BEEDE : TWO NEW CRINOIDS. 23 



sutures are crenulated ; the canal is round and small. Basals five, 

 large, tumid, three hexagonal and two heptagonal, unequal, situated 

 below the infrabasals and forming a large part of the real body cavity 

 of the cup. The three anterior basals are equal, about as broad as 

 high, very convex, the posterior one compressed laterally, superior 

 lateral edges longer than the others ; truncated side for the support of 

 interradial short, side next the radianal long ; the right posterior ba- 

 sal heptagonal very broad, left posterior side very long, side adjacent 

 for the reception of the radianal very short, the latter being situated 

 between the posterior basal and the right posterior radial. Radials 

 five, large, very moderately ascending, placed superior to the basals, 

 five- to seven-sided, quite massive, more than twice as large as the ba- 

 sals, convex, twice as wide as high, upper exterior portion much bev- 

 eled and concave ; plates separated at the corners and often along the 

 line of union ; at the upper union there seems to be an opening that 

 communicates with the calyx cavity between the arms ; right and left 

 l^osterior radials forced apart fully one-half the diameter of either by 

 the interradial and radianal ; the upper surface is faceted the entire 

 width of the plate, two external ridges present and milled; the re- 

 mainder of the surface is nearly flat or a little concave : the plane of 

 these surfaces is not horizontal but the inner side of each is higher 

 than the outside, so that if each were produced inward they would 

 form rather an obtuse cone ; the inner notch occupies about a third 

 of the ujDper surface of the plate. Radianal long, coffin-shaped, curv- 

 ing upward above, about twice as long as wide, pentagonal, side ad- 

 jacent to the right radial much the longer ; the superior side supports 

 an anal which is hexagonal, very thick, six-faceted above, touching 

 right radial for a short distance, one and one-half times as high as 

 wide, widest above, mostly without the calyx. Anal large, heptagonal, 

 very thick, one-third within the calyx, broadest above ; height one and 

 one- half times the width. 



A iDortion of the vault of this specimen remains, somewhat crushed 

 down into the calyx. It appears to have been in the form of a pyra- 

 mid, about as broad as high, composed of rather heavy plates, which 

 were rather rough. It appears to have been rather angular, though 

 it may have been conical. Several rather irregular plates are pre- 

 served, three of which seem to be from around the aperture : they are 

 rather massive, five- or six-sided, nearly smooth on the exterior ; artic- 

 ular surfaces are deeply faceted and roughened, while the articular 

 surfaces of the other plates of the sac are milled. 



Measurements. Height. Width. 



Column segments 1 to U mm. 4^ mm. 



Infrabasals 4 " 3 " 



Three anterior basals 8 " 9 



