90 = Triassic Echinoderms of Bakony. 
disposition all round, then there would have been from 20 to 24 imperforate tubercles, 
alternating with small miliaries. So much of each of the other scrobicular rings as is 
preserved is composed of similar tubercles interspersed with similar miliaries. The 
diameter of the scrobicule may be estimated as at least 3.4 mm. 
Relations of the Specimen. — Without the evidence of the adambulacral 
margin, and considering the apparently close union of the two interambulacral 
fragments, One cannot say certainly that the specimen belongs to Mitocidaris. Still 
it would be more unsafe to refer it to Plegiocidaris. The fragment is perhaps 
more like to MW. Cassiani than to any of the species from Bakony, but the scrobicule 
appears less sunk, the platform is not so'much wider than the mamelon, the scrob- 
icular tubercles are relatively smaller, and the sutural union probably closer. 
Miocidaris verrucosus' n. sp. 
(Plate VI. figs. 153—156.) 
Diagnosis. — A Miocidaris in which the interambulacrals are about twice 
as wide as high, with scrobicules contiguous or confluent, but very little or not at 
all compressed, very slightly sunk, and without distinct scrobicular tubercles; with 
platform of main tubercle twice as wide as mamelon, and with 12—14 crenellae; 
with extra-scrobicular surface irregularly crowded with distinctly mamelonate, imper- 
forate tubercles (about 3'/, to the square millimetre), interspersed with a few 
smaller tubercles and miliaries; with 4—5 strong denticles on the adradial margin 
of each plate. Test flattened on adoral surface. 
Material. — (a) Holotype, a fragment consisting of portions of 4 interambul- 
acrals from Quarry near Cutting I on Veszprém-Jutas Railroad. (b) A portion of an 
interambulacrum, lying in matrix, and consisting of two almost complete inter- 
ambulacrals and the central portion of a third, from Jeruzsalemhegy. Both are from 
the Raiblian beds. 
Description of Specimens. — The holotype seems to come from the 
adoral end of an interambulacrum. The peristomial border is preserved, as also the 
adradial, but the others are imperfect, especially at the adambital end of the fragment. 
The tubercle at the adoral end is small; that next it a little larger; the third and 
fourth larger still and of about equal size, so that they may be regarded as normal 
representatives. The angle which the adradial margin forms with the peristomial 
border is 135°. 
The main tubercles are relatively prominent. Their perforate mamelons are 
depressed hemispheroidal, with long neck slightly undercut, and their diameter is 
half that of the platform, which has 12—14 crenellae. The diameter of the mamelon 
in the third and fourth plates of a is 0.5 mm., in b is 0.7 mm., the respective 
platforms being 1 mm. and 1.4 mm. In a the crenellae are rather obscure. The 
slopes of the boss are straight and rather steep in a; but in b, where the boss is 
relatively lower, they are concave and soon merge in the floor of the scrobicule. 
In a the scrobicules are confluent but not much compressed, both transverse and 
meridional diameter of that on the third plate being about 2.1 mm. In 3D the 
scrobicules, though contiguous, are separated by a single line of tubercles, which 
diminish in size rapidly and almost disappear half-way across the scrobicule. Since 
1 Warty, in reference to the abundant ornament. 
