PLATE XCI. 



PAGE 



Chonelasma hamatum, F. E. S., . . . 323 



Fig. 1. A specimen, preserved in alcohol, natural size. 



Fig. 2. Transverse section of the plain body (combination figure) ; x 50. 



Fig. 3. Uncinatum ; x 100. 



Fig. 4. Dermal scopula with S-shaped knobbed prongs ; x 300. 



Fig. 5. Part of a dermal hexact, whose short distal ray is beset with small 

 tubercles ; x 300. 



Fig. 6. Small discohexact with short principal and long S-shaped terminal rays ; 

 x450. 



Fig. 7. Discohexact with long, rough, principal, and short S-shaped terminal 

 rays ; x 450. 



