198 Triassic Echinoderms of Bakony. 
ridge; some show traces of a lumen, others certainly do not, a difference that may 
depend partly on weathering, partly on the region of the shaft from which each 
fragment comes. Ten specimens again are rather stouter, more or less cylindrical, 
with greatest diameters from 2°! to 2°8 mm., with more numerous pustules, not 
very thorn-like; in other respects like the preceding lot. The length of the larger 
among these might be roughly estimated at 25 mm. The next half-dozen specimens 
appear to be generally similar in character, but have more and smaller pustules, 
sometimes tending to be grouped in oblique or transverse rows (PI. XII, fig. 352). 
One of these is a complete radiole, probably from the circum-apical region; it is 
10 mm. long, very slightly flattened, and increases from a diameter of 1°9 at the 
proximal end of the shaft to one of 3°3 mm., at 1°6 mm. from the distal end, 
where it terminates in an obtuse, slightly rounded, pustulate point; the fine 
pustules are arranged in oblique rows, usually from left proximal to right 
distal, but occasionally so regular as to produce other oblique rows crossing them. 
In three other almost complete radioles from Cserhat, of the same form as _ that 
Jast described, the pustules are much coarser, and their arrangement in transverse 
rows so marked, at least on the adapical face, that the shafts resemble those found 
in some forms of C. Roemeri (Pl. XII, fig. 355). If there were other reason to believe 
in the occurrence of that species in Bakony, the question would arise whether these 
radioles should not be referred to it; but as things are, it seems preferable to regard 
them as probably supra-ambital or circumapical radioles of C. Wissmanni or perhaps 
C. Waechteri. 
There are 9 other specimens from Cserhat, of rather thin, usually cylindrical 
form, differing from most of the normal radioles above described only in the occur- 
rence of a rather coarse longitudinal striation, or fine ribbing, sometimes breaking 
up into granules, and frequently accompanied by an elongation of the pustules in 
the same direction (Pl. XII, figs. 357, 358). It is hard to say whether this is a 
rugose ornament or a weathering out of the stereom structure; in either case it is 
of no great systematic importance. This rugose surface is well seen in a fragment 
of shaft from Giricses-domb, which in other respects closely resembles the normal 
specimens from that hill. 
From the same locality, Giricses-domb, comes a curiously curved thin fragment 
of shaft, 7°77 mm. long, about 0°8 mm. thick, excluding the pustules, which are 
small, thornlike, quite irregular, and number only 10 on the whole fragment, 
In none of these specimens is the base really well preserved. The acetabular 
margin still show traces of crenelation in some cases, but the finer crenelation of 
the annulus is in no case to be detected (PI. XII, fig. 356). 
This completes the account of those radioles from Bakony to which the name 
C. Wissmanni may as a rule be applied without further qualification. They do not 
differ from the St. Cassian radioles of that species in any marked character except 
that of size, those of St. Cassian being as a rule much larger. 
We pass now to a number of radioles that seem closely related to C. Wiss- 
manni, or possibly to C. Waechteri, but at the same time constitute a fairly homo- 
geneous and independent group. They most nearly resemble those stouter cylindrical 
radioles from Cserhat with the less thornlike pustules, which have just been described 
under C. Wissmanni; and for this reason it may be as well to describe them for 
the present as — 
