78 



Two FINGERS (PL. i. fig. 1.) set off from the cuneiform joint of each hand. 

 They are composed of two series of joints adhering at one of their lateral sur- 

 faces to each other by bevelled edges, in a manner similar to those of Encri- 

 nites moniliformis. 



The TENTACULA. From the joints of the hand and fingers the tentacula 

 proceed, which resemble those of other crinoidea. 



An INTEGUMENT protected by numerous (sometimes very regularly formed) 

 plates, extends as usual over the abdominal cavity and the sulcus on the arms, 

 hands, fingers, and tentacula. 



That the plates increased in size by laminar secretions formed externally 

 as in Apiocrinites rotund us, 1 have been able to ascertain from a decomposed 

 specimen. (PL. i. fig. 26. and 27.) 



I have a joint (PL. 11. fig. 31.) of asubtriangular circumference in my col- 

 lection, which I apprehend may have been an unusual and monstrous form of 

 the superior columnar joints of this species. The central ridge of articulation 

 noticed in the joints described is here divided into three radii, each subdividing 

 where they approach the exterior circumference, into several fine ridges, and 

 thus rendering the margin crenulated. 



In one instance (PL. i. fig. 28.) the pelvis and scapula? are covered with tu- 

 bercles indented at their centre, in my opinion the effects of disease. 



I have noticed in the collection of RICHARD BRIGHT, Esq. of Ham Green, 

 near Bristol, numerous joints, probably appertaining to an animal forming a va- 

 riety of the former, or a distinct species. They came from Muir-kirk in Dum- 

 frieshire. The scapulas are shorter in proportion than those of the former spe- 

 cies, aud the columnar joints are finely tuberculated. 



