Echinoid Radioles, Anaulocidaris. _ : 163 
m) Actuaipiengihy arr 4s tts 2756 
Greatestnwidthr-1) 7). = . 9. (110 
Thickness across ridge (x—y). . 20 
Thickness of blade over all . . 1°9 
Text-fig. 53. Thickness in median line . . . 12 
Annulus not preserved. 
Numbered <D. 57». St. Cassian, zone of Trachyceras Aon. The small size 
and the shape show that this is almost in the paletiform stage. 
(BM) In the British Museum. 
ip WOM Caf ew os, SOO) 
WUsTe leh eS a ee MIG NO) 
Thickness along z—y ... . 20 
Distances —jmarwece See 420 
Thickness over all at d . yO 
Thickness in median line atd . 18 
‘Sihicknesspat 6. 2. = 2 5 4 = oO 
Width of collerette . . . . . 3:1 
Thickness of collerette . . . . 18 
Annulus broken off. 
Registered E 9353. St. Cassian, KuipsTrin Collection. 
g) enpth Gj, iw ay tts fy Or 
Whicthig—Pe ie foe ee IEG, 
Pie aati Ses Thickness along BN) BN Fy oe mali 
ogee f Distancend — jaar a -o r Oto 
ae of Thickness over all atd. . . . 17 
+ Thickness in median line at d . 1°5 
Text-fig. 55. Widthofmannulus’ .) ge «0 = 2c 
ibhicknesswofsannuluss, caren 159 
Registered E 9354. St. Cassian, Kuipstem Collection. 
h) Genothwc——jak Wintec oe Beet pe LO 
zi ot Width ON deine sah kad ay ce 2070) 
a s----€ Thickness along x—y . . . . 16 
y\i..d Distance (i eee ee Rees ety ee poy, 
A ibhickness over all at dad. - 6 4 (271 
Thickness in median line atd . 16 
Text-fig. 56. Widtheotranmilusy. .., janie <i) aoe 
‘hicknessvof annuluss .., is f+ s 210 
. 
Registered E 9355. St. Cassian, Kuipstetn Collection. 
It is in the Radioli trulliformes that the distinctness of the two species is 
most manifest. 
As usual A. Buchi attains a greater size. In it the ratio of width to length 
has only once been found as high as 181:100, namely in BM,k, whereas in 
11% 
