232 
Triassic Echinoderms of Bakony. 
Radiolus lineola var. minor. 
(Plate XIII, figs. 422- 429, and Plate XVIII, fig. 458.) 
Diagnosis. — Radiolus lineola with mean diameter of radioles about 
PI mm.; surface often carinate, muricate, or pustulate. 
Holotype, the original of Plate XIII, figs. 422—425, front the Raiblian of 
Quarry near Cutting I. 
Material front Bakony. — Jeruzsälenthegy, 11 fragments with base, 
showing distinct collerette; 6 with base, showing no collerette; 46 with base 
indistinct or absent; 15 fragments of bicarinate form. 
Veszprem-Jutas railroad, Cutting I, bed e, 1 radiole; horizon unrecorded, 
12 radioles of normal type and 1 muricate Quarry near Cutting I, 16 with bases, 
32 without, and 1 muricate Cutting IV, beds a — b, 1 fragment without base. 
All the preceding are Raiblian. 
Cassian beds of Cserhät (Leitnerhof), 32 of normal form, of which no less 
than 27 retain the base; also 12 muricate distally, with base preserved in 8. The 
contrast between the proportion of bases collected from these Cassian beds and 
tliat from the Raiblian is worth noting; it is not due to any better preservation of 
the radioles. 
Description of Specimens. — The normal form of var. minor resentbles 
var. major, but a larger proportion is compressed; and, in harmony with this, 
the proportion of the bicarinate form is also greater. 
The longest fragment with base is 12 mm. long; the largest without base, 
11 mm. ; neither preserves the distal end. Probably these radioles attained a 
length of 20 mm. on the average. A radiole with shaft of 0*95 mm. diameter is 
1'4 mm. thick at the annulus, and the height of the base to the top of the annulus 
is 0*9 mm. A shaft 1 mm. thick has an annulus of 1*3 mm., with height of base 
0*8 mm., and height of collerette 0'5 mm. A shaft 1*05 mm. thick has an annulus 
of 1 *75 mm., with height of base 1 mm. and of collerette, 0*6 mm. In a radiole 
of 1 mm. diameter, the diameter of the axial canal is 0*4 mm. ; and in one of 
0*95 mm. diameter, it is about 0*3 mm. Sometimes the relative width of the lumen 
seems to have been greater, but those specimens are usually so crushed that 
measurement is difficult. 
The muricate form is represented in the material from all the important local- 
ities except Jeruzsälemhegy. The fragment from Cutting I is beautifully preserved, 
and is 10*5 mm. long, but has no base; it tapers slightly towards one end, which 
is presumably distal; the thorns are about 4 to the square millimetre, and in no 
definite Order; each occupies about the width of two Striae or circa 0*06 mm. 
(PI. XIII, fig. 429), and has a distal rake. The fragment from the quarry near 
Cutting I is of the same character. 
The specimens from Cserhät are not so clear. In one the thorns are more 
prominent, and like saw-teeth; in another they are elongate so as to form little 
ridges. Were it not for the axial lumen and the striation of the shaft, one might 
well refer these specimens to C. Wissmanni; but that species, as we have seen, 
has a different micro-structure. There is a closer resemblance to various radioles 
