Plate 9. 



Page. 

 DOLATOCRINUS MAJOR Wachsmuth and Springer 36 



Fig. 1. A maximum specimen; basal view, showing basal plates nearly 

 resorljed by growth of axial canal. 



2. A minimum specimen, \vith basals in normal condition; nodes on IBr 



produced into spines. 



DOLATOCRINUS MULTIBRACHIATUS Rowley 38 



3. A flattened specimen, \vith details of deUcate ornament ])rought out 



by etching; very sharp thin ridges follow the radial series from base 

 to arms, where 4 arm openings to the half ray are seen, indicating 

 about 40 in all; inner core of stem attached, on which the peripheral 

 flanges of the nodals are mostly broken away. 



4. Lateral view of another specimen, showing 8 arms to the ray. 



DOLATOCRINUS GRANDIS Miller and Gurley 17,32 



5. Specimen with pitted sculpturing, ligured to show the displaced por- 



tions of stem seen in the basal pit, in which the flanged nodals ^\■ith 

 their peripheral cogs, and some internodals, are well exposed; and 

 also the very large size of the axial canal proximal to the calyx. 

 All Onondaga: LouisWlle area. 



DOLATOCRINUS, species; fragments of column 17,18 



6. Transverse view of stem fragment at joint face, probably from toward 



the distal end, showing the small size of the axial canal in that part 

 compared with the proximal portion shown in the last figure. 



7. 8. Two fragments showing the great size sometimes attained by the fin- 



like cogs, which here arch over 10 or 12 internodals. 

 9, 10, 11, 12, 13. Various fragments showing the relation of the nodal and 

 internodal cohimnals, in different stages of development. 

 All from Louisville area: Probably Hamilton. 

 68 



