S ALEXIA MILIAEIS. 



49 



specimen of 5 mm.. Fig. 50 (PI. 16, fig. .'), in which the second set of anal 

 plates has found its way between the original plates, ami the third set 

 between those of the second. In a somewhat older specimen, 8 mm., Fig. 80 

 (PI. 16, fig. ',) the third set of plates has greatly increased in size, and a 



SALENIA MILIARIA. 



fourth set has made its appearance. In a specimen of 10 mm. (PI. 16, fig. 6) 

 a fifth set of plates has been added, and the five primary anal plates are 

 now separated by plates nearly as large as they are, Fig. 81. The plates 

 of the different series do not always push their way through the preceding 



5 mill. 



Fig. 82. Salexia mii.iaris. 



series; they are frequently split, and thus odd, intercalated, small plates 

 break the uniformity of the arrangement. 



The actinal system has originally ten large buccal plates arranged in 

 pairs (PI. 16, fig. l) occupying, in a* young specimen of 5 mm., the greater 



