Fossils of N. E. Missouri.—Rowley. 307 
The column appears to have been rather small with a small 
round central perforation. Arms unknown. 
This crinoid seems to have affinities with Batocrinus, Eret- 
mocrinus and Lobocrinus, agreeing with the latter in the 
lobed character of its arm bases, with Batocrinus in general 
form and wart-like plates. With Eretmocrinus it agrees in 
the character of its basal plates, though somewhat less ex- 
panded, but lacking entirely the inflated ventral disk. 
Its nearest ally seems to be Lobocrinus longirostris. 
It comes from the Cryptoblastus melo horizon ot the Lower Bur- 
lington limestone and the type is from Marble Head quarry a mile 
and a half above Louisiana on the Mississippi river. 
Collected by John Lonergan and presented to the writer. 
Lobocrinus? dubius var. pustulosus n. var. 
PLATE XVIII. 
Fic. 12. Anal side view of the type specimen. 
This fossil has the same plate arrangement as L. dubius, 
much the same shape of body and low, almost flat ventral disk, 
the calyx or dorsal cup expanding moderately to the periphery 
until the width is greater than the depth. 
The basal plates are thin oblique expansions much like 
those of Eretmocrinus but less extended. The plates of the 
ventral disk are nodose and stronger than those of L. dubius, 
while the plates of the dorsal cup are strongly wart-like but 
never flattened as on the latter species. The lobed characte: 
of the periphery is hardly noticeable. The number of arms is 
probably the same in both fossils but as var. pustulosus is half 
imbedded in the limestone this cannot be definitely ascertained. 
From the fourth division of the Lower Burlington limestone, 
Pratt’s quarry, Louisiana, Mo. 
Lobocrinus? insolitus, n. sp. 
PLATE XVIII. 
Fic. 13. Side (anal) view of the type specimen. 
The basal plates of this species are thin and expanded. 
The first radials are large, broader than long and tumid or 
ridge-like. The second radials are four sided and hardly 
wider than long, nodose. The third radials are broader than 
long, ridge-shaped. The second plate above the third radial 
on each side is also an axillary plate with a single piece on 
each side between it and the arm base. The first plate of each 
of the four regular interradial areas is large, with equal length 
