160 Triassic Echin 
f) Greatest length . 
Greatest width . 
oderms of Bakony. 
pallies! 
. 10°2 
Thickness across ridge (v—y). . 1°2 
Thickness of blade over all . . 1°3 
T Thickness in median line . . . 1°1 
Text-fig. 44. Width of annulus . : 2°8 
Dhickness of annulus. 2.) 4 7) aed. 
From the Stuores Mergel, St. Cassian, ex Coll. Kurpstew. 
The specimen is slightly crushed. 
g) Greatest length eer - 62 
Greatest, widthitaiony-aenl aie aes 
Thickness across ridge (v—y). . 1°2 
Thickness of blade over all . . 1°5 
Text-fig. 45. Thickness in median line . . . I'l 
Width on annclusys en semen eee 
Thickness of annulus. Ponce be 
From the Stuores Mergel, St. Cassian, ex Coll. Kurtpstemn. 
h) Actual lenethy © 2) 5s woes renee 
Actuallswidthn 9 sass a eae es el rs 
Thickness across ridge (v—y). . 3°0 
Thickness of blade over all . . 3°2 
er, Thickness in median line . . . 2°5 
Text-fig. 46. Width of annulus; <9. 2) 455 
Thickness of annulus . .. .#d/ 
From Heiligen-Kreuz, Enneberg. 
D ActualMleno this cascade 78 
Nctuialeawitithi amen eee eee 
Thickness across ridge (y—y). . 16 
2 Thickness of blade over all . . 1°8 
Text-fig. 47. Thickness in median line ._. . 1°45 
Annulus not preserved. 
From Heiligen-Kreuz, Enneberg. The outer face of the blade is longitud- 
inally striated in the proximal region only. The pits between the striae are intens- 
ified, the striae seeming to anastomose; and in the distal region the anastomoses 
break up into irregular granules or small pustules. 
