11 



gradually merge into the joints of the lower end, which are but 

 slightly rounded, and are about as wide as long; surface of 

 plates quite smooth. 



LECANOCRINUS EXCAVATUS (N. Sp.). PI. i, fig. 7. 



Calyx small, cup-shaped, .with a shallow groove of the width 

 of the radial plates extending around the body; base large, 

 depressed, forming an inverted cup slightly larger than the col- 

 umn. 



Arms long, stout, divergent at the bifurcations. 



Column large at its upper end, from which point it tapers 

 for one-half of its length, beyond which it is of even thickness, 

 terminating in a tapering root which throws out lateral rootlets 

 at irregular intervals. Basal plates low and wide, about one- 

 half of their height projecting beyond the rim of the inverted 

 cup which they form; sub-basals about as high as wide, and are 

 quite regular in their formation on the anterior side; interca- 

 lated plate quadrangular, of medium size; first radials wide and 

 low, about two to one; upper sides curved downwards, and are 

 bent inwards along their central lateral diameter, forming a 

 wide, shallow, trough-like depression around the upper part of 

 the calyx, which follows the downward curvatures of the plates 

 in which it is placed; interradial plate long, projecting slightly 

 above the first radials; second radials free, wide and low, about 

 four to one; third radials of about the same, size as the second, 

 except that they are elevated into an obtuse, upper, central angle; 

 above this the arm-joints bifurcate; the first lateral pieces being 

 joined by a median suture, above which they are free; they 

 again subdivide at about the fourth joint in the same manner, 

 the first plates being united by a median suture. 



Column composed of irregular joints, with projecting rounded 

 margins. 



LECANOCRINUS PUTEOLUS (N. S. P.). PI. I, fig. 8. 



Calyx bowl-shaped; base small; outlines slightly angular; 

 surface finely granulose; column and arms unknown. 



