158 
Triassic Echinoderms of Bakony. 
that of A. testudo. The median depression seen in many radioles of A. Bucht does 
not exist in the corresponding radioles of A. testudo ; it foreshadows the ridges Of 
the spatuliform and trulliform radioles. 
2. R a d i o I i spatuliform es. 
(PL X, figs. 246, 247, 251, 252.) 
The specimens examined are the following: 
(MM) In the Palaeontological Museum, Munich. 
d) 
Inner face 
Outer face 
Text-fig. 37. 
Actual length.17‘9 
Estimated length.21'9 
Actual width.22‘6 
Estimated width ... . . 26 6 
Thickness of blade over all . 2'0 
» '> in median line T6 
Width of annulus.3‘5 
Thickness of annulus.2'4 
Original of Münster (1841), pl III, f. 11. Heautotype of Cidaris Buchi. 
Münster’s figure, vvhich represents the inner face, is reversed, but Desor’s copy of 
it is turned back again. This face shows the broad ridges. The SW. margin of 
the outer face is raised, and this feature presumably corresponds to the «marginatis» 
and «mit einem wulstigen Saume gerandet» of Münster’s original diagnosis and 
description (1829), also to the «ä bord saillant» of Desor (1855). 
At the back of the tablet bearing this and two small fragments is the label 
in Münster’s handwriting « Cidarit: Buchii , S. Cassian nob.» 
e) Actual length.8'8 
Actual width.8'0 
Width of annulus.3‘75 
Text-fig. 38. Thickness.2'75 
This fragment is on the tablet with MM, d, and MM, g, and being the left- 
hand one of the three specimens appears to be that designated in the label as 
«Original-Exemplar — a, zu Goldfuss Petrefacta Germaniae I. tb 40 fig. 5». The 
substance of the specimen is very dark, almost black, and shows no signs of recent 
fracture. It does not agree with the description or figure of the holotype. In this 
specimen the base is short, and the acetabulum and annulus are much curved 
and folded. 
No specimen corresponding with the holotype can now be found. 
