107 
PiiiALOCRiNUS Konincki, Clarl'e, sp. 
PL XVI, Figs. 1-i. 
1? entadia spatangus^ Dana, American Joimi. Sci., 1845, IV, p. 152. 
Pentadia corona, Dana, Wilkes’ D. S. Explor. E.xped., 1SI9, X (Geology), p. 713, t. 10, 
f. 10, 10« (non figs. 11 and 12). 
CgatllOCrinilS Ponuicki, Clarke, in De Ivoninck’s Eoss. Pal Nouv.-Gallcs du Sud, 1877, 
Pt. 3, p. IGl, t. G, f. i-ib. 
CgatJlOCrinus Ponlncln, Etheridge, fil., Cat. Australian Foss., 1878, p. 40. 
Pentadia corona (pars), Etheridge, fil, Loc. dt., p. 40. 
Sp. Char. — Calyx very large, massive, globular and globose ; greatest 
periphery more or less along the basi-radial sutures ; all sutures deep and 
■well marked ; plates of considerable thickness, more or less convex. Infra- 
basal plates quadrangular, slightly unequal in size, forming an inverted or 
reversed cup, on the outer margin of which the calyx rests when placed in 
its natural position. Basal plates large and massive, wider than high, 
irregularly convex, their relative sizes, as compared with the infra-basals 
being very disproportionate ; four pentagonal, but the posterior basal 
hexagonal. Ptadial plates transversely elongated, pentagonal, articular 
surface large, with the internal edges sigmoidal. Pirst tind second costal 
plates broad and tabular ; third costals axillary, and much higher than the 
others. Anal plates flattened, quadrangular, wider than high ; supple- 
mentary anal plates (? or proximal plates of the proboscis) two, side by side, 
resting on the horizontal ventral edge of the anal plate. Columnar facet 
small ; column unknown. Sculpture, apparently none, but highly 
weathered or decorticated specimens with lines concentric to the plate 
outlines, supplemented with radiating ridges. 
Ohs. — This fine species is second only in size to the still larger 
Phialocrinus princeps, described later on. Prof, de Koiiinck’s figure 
represents a Specimen three and a-half inches wide by two and a-quarter 
inches high, whilst the largest of our examples (PI. XVI, Fig. 2) is but 
little less. 
Prof, de Koninck referred P. Konincki, Clarke, to Cgathocrinus, and 
it no doubt presents a resemblance to many species of that genus ; but 
although the anal plate rests directly on the truncated apex of the posterior 
basal, as is also the case in Cgathocrinus, yet the width of the articular facets 
