P LA TE X ri. 



Fig. 1. Glyptocrinus kichardsoni— Azygos side. 



la. Portion of ray of same enlarged, showing fixed piunulse. Dr. Welch's collec- 

 tion. 



Fig. 2. Cromyocbinus gracilis— Basal view, magnified two diameters. 



2a. Azygos side, natural size. 



2&. Opposite side, natural size. 



2c. View of ventral tube, two diameters. 



2d. Inside view of arm with pinuulte, two diameters. 



2e, Inside view of arm without pinnulse, two diameters. 

 Fig. 3. Synbathocrinus granuliferus— Azygos side. 



3a. Opposite side. Prof. Wetherby's collection. 



