36 



part of this animal, so far as the state of the specimens of this species have 

 allowed me to trace them, it perfectly resembles Apiocrinites rotundus. As hi 

 that species, the SUPERIOR COLUMNAR JOINT is on its upper surface divided by 

 five ridges, admitting in the concave spaces the five joints of the PELVIS, each of 

 these terminate above in an elevated ridge, and in the interstices between 

 them the insertion of the five FIRST COSTAL JOINTS takes place. The funnel- 

 shaped cavity in the centre, resembles that of the former species. The exterior 

 muscular integument sometimes appears to have hidden the insertion of the 

 joints, (4.) and its contraction will account for the folds which occasionally occur 

 on the surface. I have as yet seen no specimen continued beyond the first 

 costal joint, but apprehend that the following ones, the scapulae, &c. will also 

 be found to resemble those of Apiociinites rotundus. 



The STRAIGHT BOTTLE ENCRINITE described by Mr. PARKINSON, is, pro- 

 bably, only a young individual of our species, or perhaps, a much contracted 

 specimen, having apparently hardly sufficient character to be considered as a 



variety. 



The STAG-HORN ENCRINITE of the same author, I apprehend to be part of 

 ihe column of our species, near the base sending off its auxiliary fibres, and 

 thereby forming a fascicular ramifying root, by which the animal attached itself 

 to extraneous substances. That these specimens really formed the roots of our 

 present species, and not portions of a distinct animal, I am induced to believe 

 from having noticed that the mode of articulation of their joints when it can be 

 clearly traced, appears to me to present the same character as has been noticed 

 in the columnar joints described above; and although the proportions of these 

 radical joints are much thinner, broader, and frequently irregularly bevelled, so 

 :as at first sight to militate against this appropriation ; yet a similar difference 

 (between the upper columnar and radical joints of other genera, will hereafter 

 [be pointed out. 



