EXPLANATION OF PLATES. 



PLATE 27. PAGE 



NUCLEQCRINUS ANGULARIS, Lyon, Rowley. 82 



FIGS. 1, 2-3 — Summit, basal and anal views of 



three different specimens.  

 FIG. 4. — Opposite side view of sptcimen figure 3. 



NUCLEQCRINUS VENUSTUS, Miller & Gurley, Rowley. 82 



FI G S. 5, 6, 7-S. — Ventral, dorsal, anal and opposite 

 side views of four ditf'erent specimens 



NUCLEQCRINUS STICHTERI, N. Sp. (Rowley.) 83 



FIGS. 9, 10-11. — Anterior side, anal and ventral 

 views of the tjpe specimen. 



NUCLEQCRINUS GREENEI, Miller & Gurley, Rowley. 83 



FIGS. 12. 13, 14-15. — Dorsal, ventral and opposite 

 side views of four dilferent specimens. 



FIG. 16. — Side view of a large specimen, appa- 

 rintly of this species, 



NUCLEQCRINUS VERNEUILI, Troost, Rowley. 79 



FIG. 17. — Ventral view of an elongate specimen 

 from which the substance of the summit 

 plates has been removed, leaving five pits 

 or depressions instead. 



FIG. 18-19. — Side and summit views of a deformed 

 specimen with but four ambulacra, and 

 showing the roof of small plates over the 

 summit opening. 



FIG. 20. — Side view of a specimen in which the 

 anal plate is bounded either side by an 

 elongate, triangular plate. 



FIG. 21. — Basal view of an elongate specimen, 

 showing the pentagonal pit, the three short 

 ridges and a stem joint. 



FIG. 22. — Side view of a specimen with an appa- 

 rent, elongate, triangular plate, either side 

 of the anal plate. 



FIG. 23. — Summit view X 2 of a specimen with a 

 ventral roof of small papulose plates. 



FIGS. 17 to 23.— See page 81 



NUCLEQCRINUS IMITATQR, N. Sp., (Rowley.) 84 



FIGS. 24, 25, 26-27. — Anal, opposite side, ventral 



and dorsal views of four dilferent specimens. 

 FIG. 28.— Ventral view of figure 24. 



