122 ME. p. II. CAEPENTER ON THE GENUS ACTINOMETEA. 



(A'l, 1'.,) by vliich each is connected with the central nervous envelope of the quinquelocular 

 organ. The other branches (Xj, I'l) of the two primary cords {X& I') combine to form the 

 axial cord of the radius D. The inner end of its first radial is seen in the centre of the upper 

 part of the figure (r,), separated from those of C &, Ehy the axial interradial canals [a.i.c). 

 Fig. 8. A section rather further from the centre of the calyx, showing the first radial of D cut trans- 

 versely, witli the closed central end of its radial space {r.s.). At the sides of the latter are 

 the expanded dorsal ends of the axial interradial canals seen in fig. 7 ; they arc received in 

 depressions {s) at the central ends of the I'ays of the basal star, which arc ossified around 

 the vertical fibres {S.2) only, and not, like the stouter more peripheral portions of the rays, 

 around both vertical and diverging fibres, as is seen in Plate III. fig. G, Si, S^- 



