Cr in oidea, Pen tacrini dae. 
23 
section and with crenelate or radiately ridged joint-faces. The diameter of the largest 
cirrus-facet is 0‘3 mm. 
It is possible that to larger columns of the same species we should assign, 
as cirri, some slender fragments also from Cserhät These fragments, lettered a to f, 
are composed of elongate ossicles with small crenellae at the sutures. Some are 
slightly flattened. The average measurements in millimetres of the component 
ossicles are: 
a b c d e f 
Diameter 1'2 IT IT T05 0‘9 0'9 
Height 1-15 T5 T2 T46 T4 & TO 0‘9 
In a, b, d, and e, the sides of the ossicles are slightly concave; in c they 
are straight; in /, convex. In a and c, the sutures are very indistinct. In d there 
is a swelling half-way down each ossicle, suggesting that it consists of a fused 
pair; one of these swellings looks as though it were due to cirrus-facets, in which 
case the specimen would be a fragment of a small stem, not of a cirrus. 
There are two other fragments: one (g) a single ossicle, with diameter T9 mm. 
and height 3'3 mm. and convex sides; the other (h) composed t of three ossicles, 
with diameter T65 mm. and height 2'5 mm. and very slightly concave sides These 
may possibly be fragments of cirri of an allied but larger species than that to 
which a—f belong. 
Relations of the Species. — The various fragments under discussion are 
too incomplete and too obscure to bear the weight of an independent specific, still 
less of a generic, name. This is not the place in which to discuss the systematic 
Position of « Pentacrinus venustus», to which they appear allied. But I must express 
my conviction that, had Professor Laube troubled to examine Klipstein’s types (Brit. 
Mus. 75860 a and b) he could never have referred them to Pentacrinus [i. e. Balano- 
crinus\ laeuigatus Münster. As I hope to prove elsewhere, there is scarcely any 
point of resemblance, beyond the cylindrical shape and smooth exterior of the 
columnals. In fact neither « Pentacrinus venustus» nor the fragments herein described 
can be placed in the Pentacrininae as nowadays understood. They might belong 
to some otherwise undescribed species of Holocrinus. 
Subfamily : PENTACRININAE. 
Pentacrinitiae Bather, 1900, in «A Treatise on Zoology», ed. E. R. Lankester, vol. III, «The 
Echinoderma», p. 182. 
The genera included in this Subfamily are Pentacrinus Blumenbach (syn. Extra- 
crinus Austin), Isocrinus Meyer (syn. Pentacrinus P. H. Carpenter), Balanocrinus 
Agassiz em. Loriol, Austinocrinus Loriol, and Metacrinus P. H. Carpenter. The 
Pentacrinine columnals found in Triassic rocks have hitherto been referred to Penta¬ 
crinus. That genus, however, as properly restricted, hnds its earliest representative 
in P. versistellatus Schafhäutl, from the zone of Avicula contorta ; the type-specimens 
are in the Palaeontological Museum of Munich, where I have examined them. No 
species of that genus is known from the Balaton district. Some of the Triassic 
species, e. g. Pentacrinus subcrenatus and P. laevigatus, do not belong to Penta- 
