S, Lyon and S. A, Casseday on new species of Crinoidea, 241 
Dimensions of large Specimen. 
Height of calyx, - -  - - 95 inch, 
“ “ vault, * uae Ji OF ae oe 46, % 
“ “ base, = “ eS = 5 2 20 «« 
Length of proboscis (not complete), ns iz oe 1°30...* 
Height of calyx, vault and proboscis, - - ta SRE! 
ngth of arms partly concealed, - - = - 3°45. * 
Geological position and locality. Imperfect, but recognizable, speci- 
mens occur at the quarries near Louisville and Nashville Railroad, Clear 
Creek, Hardin Co., Ky., associated with Eretmocrinus magnificus, &c. For 
the specimen figured we are indebted to the cabinet of O. A. Corey, Esq., 
who with praiseworthy liberality, placed at our disposal the whole of his 
splendid cabinet of erinoidea. ‘A. grandis is nearly related to A. turbina- 
tus, Hall (Iowa, p. 587, pl. ii, fig. 1), also to A. longirostis (Ib., pp. 589, 
590), from both of these our species differs in the ornature of the pieces, the 
number of arms, and so far as may be determined, by the figure and de- 
scriptions referred to, by the pieces covering the proboscis and the vault, 
and the number of pieces composing the anal and interradial fields. 
ACTINOCRINUS, Miller. 
Sub-Genus, Erermocrixus, Lyon and Casseday. 
? 
eral appearance as to be instantl nized. The structure of 
Generic Formula. ie 
Basal pieces, 3 large and extending beyond the calyx. 
Radial “ "3x 5, very small. 4 
Brachial“ 3x26. 
Tnterradial “ 24, one larger and one smaller. 
6x 2 
Interaxillaries, 0. 
Froboscidiferous. so oe 
_ Arms, 26, long paddle shaped, deeply grooved on the inner 
face, fimbriated on both sides of the groove. 
ong generic name was sugg' by the oar-like arms of this 
Splendid crinoid. ee sete 
