8 ILLUSTRATIONS. 



Page. 



Plate XXXVII. Cardiaster cinctus (Morton) , 178 



XXXVIII. Holaster simplex Shumard 180 



XXXIX. Holaster simplex Shuinard ; Eiiallaster texauus (Roemer)... 182 



XL. Eiiallaster obliqiiatus Clark 184 



XLI. Epiaster elegans (Slmmard) 186 



XLII. Epiaster elej;au8 ( Shumard) 188 



XLIII. Epiaster elegaiis (Shumard); Epiaster Whitei Clark 190 



XLIV. Epiastor Whitei Clark 192 



XLV. Hemiaster parastatus (Morton) 194 



XLVI. Hemiaster Stella (Morton) ; Hemiaster ungula (Morton) 196 



XLVII. Hemiaster texauus Roemer 198 



XLVIII. Hemiaster Hiimphreysanus Meek and Hayden; Hemiaster 



Dalli Clark '. 200 



XLIX. Hemiaster califoruicus Clark ; Hemiaster Calvini Clark 202 



L. Linthia tumidula Clark 204 



