FOSSILS OF THE BHKLDTGTOH GROUP. J/23 



like projections along their backs seen in that species. The stout piii- 

 uuhi- ;i- -i-n extending between the arms present, with the latter, a 

 peculiar sealariform appearance that suggests the specific name. 



Locality and position Upper division of the Burlington group, at 

 Burlington, Iowa. Lower Carboniferous. Xo. 282 of Mr. WACHS- 

 MUTH'S colection. 



SCAPHIOCEIXUS XAXUS, M. and W. 



PL 1, Fig. 8. 

 Scaphiocrinug nanw, MEEK and WOBTHEX. Proceed. Acad. Xat. Sci., Phila., 1869, p. 141. 



BODY very small, expanding rapidly from the column 

 to the top of the first radials. where it is about once and a 

 half as wide as high. Base small, slightly projecting, pen- 

 tagonal in outline, and nearly covered by the round, flat 

 facet for the attachment of the column. Basal pieces show- 

 ing a very short, minute pentagonal facet above the column. 

 Subradial pieces a little wider than long, three with a pen- 

 tagonal outline, and two on the anal side, hexagonal, there 

 being no well denned angle visible at the middle of the 

 under side of any of them. First radials about the size of 

 the subradial pieces, a little wider than long, pentagonal 

 in form, and somewhat rounded on their outer sides, in 

 consequence of the sutures between them being impressed, 

 ond radials longer than wide, or nearly twice as long 

 as the first, all pentagonal in outline and rounded and more 

 or less constricted in the middle, each supporting two arms 

 on its upper sloping side. 



Anal pieces consisting of a double alternating series, the 

 lowest one of which rests between the upper sloping sides 

 of two of the subradials. and supports one side of the first 

 radial on the right, while on its left it connects above the 

 middle with another anal resting upon the truncated upper 

 side of one of the subradials. and connecting on its left 

 with the first radial on that side; above these three or four 

 other pieces are seen between the arms extending up and 

 joining with the base of the so-called proboscis. 



