158 Triassic Echinoderms of Bakony. 
that of A. testudo. The median depression seen in many radioles of A. Buchi does 
not exist in the corresponding radioles of A. testudo; it foreshadows the ridges of 
the spatuliform and trulliform radioles. 
2. Radioli spatuliformes. 
(Pl. X, figs. 246, 247, 251, 252.) 
The specimens examined are the following: 
(MM) In the Palaeontological Museum, Munich. 
d) 
Actual ensthi seer ecmetne ck eee leree) 
Estimatedmlensthiy selene iad 
Actual «width= “% is = 8). arco 
Estimated width . . . 2610 
Inner face 
Thickness of blade over all . . 2:0 
> » » in median line 1°6 
Widthvon anniluss i. eenoIO ms 
Ourecindce Thickness of annulus... . . 24 
Text-fig. 37. 
Original of Munster (1841), pl Ill, f. 11.  Heautotype of Cidaris Buchi. 
Minsrer’s figure, which represents the inner face, is reversed, but Drsor’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 Munsrer’s original diagnosis and 
description (1829), also to the «<a bord saillant» of Drsor (1855). 
At the back of the tablet bearing this and two small fragments is the label 
in Munster’s handwriting «Cidarit: Buchii, S. Cassian nob. » 
e) Actual lengthiy-as mtn eons 
eS PNAKOEN Ayashi 6G om o mo 3 uo er) 
Width) of anmtisess meielseen eure 
Text-fig. 38. Thickness’ >... Ai cea re ee 
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 Gotpruss 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. 
