186 



BK. J. PEARSON ON MAJilNE FAUNA 



[Feb. 1, 



bifurcations. Both the radials and inter -radials are composed of 

 a large number of pieces. 



The retractor muscles connected with the calcareous ring are 

 well developed and are attached to the body-wall half-way down 

 the body. 



Text-fiff. 18. 



i.n 





Cucumaria semperi. 



A. Spicules. X 700. 



B. Calcareous ring. X 16. 



v. = radial, i.r. = inter-radial. 



The deposits agree with Bell's description and figures. The 

 plates in the general integument are subject to considerable 

 variation (see text-fig. 18 A). 



The size of a normal plate is about 40 /j. long and 26 /.i broad. 



General distribution. Port Denison, Torres Straits. 



