192 
Triassic Echinoderms ot Bakony. 
1865. Cidaris Braunii Desor, G. C. Laube: Denkschr. Akad. Wiss. Wien, Math.-Naturwiss. CI. XXIV, 
Abth. 2, p. 293, pl. x, f. 6 a—d (non f. 6 e, /). (Includes C. catenifera Münst., C. baculi- 
fera Münst., C. Waechteri Wissm., C. similis Desor). 
1875. Cidaris Waechteri Wissm. in Münst., F. A. Quenstedt : Petrefactenk. Deutschlands, III, p. 205, 
pl. lxviii, f. 131. 
1900. Cidaris Braunii Desor, E. K. Hesse : N. Jahrb. f. Min., Beil.-Bd. XIII, p. 229. 
1904. Cidaris Brauni Desor, F. Broili : Palaeontographica, L, p. 155, pl. xvii, f. 27—29. (Corres- 
ponds tö both C. tVaechteri and C. similis, but seems a slight mutation from the Cassian 
type. Vide supra sub C. similis). 
D i a g n o s i s. — A Cidaroid in which the primary radioles have a micro- 
structure of coarse meshes, dominated by a radiate arrangement, merging adcentrally 
into an irregulär axial complex and a variable, ill-defined lumen, and centrifugally 
into a finer and more regulär meshwork with dichotomous radiate septa; in which 
normal peripheral radioles are straight-sided, tapering to base, dorso-ventrally com- 
pressed, rounded distally, bearing unequal pustules in irregulär longitudinal rows, 
more developed on supposed adapical face, frequently forming serrate margins, and 
usually reduced to granules on supposed adoral face; collerette distinct, short, 
linely striate; annulus, rounded, prominent, finely crenelate; aeetabular margin 
prominent, smooth or slightly crenelate. Adapically the radioles tend to be more 
clavate, less compressed, and less spinulose. 
The Holotype has not been definitely fixed ; so the original of Wissmann’s 
f. 22 (1841) is hereby selected. 
The holotype of the synonym Cidaris Brauni is the broken radiole figured 
bv Münster (1841, pl. iii, f. 23) as C. catenifera Ag. 
Discussion of the St. Cassian specimens. — So far as outward 
form is concerned, the difference between the two holotypes is almost entirely one 
of size. The difterences that can be gathered from the original descriptions of 
Wissmann and Münster are : C. Waechteri, dorso-ventrally compressed, with projecting 
serrate margin, aeetabular margin smooth; C. catenifera (i. e Brauni ) clavate, 
thickest in middle, aeetabular margin slightly crenelate. Not much weight can be 
attached to the last character, which is easily affected by the state of preservation 
and is often found in normal examples of C. Waechteri. It should also be noted 
that the annulus is crenelate when well preserved, not smooth as stated in the 
original descriptions. The other differences are consistent with a different position 
on the test, C. Brauni being presumably the more adapical. This is confirmed by 
Münster’s Statement that the rounded distal end of his C. catenifera bears two 
small circlets of pustules. This precise feature is doubtless an individual character, 
of the specimen itself shows that it has nothing to do with that supposed species, which I now regard 
as a form of C. dlata, but that it most closely resembles several small radioles of C. Roemeri Wissm. 
em. Quenst, (excl. C. complanata). It is the slight ribbing of the adoral face that produces a resem- 
blance to C. semicostata, but there are no lateral vanes, and the strong V-shaped ridges of the adapical 
face are characteristic of C. Roemeri. C. subspinulosa, then, is most probably a synonym of 
C. Roemeri. 
Specimen E 4603 (Klipstein’s f. 10 d, e), which was referred by L'URE (1865, p. 287) to 
C. Roemeri, is much more like a small radiole of C. Waechteri, but might possibly belong to 
C. IVissmanni. 
Specimen E 4604 (Klipstein’s f. 10 /) was also referred to C. Roemeri by Laube (loc. citü, 
but it is probably the distal end of a rather abnormal C. Wissmanni. 
