 



Fig. 3. Dermal scopula with long, knobbed prongs ; x 450. 



Fig. 4. Dermal scopula with knobbed prongs of usual length ; x 450. 



Fig. 5. Dermal scopula with long, divergent, pointed prongs ; x 450. 



Fig. 6. Oxyhexaster with rays of equal length ; x 450. 



Fig. 7. Oxyhexaster, one of whose axes is somewhat longer than the other two ; 

 x450. 



Fig. 8. Dermal hexact pinulus ; x 450. 



Figs. 9, 10. AphrocalUstes beatrix, Gray, . . 311 



Fig. 9. Oxyhexaster with two elongated, smooth, principal rays on one axis, and 

 simple pointed rays on the other two ; x 450. 



Fig. 10. Oxyhexaster with two very long, echinated, principal rays on the one 

 axis, and simple pointed rays on the other two ; x 450. 



