49 
Terebratulina substriata —Engel, 1883. 
Geognostische Wegweiser durch 
Wurttemberg, page 204, tab. 5. 
fig. 19. 
Terebratulina substriata var. Suffieldensis —J. F. Walker, 
1892. Geological Magazine, page 
364. 
History . — Schlotheim states that Terebratulites substriata$ 
is covered with very fine radiating striae, and that it occurs at 
Schafloch near Amberg: he gives no figures. 
Zieten gives the upper beds of Oolite Limestone near 
Gruibingen as the locality for his Terebratula striatula ; the 
specimen figured appears to be Terebratulina substriata var. alba. 
von Buch gives a long description of Terebratula substriata, 
in which he states that it is, with the exception of the beak, 
almost round, and it is covered with fine plaits, and he notices 
the absence of the ear-like projections of the smaller valve. 
Davidson refers this shell to the genus Terebratulina, but he 
gives a figure of Terebratula substriata var. silicea. 
Quenstedt, in 1858, Der Jura”) divides this species into 
Terebratula substriata alba from the Weiss Jura gamma, and 
Terebratula substriata silicea from the Weiss Jura epsilon of 
Nattheim. 
Suess, in 1858, separates the Terebratulina which occurs 
pi the Weiss Jura gamma from Terebratulina substriata, 
Schlotheim, and gives it the name of Terebratulina Quenstedti, 
and reserves the name Terebratulina substriata for Nattheim 
specimens from the Weiss Jura epsilon. 
Quenstedt (“ Die Brachiopoden”) remarks that Schlotheim's 
specimens from Amberg are’nearer to Terebratulina substriata alba 
than to Terebratulina substriata silicea. 
De Loriol “ Monographic paleontologie de la zone a 
Ammonites tenuilobatus de Baden ” agrees with Quenstedt, 
and savs that it is Terebratulina substriata silicea which 
ought to have had another name, as it differs in shape; 
in strong widely separated ribs ; in its beak and larger 
size ; it is also more strongly folded. The specimen, 
plate xiii., fig. 33, figured by De Loriol, appears to agree very 
closely with our Yorkshire specimens. He says that the striae 
