Echinoid Radioles , Anaulocidavis. 
159 
(RAW) In the Geologische Reichsanstalt, Wien. 
b) 
Text-fig. 39. 
Greatest length.21 '4 
Greatest width.18'7 
Thickness of blade over all . . 2'1 
» » » in median line 1'7 
Width of annulus.4'3 
Thickness of annulus.2'9 
Original of Laube (1865), pl. X, f. 2a. The ridges are well marked, and there 
is a slight thickening of the margin. 
Actual length.20'5 
Actual width.20'6 
Thickness across ridge (x — y). . 3'1 
Thickness in median line . . 2'1 
Width of annulus ...... 4'6 
Thickness of annulus .... 2 7 
Original of Laube (1865), pl. X, f. 2 d. 
/ s Actual length. . 7'6 
d t'5 thick Greatest width.6'4 
Annulus not preserved. 
Text-fig. 41. 
Original of Laube (1866), pl. X, f. 2 c. Probably from a young individual. 
(HMW) In the Hof-Museum, Wien. 
Actual length.17'6 
Actual width.14'9 
Thickness across ridge (x—y). . 2'2 
Thickness across a—b .... 2'4 
Thickness in median line . . 2'1 
Width of annulus.3'3 
Thickness of annulus. ... 2'6 
Numbered «D. 57». St. Cassian, zone of Trachyceras Aon. 
Greatest length.23'1 
Greatest width . 16'9 
Thickness across ridge (x — y) . . 2 0 
Thickness of blade over all . 2'2 
Thickness in median line . .1*8 
Width of annulus.3'7 
Thickness of annulus.2'5 
From the Stuores Mergel, St. Cassian. Slightly asymmetrical and excavate at 
the distal end. 
