370 Wachsmuth and Springer—Paleocrinoidea. 
posed of five basals, and five equal radials; the latter ws gh 
i e 
right postero-lateral ray was bifureating, toward the se sup- 
a large 
8. 
The original generic description of Bwrocrinus by Volborth 
contains little information respecting the arrangement of the 
plates in the calyx, of which the greater part in the type was 
concealed by matrix. Volborth distinguishes Barocrimus 
rom Hybocrinus dipentas by the greater size of the body and 
slight differences in the structure of the arms. He describes 
also a peculiar “elliptic organ,” placed along the lower corners 
of two adjoining radials and across the angle of the adjacent 
al. This so-called “Volborth’s organ” stands somewhat 
elevated above the calyx, where it forms a kind of excrescencé 
upon the surface. It is said to be closed by numerous small 
polygonal pieces, so arranged that their sutures are nowhere 
continuous with the sutures from the adjoining larger plates- 
