COMMUNICATIONS 
TO THE 
MONTHLY MEETINGS 
OF THE 
YORKS HIEE PHILOSOPHICAL SOCIETY. 
1887. 
ON THE OCCURRENCE OF TEREBRATULA 
GESJSTERI IN YORKSHIRE. 
Two specimens of Terebratula (one of whicb is figured PL I. 
figs. 17—19) belonging to the Malton Museum were sent to me 
for determination. As I thought that they were new to York¬ 
shire I obtained the kind permission of Mr. S. Chadwick (the 
honorary cm*ator) to bring them before this society. In the year 
187b a paper by Mr. Hudleston and myself was read before 
this society “ On the distribution of the Brachiopoda in the 
Oolitic strata of Yorkshire.’’ Since then the T. hullata has been 
shown to be a Waldheimia, and I found in the Leckenby col¬ 
lection in the Woodwardian Museum, Cambridge, a specimen 
which I determined as Terebratula Bolonieiisis from the coral rag 
near Malton. The specimens now before the society I find 
belong to the species Terebratula Gesneri. This species has been 
found in the coral rag of Bullingdon and Horsepath, near 
Oxford, where it is rare and occurs along with Terebratula 
Boloniensis. Mr. Davidson states in his supplement to the 
British Oolitic Brachiopoda that he refers the Oxford specimens 
with some uncertainty to Terebratula Gesneri of Etalon. Both 
these species occur rarely on the Continent in the Middle 
Portlandian beds, which is a much higher horizon than the coral 
rag. The Continental geologists consider the Portlandian and 
Kimnieridgian formations to be closely allied, and some of the 
