78 BuLLKTiN 5 348 



290 CRINOIDEA. 



Species. 



I. C. ornatus. Costals, four pentagonal and two 

 hexagonal. 



Column inserted into a cavity at the base of the 

 pelvis : pelvis rather large ; two of the plates quad- 

 rangular, attenuated to the base, where they are 

 truncated and a little recurved at the junction 

 with the column ; disks, particularly towards the 

 base, granulated, with a distinct elevated inter- 

 rupted line ; two remaining plates pentangular, at- 

 tenuated to the base, where they are truncated 

 and a little recurved at the junction with the co- 

 lumn ; disk with elevated granules, and with two 

 elevated interrupted lines, extending to the ter- 

 minal angles : costals, four pentagonal and two 

 hexagonal, all with elevated interrupted lines, ra- 

 diating from the centre to the angles, with a series 

 of truncated granules on each side, and a few gra- 

 nules in the intervening spaces ; interscapulars, 

 two hexagonal, situated immediately above the 

 hexagonal costals : scapulars six pentagonal, the 

 upper sides of which are more or less irregular 

 by projecting a little between the scapulae, all with 

 prominent lines granulated, similar to those of the 

 preceding : arms six : capital plates with a hepta- 

 gonal one in the middle, surrounded by five hex- 

 agonal plates and two irregular ones at the mouth : 

 mouth not prominent, situated on one side of the 

 middle, a little within the line of the arms, closed 



[J. A. N. S., Phila., ist Ser., Vol. IV, 1825.] 



