142 T. S. Hall : Marsiqnum in Echinoid. 



appeared in part 4, the finajl part, of the volume- for 1891. Both 

 species are recorded on the same page of the Zoological Record. 

 The fact that S. patella has been familiar to Australian geolo- 

 gists a« a manuscript name of Tate's is no argument for its uae, 

 but till the question of priority is settled I shall use Tate's 

 name. 



The present specimens, with the marsupiura, are not, I think, 

 separable, though in most of them the pentagonal outline is 

 decided, and I think they may be regarded as S. patella. I 

 have found one or two specimens from Mount Gambler also 

 showing the marsupium. 



