22 



other rcLiular area tluTc are four i)lntes, one in tlie first range, two in 

 the second and one in tlio third, wliich unites with the plates of the 

 vault. Tn the azyjrous area there are seven plates. The first one is 

 ill line witli the first ])riinary radials and about the same size. It is 

 t'ollowcil liy tlii'ce jjlates in the second range and three in the third 

 range. th(^ iniddk' one of which connects with the plates of the vault. 



The vault is conical and bears a large central prol)oscis. Tt is 

 covered with numerous convex polygonal plates. 



This si)ecies. no doubt, has some affinity with B. rcnieuilianiis. 

 but not niucii with any other fourteen-arnied species. In general 

 appearance it does not bear much resemblance to B. i-cniciiHitiinis. 

 because the form and |)rop()rtioii of tile plates are so difTerent: be- 

 side the interradial areas and number of interradial plates are dif- 

 ferent and the number of secondary and tertiary radials do not 

 agree, though each has fourteen and)ulacral openings to the vault. 



Found i)y K. A. V>hiir. in tJie lini-lington (iroup. near Sharon, in 

 Southwest Missouri, iind now in tjie coHection of S. A. Miller. 



I'.ATdcijiNrs uiCLigrrs. n. sp. 



ridlc I, Fiij. I.'i. hiisdl ricir : Fi(j. IC. (iZjiijoiiK siiJc ; Fi;/. 17. Ainil- 



iiiil ncir. 



Species below medium size, bitiirbinate or somewhat wheel-shaped. 

 Caly.x very rai)idly spreading at tiie arms, where it is more than 

 twice as wide as iiigh. No radial ridges, but the radial series are 

 somewhat lobed ami iiioject at the mariiiii so as to notch the cir- 

 cumference at tiie interradial |i,irts. Plates finely granular, the 

 larger ones slightly convex. .Xinlmiacral o])enings directed hori- 

 zontally ami not visilile in a basal view. No ovarian pores discovered. 



Basals form a vi'ry short ra))idly ex])aiuling cup four times as wide 

 as hiuli. Xo basal rim. h''irst primary radials larger than the sec- 

 ond and third together, three hexagonal, two heptagonal. Second 

 primary radials (inadranuiilar. 1 wo or lliri'c I imes as wid(> as long. 

 Third i)rimary radials a little larger than the second; each one of 

 them is hexagonal, axillary, and in each of the lateral rays and in 

 the ray o|)|)osite t lie a/.vgous area support, on each u])])er sloping 

 side, two sei-ondary radials. which gives to each of these three 

 rays two arms. In the ray on, each side of the azygous area 

 the third primary radial sui)])orts. on the distal side, two secondary 

 radials. and on one of the proxinml sides two secondary radials. the 



