222 Mr. F. A. Bather on British Fossil Crinoids : 
Height Width below. Width above. 
millim. millim. millim. 
(4) Sc caperoexe 23 8(?) 21 (?) 
(Drama 23 7°25 28 (?) 
(e) Sacer 19°75 8 21 (?) 
I BB 5, pentagonal, rather wider than high. 
Height. Width below. Width aboye. 
millim. millim. millim. 
(GQ) 6 4:75 7°75 
Ne at 5D 42 7 
Cree 55 4 65 
BB 5, hexagonal; post.B, seen partially in 6, heptagonal. 
Height. Width below. Width above. 
millim. millim, millim. 
(2) ee acre 12 95 115 
(B) code ae 10:2 8:5 1 
KG)ie astette 10°75 8 10°5 
The measurements of post.B are height 12 millim. in 6; 
otherwise unknown. 
RR 5, shield-shaped; projecting in a slight bulge just 
below the articular facet, but not curving inwards much 
towards the radial processes. The facet is smoothly con- 
cave, with a very slight trace of a ridge; the axial canal is 
not separated from the ventral groove by stereom, but, 
together with it, forms a deep notch. Measurements are :— 
Width of 
Height. Width below. Width above. facet. 
millim. millim. millim, millim. 
(2) aces. 12:25 12 
(6) feenre 4 B:5e(8) 10 10°5 2 
(aera ee me ier" 10:3 10:3 5 
From which it appears that the sides of the radials are almost 
parallel and that the width of the facet is just half that of 
the radial. The facet is almost at right angles to the slope 
of the side and is therefore directed almost upward. 
A portion of anal w is preserved in b. It is about 6°5 
millim. high and about 5 millim. wide below. 
A portion of vt is also preserved in this specimen. 
A marked concentric ridge surrounds all the cup-plates at 
a distance of about ‘75 millim. from the suture. There is 
also an irregular ornament on the plates, which tends to run 
in concentric circles (Pl. XIII. fig. 18), or may have a more 
radiate arrangement (Pl. XIII. fig. 14). 
The characters of the Stem may be inferred from the 
bottom of the cup, which shows a very large quinquelobate 
axial canal, shown in Pl. XIII. fig. 17, where it has a mean 
