CRINOIDEA. 75 
widest inferiorly. Four of them are quadrangular, their inferior 
edges rounded, and one is pentagonal and wider than the other 
pieces. In fact, all the radial pieces differ from each other, more 
less, in width. 
The anal piece resting on the base is all that is known. co ane 
Pope nearly the same form and dimensions as the pauing 
piece 
The column, arms, and vaulf, are unknown. 
mensions. —Height of calyx, 44 lines; height of base, 2 lines; 
diameter of same, 4 lines; width of anal piece at lines; 
do. at top, 14 lines. 
For the fine —— this species, from which she Shades: de- 
scription has been drawn, I am indebted to my friend, Prof. L. 
P. Yandell, of Louisville, Kentucky, whose extensive callectioti of 
at sms Na “904 Clarke County, Indiana, where they are asso- 
ciated with Pentremites florealis, P. laterniformis, and Actinocri- 
nus (Batocrinus) icosidactylu 
The calyx entire is very rarely found, as the plates separate 
very readily, at the sutures, but single plates are —_ common. 
I have, also, found the basal plates of this —o t St. Mary's 
Landing, Ste. Genevieve County, Misso 
AcTINOCRINUS MULTIRADIATUS. Mee: ) 
Plt. Fig. 5. 
The ose Bi of this fine species is of medium size, and: its general 
Sadoet eel. <nth: se ae phe tia the he ee The 
pater ae esas more — their warfare: a creel 
