Apiocuinites. 
RADIATA. CRINOIDiE. 
crinoidj:. 
I. Plates of the body, or pelvis, resting on the last columnar joint, and 
forming the cup containing the viscera articulated with each other by 
lip-like and transverse processes, having a minute perforation. 
Apiocrinites. 
Pentacrinus. 
{Encrinites.) 
II. Plates of the body articulating imperfectly with each other by transverse 
processes, having a minute central perforation. 
Poteriocrvmtes. 
III. Plates of the body adhering by sutures lined by muscular integument. 
Cyathocrinites* 
iCaryocrinites. Zool. Journ. ii. 311.) 
Actinocrinites. 
Rhodocrinites. 
Platycrinites. 
IV. Plates of the body anchylosing with the last columnar joint. 
{Eugeniacrinites.) 
Gen. APIOCRINITES. — Pelvis of five plates, supporting five 
costal plates ; fingers formed of a single series of joints. 
1. A. rotundus — Column round, central ; canal round ; articulating surfaces 
of the columnar joints radiated,— Pear Encrinite of Bradford, Park. Org. Rem. 
ii. 208. t. xvi. f. 1.- — A. rot. Mill. Crin. 18. — In Oolite. 
2. A. Column elliptic ; central canal round ; articulating surfaces 
of the columnar joints transversely ridged ; auxiliary side-arms on the column. 
Bottle Encrinite, Straight Encrinite, and Stag Horn Encrinite, Park. Org. 
Rem. ii. 231. t. xiii. f. 31, 34, 75 — A. ell. Mill. Crin. 33 — In Chalk. 
Gen. XV. PENTACRINUS. — Pelvis of five plates, support- 
ing five costals ; column not enlarging at the summit ; fin- 
gers formed of a single series of joints ; column pentago- 
nal ; the articulating surfaces of the columnar joints petal- 
shaped. 
40. P. eurojpaus . — Arms ten, nearly simple, axillary side 
arms five at the summit of the body. 
Memoir on the Pentacrinus europseus, a recent species discovered in 
the Cove of Cork, with two illustrative plates, 1st July 1823, by J. 
V. Thompson, Esq. F. L. S. 
This valuable addition to the British Fauna was found attached to the 
stems of various species of Sertulariadse and Flustradse, growing in from 
eight to ten fathoms water. Height about three-fourths of an inch, and in- 
vested with a delicate, continuous, gelatinous cuticle. The base of the co- 
lumn is expanded into a convex calcareous plate, by which it is attached to 
