218 Mr. F. A. Bather on British Fossil Crinotds : 
readily than the English specimens, the angle with the hori- 
zontal varies between 35° and 85°. 
The average measurements of the Gotland specimens are 
considerably greater than those of the English specimens, but 
no other difference is obvious. 
In such very well-preserved specimens as E 6003 (PI. XIII. 
fiz. 12) a fine shagreen ornament is seen on the cup-plates ; 
this, however, is usually worn away, and it may be doubted, 
from the smoothness of some otherwise perfect specimens, e. g. 
i. 1450, whether it was always present in life. In the fossils 
its place is occasionally taken by a rough surface, that 
presents much the same appearance to the naked eye, but 
which consists of irregular pits rather than elevations 
(Pl. XLII. fig. 7). This roughness appears to be caused by 
weathering along the lines of the original intimate structure 
of the plates. A specimen of this species, so weathered, was 
named by Angelin C. alutaceus. 
The Arms dichotomize regularly, and lessen in thickness 
quite gradually, remaining rather stout even to their extre- 
nities. ‘Lhe ossicles are rounded and slightly swollen, and 
often might be described as moniliform, whence, no doubt, 
Salter’s MS. names of C. montie and CO. nodulosus ; some- 
times, however, they are more even in thickness. In the 
proximal region of the arms the brachials are roughly circular 
in transverse section, but become more laterally compressed 
in the distal region (zineotype, p. 211, fig. 4). The axial 
canal is very distinct and is situated just about the middle of 
the ossicle. ‘I'he ventral groove is a broad, curved, shallow 
depression (Pl. XIII. fig. 106). In the young specimen 
(zincotype, fig. 5a} the axial canal is not yet separated by 
stereom from the ventral groove, even in the primibrachis. 
‘he covering-plates are long, thick, and conical both in out- 
line and longitudinal section (PI. XIII. figs. 10 a, L0c, and 
zincotype, fig. 4). They interlock, and run from two to three 
and a half to each brachial. They are sometimes rather flat 
and narrow, with parallel sides, at other times more rounded 
and conical; the former variety is shown in the top lett- 
hand corner of Pl. XIII. fig. 2. 
I Br from 3 to 5. When there are 3 then I Br, is gene- 
rally twice as high as 1 Br; ; when there are 4 then I Bro and 
1] Br; are usually much higher than the rest; when there are 
5 they are all more of asize. Three is by far the commonest 
number. ‘Che number of I Br may vary in the several arms 
of an individual, but is generally the same, 
11 Br from 2 to 4. As with I Br, 3 is the usual number, 
aud I] Brg is often higher than Il Bry. 
