54 
Triassic Echinoderms of Bakony. 
distinctly that the internodals of I. propinquus are all equal in height; were this 
so, it would be another point of difference; but the fact is that the alternation in 
size is of precisely the same character as in I. Hercuniae. The apical angle of 
the radial triangle is always obtuse in I. Hercuniae, but in I. propmquus it is 
acute, as a rule, if not always. The secondary series of fine crenellae, so characteristic 
of the syzygial faces in I. Hercuniae, has not been observed in a single specimen 
of I. propinquus. The cirrus-facet of I. propinquus, in so far as it departs from 
an elliptical outline, approaches lenticular (PI. V, fig. 119), and the upper rim extends 
into the hypozygal, which often takes part in it. 
Some of the forms referred by various authors to I. propinquus, in my 
opinion wrongly, may resemble I. Hercuniae in a feature here and there; but there 
are many other points in which they differ. 
Thus, in the collection of the Geologische Reichsanstalt at Vienna, among 
Laube’s Originals of I. propinquus is a small stem-fragment (PI. V, fig. 118) which, 
to judge from its size and general outline, might be the original of Laube’s plate 
Villa, fig. 17b; the fact that its details are quite unlike the drawing is no proof to 
the contrary. It consists of 5 columnals, of which the fourth from the top is an 
epizygal. The points in which it differs from the normal I. propinquus and ap¬ 
proaches I. Hercuniae are these. The diameter being 3 mm. and the average height 
of the internodals 0'7 mm., the resulting relative height of the latter, 23:100, agrees 
with that of similarly sized columns of I. Hercuniae. The total number of crenellae 
in a petal, both adradial and peripheral, is only 7 or 8, fevver than in either I. pro¬ 
pinquus or I. Hercuniae. The radial triangle, though distinct, is very small The 
cirrus-facet does not extend over any part of the supranodal; its outline is not 
lenticular but four-sided, being flattened below, less so above, and with the ends 
curved, while the chords of the curves trend upwards and inwards, not downwards 
and inwards as in I. Hercuniae. One cirral is preserved; its distal joint-face has 
an inner rim below, as well as the outer one, cutting off a crescentic area. In the 
Position of the cirrus-facet, and of its fulcrum, and in the height of the nodal, 
1 mm., this specimen agrees with either I. propinqnus or I. Hercuniae. Clearly the 
specimen is not a normal I. propinquus; but on the evidence of this single fragment, 
it would not be safe to say that I. Hercuniae occurred at St. Cassian. 
The single stem-fragment from the Pachycardien Tuffe of the Seiser Alp in 
the Tyrol referred to I. propinquus by F. Broili* has been examined by me in 
the Palaeontological Museum, Munich, and found to present the following features. 
The suture-line is crenelate in the re-entrant angles. The height of the internodals 
is to the diameter as 10 to 100, that of internodals of I. propinquus of equal size 
being 13 or 14 to 100. The joint-face drawn is that of a hypozygal; it shows no 
radial groove, but a very long radial triangle separates the adradial crenellae. The 
specimen therefore, while differing from the true I. propinquus, does not approach 
I. Hercuniae. 
The specimens (PI. V, figs. 120—122) from the Cardita-Oolite of Rammelsbach 
near Seehaus, figured by S. von Wöhrmann** as Pentacrinus propinquus, and other 
specimens from the Raibl Beds of Naunspitze near Kufstein, also preserved under 
* Palaeoutographica, L, p. 151, pl. xvu, f. 8; Jan. 1904 (Author’s copy received June, 1903). 
** Jahrb. d. k. k. geol. Reiclisanst. Wien, xxxix, p. 191, pl. v, f. 9 ; 1889. 
