94 
Triassic Echinodertns of Bakony. 
pores to the adradial margin, and in the absence of a ridge or granule between 
the two pores of a pair; it resembles T. subsimilis, but differs from T. persimilis, 
in the adoral position of the inner pore. Since T. persimilis is the only Cidarid 
from Bakony that has the ambulacrum preserved in association vvith interambula- 
crals, the present fragment may have belonged to any of the other species from 
the same locality, namely Cserhät. Unfortunately those species are represented only 
by the fevv isolated interambulacrals described, without specific name, as Miocidaris 
a and ß, and bv the single obscure plate doubtfully referred to Plegiocidaris. Specimens 
of Plegiocidaris Cornaliae and P. Curioni from the Kössen beds of Eiseier near 
Hindelang (Pal. Mus München, and Brit. Mus. E4727, E4728, E4695) have a decided 
elevation between the pores of a pore-pair, and their main tubercles are closer 
together. The latter feature is also found in P. Ombonii (Stoppani, Pal. Lombard, 
III, pl. XIX, f. 6 . The Triassic species of Miocidaris were all described from 
interambulacrals, and I have never seen any with ambulacrals. Broili (1903, p. 153) 
has doubtfully referred to Cidaris subcoronata, which may be a Miocidaris , a 
fragmentary ambulacrum from the Pachycardientuf, with «unyoked pores and in the 
middle a double series of small tubercles». Thus the only evidence available does 
not contradict the reference of the present ambulacrum to Miocidaris. 
Anaulocidaris. 
1879. Anaulocidaris K. A. Zittel, «Handb. d. Palaeont., Palaeozool.», I, p. 486. 
Since all the previous literature relating to this genus deals only with the 
radioles, the complete list of references will be given later, in the section on the 
radioles from Bakony (p. 138). 
D i a g n o s i s. — A Cidarid with the adradial margin of the interambulacrum 
bevelled on the inner surface, but not denticulate. Interambulacral plates thin; main 
tubercles small, perforate, noncrenelate, and without parapet, basal terrace, or definite 
scrobicule; no scrobicular tubercles, but an extra-scrobicular Ornament of scattered 
miliaries or minute tubercles, which (in the genotype at any rate) spring from the plate 
as slight (? obsolescent) ridges radiating from the main tubercle. Main radioles change 
from remiform to spatuliform, trulliform, and paletiform, as they pass from the adoral 
surface to the apical pole; the paletiform and trulliform radioles meet by the bevelled 
edges of their blades so as to form a continuous awning over the supra-ambital 
region of the test. 
Genotype. — Anaulocidaris Buchi (Münster, sub Cidaris ), Cassian beds of 
St. Cassian. The only Bakony species is: 
Anaulocidaris testudo 1 n. sp. 
Interambulacrals only. (Plate VII, figs. 164—187.) 
Diagnosis. — See p. 140. Since plates of the test are known in this 
species alone, the diagnoses of both this and A. Buchi have to be based on the 
radioles, with which we are not concerned at present. 
1 The awning of radioles resembles the «testudo», which Roman legionaries formed with their 
shields when attacking a walled town. 
