50 



posteiior is small. The left anterior and left posterior basals are 

 hexagonal, the posterior and right anterior beptagonal and the right 

 posterior pentagonal. 



Kadials five, four being simple and one the right posterior 

 compound as in Dendrocrinus ; the anterior, left anterior and left 

 l)osterior are simple and pentagonal, the right anterior simple and 

 tetragonal, and the right posterior compound and formed of a heptagonal 

 plate followed by a pentagonal one. Following each radial is a series of 

 tetraf^onal, primary brachials, with parallel sutures, of which but five 

 are preserved in any arm of the only specimen collected. The brachials 

 are wider than high tapering slightly upwards, the lowest piece of each 

 arm being nearly or quite as wide as the radial below it. 

 No pinnules observed. 



Anal plate heptagonal, resting on the posterior basal and the 

 lower plate of the right (compound) posteior radial; followed by 

 horizontal bands of hexagonal piecea, the plates of each band or zone 

 alternating with one another, and not in vertical rows as in 

 Dendrocrinus. 



Column pentapartite throughout, with a pentagonal canal, the 

 angles corresponding with the sutures, which are directed radially. In 

 section the column is quinquefoliate at the root, passing up into 

 circular at the base of the cnp. The portions figured do not represent 

 the whole, as some pieces aggregating several inches in length were lost 

 subsequent to the collection of the specimen. The aggregate length of 

 column preserved is nearly ten inches, tapering from 0.18 inch at base 

 to 0.10 inch, at 0.50 inch below base of cup from whence it expands to 

 0.12 inch at its junction with the cup. At the base of the column the 

 the longitudinal sections are composed of flat segments of equal 

 thickness which alternate with those of the adjoining sections instead 

 of abutting ; this portion with its root-like branches, having identically 

 the appearance of the radix figured in Decade 4, G.S.C., as that of 

 hlwdocriniis asperatns. At a short distance fiom the radix these 

 segments are divided by thinner and projecting ones which gradually 

 become wider until they equal the others ; while the vertical sutures 

 change gradually until the segments abut instead of alternating. 



Collected by the author at the City of Hull in the Trenton 



