Echinoid Radioles, Cidaris fustis. 185 
specimens of C. fustis are thicker in proportion, and their axial canal appears to 
have been bigger. 
QuenstEpT has pointed out the distinctions from the somewhat similar C. Bronni 
KuipstT. 
Hesse (1900, p. 230) places C. fustis next after C. dorsata. Some specimens 
of the latter do in fact resemble C. fustis in the shape of the shaft and apparently 
in the loose structure, if not entire absence, of the axial complex; it would be 
hard to distinguish rolled radioles of this form from C. fustis, except by the smaller 
base of the latter, and this again might be an individual abnormality. 
Though I cannot rid myself of the suspicion that the radioles assigned to 
C. fustis may belong, some of them, to C. Meyeri, which is itself insecurely 
established, and the rest to (. dorsata, still for the sake of convenience | retain 
the name for those few cucumber-shaped radioles with small bases, which cannot 
be referred elsewhere with certainty. 
Material from Bakony. — From the Cassian bed e4 at Section VI, 
Veszprém, comes the proximal portion of a radiole, 4°7 mm. long, sub-cylindrical 
at its distal end with a diameter circa 1°4 mm., and swollen proximally to a diameter 
2°2 mm., while the collar has a mean diameter of O°6 mm. 
From the Raiblian of Jeruzsalemhegy there are four obscure radioles, of which 
at least one is reminiscent of the holotype, even in accidental features (Pl. XII, 
figs. 340, 341); it is 21°3 mm, long, with diameters at the widest part 6 mm. and 
72 mm.; the base is broken off at the collerette, where the diameters are 2 mm. 
and 0°95 mm. 
A subcylindrical radiole, slightly crushed along the middle line, from the 
Pachycardientuffe of the Tschapit-bach, has been doubtfully referred to this species 
by Brom (1904, pl. xvii, f. 55), so that the record from the Raiblian is not altog- 
ether new. 
«Cidaris» decorata. 
(Plate XII, fig. 342, and Plate XV, fig. 442.) 
1841. Cidaris decorata Munster, Beitr. z. Petrefactenk. IV, p. 45, pl. iii, f. 22 a, b,c. 
1865. Cidaris decorata Munster, G. C. LauBr, Denkschr. Akad. Wiss. Wien, Math.-Naturw. Cl. XXIV, 
Abth. 2, p. 290, pl. x, f. 5a, b, e (not c, d, f.). 
1900. Cidaris decorata Mtwnsrer, E. Hesse, Neues Jahrb. f. Min., Beil.-Bd. XII, p. 227. 
1904. Cidaris decorata MUxster, F. Brorti, Palaeontographica, L, p. 155, pl. xvii, ff. 30—36. 
Diagnosis. — A Cidaroid of which the primary radioles have a micro- 
structure of normal Cidaris type; shape elongate sub-claviform, pointed distally, 
often somewhat dorso-ventrally compressed; ornament of sharply raised rounded 
ribs, some running the whole length of the shaft, others between them shorter, 
both ribs and intervals with a fine granular longitudinal striation; acetabulum 
coarsely crenelate; annulus finely crenelate or smooth; collerette tapering from 
annulus to base of shaft, granulo-striate. ; 
Notes on Cassian specimens. — In a shaft from the Kupsreiw 
Collection in the British Museum, with greatest diameter 7°2 mm., are 25 ribs, of 
which eleven reach the distal end, or, more precisely, come within 1 mm. of the 
extremity. The longitudinal striae between them are about 28 to the millimetre, 
