Crinoidea, Pentacrininae. 
31 
P. propinquus. The specimen represented in Münster’s fig. 8c. is in the Palaeonto- 
logical Museum, Munich, and is certainly an epizygal of that species The other 
figured specimen is not forthcoming. 
Pentacrinus Fuchsii Laube, 1865, Denkschr. Akad. Wiss. Wien. Math-Nat. 
CI., XXIV, Abth. 2, p. 276, pl. VIII a, fig. 18. The type-material consists of five 
stem-fragments in the Geologische Reichsanstalt, Vienna, where I have examined 
them. They are from the proximal part of the stem of Isocrinus propinquus 
Pentacrinus propinquus Münster, 1841, Beitr. z. Petrefactenk., IV, p. 49, 
pl. IV, fig. 9 a — c. The type-material is in the Palaeontological Museum, Munich, 
but one cannot decide which are the actual figured specimens. With its Synonyms 
P. Brauni and P. Fuchsi, this species is found in the Cassian beds. I have ex¬ 
amined specimens from other horizons referred to it by Wöhrmann, Broili and 
others, but believe none of them to belong to Isocrinus propinquus (vide infra, 
p. 54). The species has not been found in the Balaton district. 
Pentacrinus tyrolensis Laube, 1865, Denkschr. Akad. Wiss. Wien. Math.-Nat. 
CI., XXIV, Abth. 2, p. 277, pl. VIII a, fig. 20. The figured specimen and five other 
stem-fragments constituting the type-material are preserved in the Geologische Reichs¬ 
anstalt, Vienna, where I have examined them The only diagnostic character men- 
tioned by Laube, is the strongly crenelate suture-line, which, however, does not, as 
he supposes, distinguish this form from all other species of Isocrinus. Laube’s 
figures bear enough resemblance to one of these specimens to enable it to be re- 
cognised, but are useless as illustrations of the species; fig. 20 b, for instance, must 
have been drawn from some other fossil, since the only joint-faces exposed on any of 
the specimens are syzygial. None the less the specimen identified does represent a 
distinct species found in the Cassian beds. A fragment of limestone from the Raibler 
beds of Ueberschall, Haller Anger, contains columnals referred to this species by 
Wöhrmann (1889, Jahrb. Geol. Reichsanst. Wien, XXXIX, p. 192, pl. V, fig. 10). 
It is preserved in the Palaeontological Museum, Munich, where also is a similar but 
better fragment from Erlsattel near Zirl. A portion of the latter is now in the British 
Museum, registered E 7108. Neither of these fragments, however, contains anything 
that can properly be referred to Isocrinus tyrolensis. The Balaton district, on the 
other hand, has yielded several columnals which resemble Laube’s specimens in 
many points. It is therefore necessary to precede their description by a redescription 
of the true Isocrinus tyrolensis from the original material, the specimen figured by 
Laube and here refigured (Pl. II, figs. 37, 38) being taken as lectotype. 
Diagnosis of Isocrinus tyrolensis (Laube). — Transverse section quinque- 
lobate. Height of internodals about one-fourth to one-third their diameter; or diameter 
taken as 100, height is from 22 to 37. Side-faces markedly convex at interradii, straight 
or slightly concave at radii. Surface smooth, except for occasional slight extensions 
of the intercrenellar grooves. Nodals not swollen. Suture-line crenelate all round. 
Internodals number 5—7. 
Joint-faces. — Normal: lumen minute ; petals regularly crenelate, with about 7 
strongly marked peripheral crenellae to each; no radial space. Syzygial: depressed 
central area, stellate with radial extensions ; floors concave in epizygal, convex in 
hypozygal; no trace of adradial crenellae. peripheral similar to normal but obscured 
and subconfluent; slight radial triangle, depressed. 
Cirrus-facet confined to epizygal, deeply embedded in its distal half, facing 
