20 
Triassic Echinoderms of Bakony. 
which fit into 5 grooves (shown in a, e, g ) on the apposed surface. The sides of 
these grooves are, it is supposed, then raised, and thus is produced a joint-face 
with ten minor ridges (shown in c, d, f), apposed to a surface with 5 major ridges 
bordered by grooves (shown in d). The elevation of the surface between the last- 
mentioned grooves might result in the development of 5 intercalated ridges; but it 
is not easy to say certainly whether there are signs of this. The ridges are raised 
above the central area and sink to the general level of the surface just before 
reaching the periphery, which occasionally shows traces of a slightly raised bounding 
rim (shown in g and h). Thus there is no sign of crenelation at the sutures. 
The following table gives the detaifs. In it R and G stand for major ridges 
or grooves respectively, while r Stands for minor ridges: where possible, a Statement 
is made concerning each joint-face, and it will be seen that major ridges on the 
one surface often correspond to either simple major grooves or to minor ridges 
bounding major grooves on the other surface of the same columnal. 
a 
b 
c 
d 
e 
/ 
g 
h 
Diameter . . . 
1-2 
1'2 
1'3 
1'4 
1'6 
l - 75 
2'3 
3-65 
Height . . . 
PO 
1‘2 
0‘6 
1'5 
P5 
2-0 
2‘0 
P8 
No. of Ridges 
or Grooves 
5R 5G 
?5R 
5R 
10r 
?5R lOr 
? 5G 
? lOr 
5R 5G 
5R ? 
Approximate 
length of ridge 
0-25 
p 
0-4 
0-5 
0-4 
? 
0‘5 
0-6 
Pl 
Curvature 
of sides . . 
convex 
by about 
Vb di am. 
almost 
straight. 
markedly 
convex by 
V 4 diam. 
convex 
by about 
*/; diam. 
strongly 
convex 
Va diam. 
almost 
straight 
almost 
straight 
strongly 
convex 
*/ B diam. 
or more 
Relation s of the species. — The general appearance reminds one of 
the columnar represented in Quenstedt’s «Petrefactenkunde Deutschlands», pl. CVI1, 
fig. 42, from the Wellenkalk of Deubach, and assigned by him to Encrinus lilii - 
formis. Possibly that specimen, though a trifie large, belongs to the Wellenkalk form, 
Holocrinus Wagneri. Both it and our specimens resemble some of the figures of 
joint-faces given by R. Wagner in his account of that species, under the name Encri¬ 
nus gracilis (Jena. Zeitschr. XX, pl. 1, figs. 5 a, 6 b, and pl. II, fig. 6 c). Those spe¬ 
cimens are, however, clearly pentagonal, and the grooves are regarded as stnooth 
petaloid areas directed towards the angles of the column (i. e. interradial in position), 
and surrounded by crenellae, which may, it is true, be very faint. Our specimens, on 
the other hand, are quite or almost circular, and show no trace of crenellae. It is just 
possible that the depressions in the largest of our specimens ( h ) are srnooth petaloid 
areas; but the isolation and prominence of the ridges militate against this view. 
