CKLVUDS AND BLASTOIDS. 207 



ALLOCRLMS TYPCS (nov. sp.) W. & Sp. 



PI. XIV, Fig, 7. A specimen with arms. 

 PL XIV, Fig. 7 a, b. Calices of the same. 



Below medium size. Calyx depressed, very small, without or- 

 namentation: the arms massive, comparatively stouter than 

 those of any other Crinoid known to us. Basals small, almost 

 covered by the column; disk-like, bending neither inward nor 

 outward; suture lines indistinctly marked. First priniar3 r 

 radials large, abruptly curved, the lower portions forming an 

 inverted shallow basin, of which the basal disk forms the 

 bottom part. The upper half of the plates is bent upward, and 

 forms, together with the other plates of the calyx, a shallow, 

 somewhat spreading cup with straight sides, resting on the pro- 

 jecting median portions of the plates. The second and third 

 primary radials have almost the form of brachials, but are con- 

 nected laterally by interradials. They are very short and rest 

 upon the first radials in a similar manner as the brachials of 

 the Cyathocrinidae upon their radials, and, owing to the deeply 

 depressed interradial spaces and the peculiar form of these 

 radials. it looks as if they were free plates. 



Arms ten, uniserial: composed of transverse pieces of a similar 

 form but larger than the preceding radials. and like them with 

 parallel upper and lower faces. The arms are much wider mid- 

 way. than at the two ends, tapering considerably, and uniform- 

 ly toward the tips, and in the same proportions toward the 

 first radials. where the arms actually commence. 



The interradial spaces are deeply depressed; they are com- 

 posed of two large plates, vertically arranged, of which the first 

 piece is smaller and nodose, and extends to the top of the pri- 

 mary radials, while the other rests between the secondary 

 radials and forms, to some extent, a part of the ventral sur- 



