THE BRACHIOPODA. 21 



is really Tereb. simplex. This species occurs in the Murchisonee 

 zone, and is rather scarce. 



Localities. Bradford Abbas and Marston Road (Dorset) ; also 

 near Cheltenham (Gloucestershire). 



14. TEREBRATULA (EPITHYRIS) CURVIFRONS, Oppel. 



1856. TEREBRATULA CURVTFRONS, Oppel, Juraformation, page 

 423, No. 212. 



1872. ,, (Ep.) CURVIFRONS, E. Desl, Brach. Jurass., 



plate 49. 



1878. WALDHEIMIA CURVIFRON.S, Davidson, British Brach. 

 Palseont. Soc. Sup., plate xxiv., figure 33 

 (corrected in text to Terebratula.} 



The shell that I place under this designation is the one figured 

 by Mr. E. Deslongschamps and Mr. Davidson in the references 

 quoted above, and which is found here in the Murchisonsezone, and 

 in the same zone in Gloucestershire and Normandy. Dr. Oppel's 

 description, however, scarcely seems to point to the shell figured 

 by E. Deslongschamps. He says that his species comes between 

 ler. carinata and Ter. resupinata, has a broader sinus than the 

 last, and comes from the base of the Parkinsoni zone.* I have 

 not had opportunity to work it out, and so leave it, merely 

 pointing to this description. It evidently wanto some investiga- 

 tion. 



Mr. E. Deslongschamps places this species and also Ter. pro- 

 vincialis into the subgenus Epithyris. Several subgenera are well 

 illustrated in the beginning of his work. Epithyris seems to 

 have a shorter and different loop to Terebratula, and also two 

 dark lines on the smaller valve, which commencing at the beak 

 and diverging slightly run to somewhat more than half- way down 

 the shell. I have specimens of the species illustrating this. 



Ter el. curvifrons varies slightly, but not to any great extent. 

 It is most like large Wold, carinata with a deeper sinus. 



Dimensions. Length 19, breadth 18, depth 9 lines. 



* Dr. Oppel Juraformation, page 423, No. 212. 



