252 CATALOGUE OF THE BLASTOLDEA. 



form, flat base, nearly median radio-deltoid sutures, and the large nodes on the deltoid 

 plates which protect all the spiracles including the large anal one (PI. IX. fig. 8). 



Prof. McCoy has very justly observed, " If we suppose the lower third abruptly cut 

 off a P. elliptiais" [= Granatocrinus eUipticus, G. B. Sby. sp.], " we should have a good 

 idea of this little species." The broad flat base of G. campanulatus is unknown in 

 any other British species of Granatocrinus, the one which comes nearest being the 

 little G. McCoyi, nobis (PI. X. fig. 16). The position of the radio-deltoid suture varies 

 slightly, being highest in the smaller individuals of the typical form (PI. VIII. 

 fi». 14 ; PL IX. fig. 10), and generally at about the same level as in G. ellipticus 

 (PL VIII. figs. 16, 19 ; PL X. fig. 16). The spiracles are relatively larger in G. cam- 

 panulatus (PL VIII. fig. 12 ; PL IX. fig. 8; PL X. fig. 10) than in this last species 

 or in G. orbicularis (PL VIII. fig. 17; PL IX. figs. 14, 15), and are more like those of 

 G. Derbicnsis (PL IX. fig. 5), the opening being bordered by a distinct rim ; but the 

 present form differs from all these three species, and also from G. McCoyi (PL X. 

 fig. 8), in having a node at the distal edge of the anal spiracle (PL IX. fig. 8). 



The lancet-plate of G. campanulatus is relatively very wide, and the hydrospire- 

 plate is scarcely visible (PL VIII. fig. 15) ; while the pores are in closer relation 

 with the edges of the sinuses than in other species of the genus, the side plates 

 taking but little share in their formation. 



The shape of the calyx presents the usual amount of variation, an extremely 

 flattened form being shown on PL X. fig. 9. The small individual which is figured 

 on PL IX. figs. 8, 9, was formerly regarded by us as a distinct species, which we 

 proposed to call G. piriformis 1 ; but we have since been led to think that it is only 

 a young form with a more strongly granular calyx and larger nodes on the deltoids 

 than occur in mature individuals. 



We are indebted to Prof. T. McKenny Hughes for the loan of McCoy's original 

 types of this species from the Woodwardian Museum, Cambridge. 



Localities and Horizon. Bolland District, Lancashire ; Clitheroe, Lancashire (Pre- 

 sented by the late J. Rofe, Esq., F.G.S.): Carboniferous Limestone. 



Granatocrinus McCoti, sp. now 



(PL X. figs. 5-8.) 



Granatocrinus McCoyi, E. & C, Ann. & Mag. Nat. Hist. 1882, vol. ix. p. 239. 



Sp. Char. Calyx small, slender, straight-sided, elongately nut-shaped; summit 



small, subtruncate; base relatively broad, truncated, flat, with a very small and 



shallow central concavity ; section pentagonal ; periphery nearly equatorial. Basal 



plates very minute, and confined to the shallow central depression. Radial plates 



about half as long as the calyx, or perhaps rather more so ; bodies small ; limbs 



1 Ann. & Mag. Nat. Hist. 1SS2, vol. ix. p. 239. 



