NOTE ON THE NEW GENUS ULNTACRINUS, GRINNELL. 



Bv F. B. Mekk. 



FiiC. A. 



Fiir. D. 



-<^^ 



Uiniao'lnus socialh. 



Fig. A. — A llattened specimen, consisting of the body, anu-bascj, A. c, wiib some of the 

 central plates broken out. 



Fig. B. — Another specimen in nnicli the same condition, excei>ting tbat all tbo body- 

 plates of one side are seen. The plates of uue iuterradial aiva (middle of ligure) and 

 parts of two others, one on each side, as well as tbo?e of two of tbe iuteraxillary 

 areas, are shaded to distinguish them from the pi itcs of the radial system, wbich lat- 

 ter are marked with dotted lines. 



Ko. 4 7 



