52 



PAXAMIC DEEP SEA ECHINI. 



In a specimen of 13 mm. (Pis. 17, figs. 7, 2; 18, figs. 3, Jt) the seventh 

 pairs of interambulacral plates are fully devefoped in all the areas except 

 the left anterior, and the eighth pair is indicated in two of the interam- 

 biilacra, Fig. 85. The first pairs of actinal interambulacral plates are still 

 in contact with the actinal system, but of course they have become greatly 

 reduced in size from the early stages examined (PI. 16, figs, i, 2) when the 



HE 



13 mm. 



Fig. 85. Sai-exia miliaris. 



first actinal interambulacral plates were of full size. The first ambulacral 

 plates not flowing continuously, but having only a most limited resorption, 

 are only gradually somewhat reduced in size in the successive stages of growth. 

 This species is, like most Saleniiii 1 have seen alive, brilliantly colored, 

 though not as strikingly as S. Patiersoni. In S. miJiaris the papilla^ of the 

 test are a dark violet, while the primary radioles are a brilliant white 

 enamel. On tho apical system the sessile vcrruciv are light claret color. 



