and a Crinoid from Ohio and Indiana. 259 
} 
rather deep, and moderately wide ambulacral furrows. Adam- 
bulacral pieces rather more than twice as long as wide, with their 
longer diameters at right angles to the ambulacral furrows, and 
rounding over from end to end so as to be most prominent in 
the thiddte ; while they do not connect with each other by flat 
sides, but have little projecting processes, and corresponding 
sinuses, shar for the purpose of imparting greater flexi- 
bility to the rays. 
Breadth of body, 0°63 inch; length of rays, 2°40. inches; 
breadth of same at their connections with ‘the body, 0°36 
inch. Diameter across from the tips of rays on opposite sides, 
about 5°50 inches. 
Not having seen the under side of the body of this species, 
Lam not quite sure that it is exactly congeneric with Mr. Bil- 
from which it also differs in a mar in the much 
greater length and slenderness of its rays. In these characters, 
however, it agrees nearly with his S. pulchellus and S. 
ment, nor their arrangement, can be very clearly made out. 
They seem, however, to connect with these pieces along their 
Joming edges, instead of springing from their crests. 
Adopting the suggestion already made by another, that the 
hame Stenaster for this group should be replaced by McCoy's 
name, Urastrella, previously suggested, incidentally, for a 
parently congeneric forms, the name of the species here de- 
scribed would become Urastrella grandis. ; 
Locality and position.—Upper part of the Cincinnati group at 
7 lana. I am de igati Mrs. M. P. 
es of Richmond, for the use of the only 2g p> I have 
seen of this species, which was discovered by her at that place, 
some time back. It may not be out of place to state here, that 
this lady has by her own zeal and industry, stimulated by a 
for scientific studies, succeeded in getting together one of 
the finest and most valuable private collections of minerals and 
in the West. 
