40 



Geologists f and one of these specimens I have been so fortunate 

 to find is the largest of the series. It is ten lines long and seven 

 broad, in which it differs from Terelratula coarctata, which is 

 usually as broad as it is long. 



The Terelratula coarctata is remarkable for presenting both 

 longitudinal and transverse lines ; whilst Terelratula Morierei has 

 transverse lines with only a slight indication of longitudinal 

 striae. 



These fossils occur in a thin band of marl, which separates the 

 ammonite bed from the upper freestone ; and in getting the 

 stone this is thrown aside in spoil heaps, and the Terelratula in 

 question, with several other delicate fossils, are exposed ; and, 

 therefore, it is not improbable that a careful search will enable 

 us to find fresh specimens. At the same time it can only at 

 present be considered as very raref 



The following figures will well illustrate the forms of the 

 Terelratula Mortirei and Terelratula coarctata.* The former being 

 now figured as British for the first time. 



a. 



- I. c. d. 



Terelratula Moritrei natural size ; a, Dorsal view ; I, side ; 

 c, ventral ditto ; d, an enlarged portion showing the lines and 

 dotted markings. 



a. o* v. u. 



fSince the above paper was read three or four other specimens have been 

 found in the Bradford Abbas quarry. EDITOX 



* Our drawings are from a specimen in the cabinet of Professor Buckman, 

 presented by its finder, A. Kent, Esq. EDITOB. 



