DESCRIPTIONS OF THE SPECIES. 253 



long us in the two first-named Bpecies, but longer than in the latter type (PI. IX. 

 figs. 3, i). The base of the calyx is much more contracted in some individuals than 

 in others, as may be seen from these two figures, and in those with the narrowest or 

 most contracted bases the columnar cavity is deepest. The granular ornament is 

 occasionally arranged near the radio-deltoid sutures in lines parallel to the latter, and 

 is more strongly marked than on other portions of the calyx. 



This species appears to vary to a slight extent in the outline of the calyx, owing 

 to differences in the degree of prominence of the ambulacra (PI. IX. figs. 1, -, 6). 



Localities and Horizon. Grassington, Derbyshire; Whitewell, in Bolland, Lanca- 

 shire; Clitheroe, Lancashire (Presented by the late J. Roto, Esq., F.G.S.): Carbo- 

 niferous Limestone. [Prof. McCoy recorded this as an Irish species, but without 

 locality.] 



Gkaxatocrim's campanulatus, McCoy, sp. 

 (PI. VIII. tigs. 12-15; PL IX. figs. 8-10; PI. X. figs. 9, 10; IT. XVII. fig. 3.) 



Pentremites campanulatus, McCoy, Ann. & Mag. Nut. Hist. 1849, vol. iii. p. 249. 

 Pentremites campanulatus, McCoy, Brit. Pal. Foss. 1851, fasc. 1, p. 123, t. ,'3 d. f. 'J. 

 Pentatrematites campanulatus, lloemer, Archiv f. Naturgescli. 1851, vol. xvii. fid. i. p. 3G1, 



t. 8. f. 4. 

 Pentremites campanulatus, Dujardin & Hupe, Hist. Nat. Zooph. Echinod. 1862, p. 94. 

 Granatocrinus campanulatus, E. & C, Aim. & Mag. Nat. Hist. 1882, vol. ix. p. 239. 

 Granatocrinus pisiformis, E. & C. (MS.), ibid. p. 239. 



Sp. Char. Calyx small, depressed globose, or broadly bell-shaped; summit gently 

 rounded; base broad, truncate, and flattened, almost as wide as the calyx, with a very 

 shallow central concavity ; section above the radio-deltoid sutures slightly pentagonal, 

 but rounded, or even a little decagonal below ; periphery equatorial, or slightly 

 nearer the base than the summit. Basal plates small, limited to the shallow central 

 cavity. Radial plates broadly pentagonal, a little more than half the length of the 

 calyx ; limbs almost flat, with parallel margins, and their upper ends obliquely trun- 

 cate ; lips moderately prominent ; sinuses very long, narrow, and parallel-sided ; 

 interradial sutures not in concavities. Deltoid plates large, unequally rhombic, 

 somewhat concave in the middle line, and constricted at their apices, all five often 

 bearing large prominent nodes. Ambulacra projecting slightly above the edges of 

 the sinuses ; side plates from fifteen to thirty ; lancet-plate not entirely concealed by 

 the side plates; ambulacral groove wide and open; pores almost wholly excavated 

 in the edges of the radial sinuses. Spiracles triangular-pyriform, opening horizon- 

 tally, with thickened edges, and protected on the outer side by the large deltoid 

 nodes. Column circular. Ornament of rather coarsely tuberculated lines parallel 

 to the margins of the plates. 



Remarks. Granatocrinus campanulatus appears to be distinguished by its bell-like 



° v 9 



