184 Triassic Echinoderms of Bakony. 
The second statement is perfectly true if the Pachycardientuffe radioles be 
compared with the Cassian C. scrobiculata; but when the true C. dorsata is in question, 
then the kind of change invoked by Dr. Brom is admirably seen in the Raiblian 
mutation marginata, and this has not the character of C. scrobiculata. 
The third argument loses its force when one recognizes that the granulation 
was developed in the Cassian C. scrobiculata. No amount of weathering will turn 
an undoubted C. dorsata into C. scrobiculata or vice versa, and the very different 
nature of their ornament is clearly shown by the enlarged figures given herewith 
(Pl. XI, figs. 317, 334, 337—339). 
The radioles of C. scrobiculata not only present the slight mutation from the 
Cassian to the Pachycardientuffe type, but in each set they have varying shapes 
probably correlated with their position on the test, the pyriform ones being presum- 
ably adoral, and the truncate ones adapical. 
In all respects then the radioles to which the name C. scrobiculata has been 
applied present sets or series parallel to those of C. dorsata, and at no point do 
I] recognise a clear transition from one supposed species to the other. 
Material from Bakony. — A single ill-preserved radiole from the 
Cassian bed e of Section VI at Veszprém (fig. 336). 
This fragment, which consists of the shaft only, is 4°2 mm. long, with a mean 
diameter in its thickest part of 3 mm. The shape is pyriform, tending to globose, 
and the surface, though worn, shows distinct traces of the characteristic pits, 
especially in the distal region. 
«Cidaris» fustis. 
(Plate XII, figs. 34C, 341.) 
1865. Cidaris fustis G. C. Laupre, Denkschr. Akad. Wiss. Wien, Math.-Naturw. Cl., XXIV, Abth. 2, 
p. 290, pl. x, f. 4, 4a. 
1875. Cidaris fustis LAUBE, A QUENSTEDT: Petrefactenk. Deutschlands, p. 198, pl. Ixviii, ff. 92—95. 
Lause’s diagnosis is: Radiolus cylindricus, facies undique glabra, collis 
brevis, fossa articularis parva, glabra. 
Discussion of Cassian specimens. — This species is very doubtful. 
It is exceedingly rare, and such few specimens as have been referred to it 
are ill preserved. In the collection of the Geological Survey at Vienna are a few 
fragments, including the holotype. The Kupstem Collection in the British Museum 
does not contain a single fragment, unless it be the originals of C. Meyeri, a sup- 
position which would of course make C. fustis a synonym of C. Meyeri. Lausr’s 
holotype is much rolled, also bored, so that the «facies glabra» may be accidental. 
Further the surface is not quite «undique glabra», since towards the collerette it 
shows more signs of longitudinal ribbing even than indicated in Lausr’s fig. 4a. 
Neither should the radiole be described as cylindrical, since it is somewhat bilaterally 
compressed, having in the proximal half four flattened faces, two on the back and 
two on the front. At the distal end is a great excavation towards one side, and 
this suggests that there was a large axial canal. The same feature is shown in 
QUENSTEDT’S figures. 
The general shape, the small base, and the longitudinal ribbing of the holotype, 
remind one of the specimen hereinafter described as C. Meyeri; but all Lause's 
