POTERIOCRINID.E EXTRACRINUS. 109 



of these more recent specimens, the name subangularis ceased to be characteristic of one 

 species only. 



Both Miller, and Goldfuss have erroneously represented the two joints of each of the 

 five primary rays of this, and the preceding species, as the second costals and scapulse, 

 and in consequence of this error, the primary or main rays are improperly represented 

 by them as ten in number instead of five. Parkinson has in both cases very properly 

 represented the primary rays as corresponding in number with the ray bearing pieces 

 (scapulae). 



