1881.] 



PROF. F. J. Bf:LL ON THE GENUS ASTERIAS. 



501 



A. eequnJis probably belongs to this group ; but we have not suffi- 

 ciently definite information as to the number of the madreporic plates, 

 or of the rows of adambulacral spines.] 



Sp. incertee sedis. 



fungi/era. 



^ Sometimes one of the pair of spines disappears from certain plates. 



