New Crinoids and Brachiopods. — Rowley. 153 
Stroplionella cras§a. (n. sp.) 
Fig. 4. View of ventral valve, natural size. 
Fig. 5, so drawn that the whole cardinal area is seen, natural size; 
dorsal view. 
Fig. 6, showing the thickness of the shell and shape or outline, nat. 
size. 
Shell semicircular, slightly eared at the cardinal extrem- 
ities. Heavy and thick for a species of this genus. Dorsal 
valve slightly concave from the obsolete beak to the middle, 
convex beyond. Striae numerous, rather small and indistinct 
on both valves, probably due in part to the state of preserva- 
tion of the type. Ventral valve low-convex behind the beak, 
flat toward the circumference. Beak not incurved, slightly 
elevated, giving a wide, low, triangular cardinal area. Both 
valves have areas but there is no deltidium. 
This species is apparently nearly related to S. reversa, but 
is a much larger form, with less concavity to the dorsal valve 
and less convexity to the ventral valve. 
Collected from the Hamilton beds of Callaway Co., Mo., by Mr. D. 
K. Greger. 
Length of the type 1}± inches, breadth along the cardinal line 1 j L. 
Produetclla niarquessi. (n. sp.j 
Fig. 7. View of the ventral valve, natural size. 
Fig. 8. Side view of same valve, natural size. 
This small shell is sub-circular in outline. Cardinal line of 
a little less length than the greatest width of the shell. Ven- 
tral valve without striae but provided with a few slender 
spines, convex. Beak incurved. Cardinal area very narrow, 
scarcely appearing more than a line. Dorsal valve deeply 
concave-, apparently without stria' and spines. Lines of 
growth cross both valves. 
This little Produetclla resembles /'. pyxidata from the 
Lithographic limestone, but is much smaller and from a lower 
horizon. Length of type j 5 ,., widtli ,' : , ; of an inch. 
Specific name given in honor of Prof. E. H. Marquess, of Westminster 
College. 
Collected by Mr. D. K. Greger from the Hamilton beds of Callaway 
Co., Mo. 
Taxocrimis concavus (Rowley). 
Fig. 3. Base slightly turned toward the observer, showing the con- 
cavity. A specimen with arms entire and a short piece of the column. 
Natural size. 
Fig. 9. Basal view of another specimen. Natural size. 
