SALENID^. 



39 



details or available figures, nothing more definite can be stated regarding 

 his specimen. 



In the Report on the '' Challenger " Echini' the detailed drawing's of 

 the abactinal system have not been uniformly placed in their correct theo- 



Salenia miliarts 



retic position, with the axis passing through the anterior ambulacrum 

 pointing upward so as to bring the madreporic body on the right of the 

 odd anterior ambulacrum. This has misled Duncan in assuming that I 

 placed the madreporic plate of Salenia in a posterior position and to 

 the left of the anterior axis. This is nlost unfortunate, as I am the last 



10 mm. 



Fig. 62. Salenia Pattersoni. 



to suggest any other position for the madreporic body than that I have 

 always recognized with Desor, Cotteau, Loven, Duncan, and others. 



Although the suranal plate of Salenia recalls the large anal plate of very 

 young Echini, yet it never becomes a part of the anal system proper. It 

 seems more to be the remnant of one of the suranal plates of Acrosalenia or 

 of Gauthieria. 



1 A. Agassiz, "Challenger " Echinoidea, PI. TV. 



