SHUMARD AND SWALLOW—NEW FOSSILS. 223 
PoTERIOcRINuS RUGOSUS, Shumard. 
The iodo of this beautiful Poteriocrinus is depressed, sub- 
cal and its under surface broadly excavated. The 
wei is "generally thickly studded with short ruge, strong 
dis but sometimes with granule. 
The bose este is rather small, pentagonal, concave, and profound- 
ly excavated in the middle. The pieces are rhombic, recurved, 
and their lateral edges much the longest. The columnar = 
ies about one-half t e diameter of the 
ust is situated at the bottom of a deep excavation. The 
central osm is small and pentalobate. In the interior 
of the calyx the base forms a strong mammillary swelling. 
‘The sub-radi ‘al pieces are rather es longitudinally recury- 
ed, and slightly wider than long. ur of them are pentago- 
nal, with basal and infero-lateral ites about equal, and supe- 
rior i ks very slightly arched. The fifth piece is hexagonal 
ts superior edge very short. 
ie ngs saber ie a very thick, transverse; i inferio 
oo tient oe Abeer ee — more than double the length 
e superior edge is nearly 
See outwards, the sitachiben facet well developed, and 
pos henam similar to that of the preceding species, though it is 
, 24 Radial pieces.— =There i in the Missoni collection a sin- 
gle 24 are wo i from Putnam Co | ay 
on —— Tt is shor i very ‘thick, pentagon 
’ The articular fi pera amd 
