ON CARBONIFEEOUS ENCKINITES. 487 



(Phillips), mammillaris (Phillips), Koninckii (Grenfell), two or three 

 new species which I hope soon to work out, and probably simplex 

 (Portlock) which I have not yet seen. 



Rhodocrinus on the other hand will contain verus (Miller) ; 

 verisimilis (Grenfell); stellar is (DeKoninckandLe Bioji) uniarticulatus 

 (DeKoninck and LeHon) granulatus (Austin), and'probably^^o5o5ws 

 (Phillips) and costatus (Austin). 



I will conclude by describing a new species of Gilbertsocrinas 

 which I have named Koninchii after the distinguished Professor, to 

 whom all students of the Carboniferous Crinoids are so much 

 indebted, 



G. Koninchii. f See Plate FIT, Jigs. II, 12, I3.y Shape somewhat 

 conical, with prominent arm-bases, base deeply concave, basals not 

 seen, sub-radials considerably longer than wide. 



Eadials — first heptagonal, large, and bearing a large pointed 

 tubercle ; second hexagonal, the two upper side faces small, so as 

 to make the plate nearly square ; third, pentagonal; one of the rows 

 of radials presents the very unusual irregularity of having four 

 radials instead of three — of these the first is heptagonal, the second 

 and third pentagonal, each having lost one of the side faces, though 

 on opposite sides; fourth, pentagonal. I presume this is an 

 accidental irregularity in this specimen. 



Brachials — first, pentagonal; second, hexagonal, chanelled and with 

 the usual orifice ; above are three or four elongated plates surround- 

 ing the circular base of the arms — these latter are set at right-angles 

 to the body, project considerably, and have a central perforation 

 which is larger than in most of the genus. Axillary plates, three ; 

 the lowest hexagonal'; of the others, one is hexagonal and one 

 pentagonal. Inter-radials twelve. The dome is considerably wider 

 than the calyx, slightly elevated; the plates are as large as those of 

 the body. The mouth, eccentric. 



All the plates of the body and dome, with the exception of those 

 round the base of the arms, the second brachials and the sub-radials 

 have pointed tubercles. The five prominent tubercles round the 

 base distinguish this species from all but G. simplex (Portlock), 



