49 



is larger than the first, hexagonal, truncates a subradial, and ad- 

 joins the first radial and part of the second radial on the left, and 

 the first and third azygous plates on the right, and is truncated , 

 by the fourth azygous plate. The third azygous plate is shorter 

 than the second, hexagonal, truncates the first azygous plate, and 

 adjoins the first and second radials on the right, and the second 

 and third azygous plates on the left, and supports the fifth 

 azygous plate. The fourth azygous plate extends slightly above 

 the second radial on the left, and the fifth azygous plate some- 

 what more above the second radial on the right, and the alternate 

 arrangement of the plates continues until the area is lost in the 

 proboscis. 



This species is distinguished by its short ovate form and by 

 having fourteen arms as well as by less important characters. 



Found by Prof. A. G. Wetherby, in the Kaskaskia Group in 

 Pulaski County, Kentucky, and now in the collection of Wm. F. 

 E. Gurley. 



BARYCRINUS WASHINGTONENSIS, n. sp. 



Plate IV, Fig. 18, azygous side, there is one too inanij brachials 

 in the ray on the left; Fig. 19, opposite view. 



Species robust, medium size. Calyx higher upon the azygous 

 side than upon the other, somewhat bowl-shaped, one-half wider 

 than high on the azygous side, and nearly twice as wide as high 

 on the opposite side. Plates thick, very tumid in the central part, 

 and having a broadly rounded ridge extending to each adjoining 

 plate, thus giving the calyx a radiately sculptured aspect without 

 depressions at the angles of the plates. 



Basal plates form a pentagonal disc nearly one-half wider than 

 the diameter of the column, and show the radiating surface ridges 

 even on the narrow area surrounding the column. Subradials 

 large, somewhat unequal in size, about as wide as high, four hex- 

 agonal, one heptagonal. First radials of unequal size, much wider 

 than high. Facets for the reception of the second radials con- 

 cave, directed somewhat outward and not extending quite to the 

 superior lateral angles. Second radials very thin and rounded 

 externally. Third radials a little longer than the second, axillary, 

 and support upon each upper sloping side strong arms. The sec- 

 ond and third radials above described are usually called brachials. 

 The ray on the left of figure 13 there shows thres brachials, but 

 —7 



