
Plate LI. 
Page. 
AUsiocrinus magnificus, n. sp... 4)... 9... ee 15 
Fig. 1, natural size of a specimen as it lies on a slab; Fig. 2, a free 
proboscis nearly entire and only slightly twisted; Fig. 3, portion 
of same magnified 2% diameters to show more distinctly the 
respiratory openings; Fig. 4, an abnormal branching proboscis; 
Fig. 5, sectional end view of proboscis. 
Hydreionocrinus pentagonus, n. sp... ... 230)... 17 
Fig. 6, view of azygous side showing hight of calyx and upper trun- 
cated face for second radials; Fig. 7, basal view. 
Delocrinus hemisphericus, Shumard 9). 93.30 12 
Fig. 8, side view showing azygous plate and first brachial, with 
spine ; Fig. 9, basal view of same; Fig. 10, inner side of brachial 
spine magnified two diameters. 
Delocrinus missouriensis, 0. Sp..2-..... a5 14 
Fig. 11, side view showing column; Fig. 12, basal view; Fig. 13, 
azygous side view. 

