THE BRACHIOPODA. 43 



Localities. — In the zone of Murchisonse, rare, Drimpton, and 

 near Sherborne (Dorset), Haselbury, and near Gorton (Som- 

 erset). In the zone of Opalinum, common. Stoke Knap (Dorset), 

 near Haselbury (Somerset). It also occurs at Seavington (Som- 

 erset), Minchinhampton, Dinnington, in Yorkshire, &c. At 

 Bourmont, and in the departments of Arcyron and Deux Sevres 

 (France). Dr. Oppel says it has not been found in South-West 

 Germany, although its zone is found at many places. 



Ohs. — Mr. Davidson with great kindness sent me his type 

 specimen of Rhynch. Stephensi for examination, and I have been 

 able to convince myself by comparing it with a quantity of the 

 young of Rhyncli. cynocephala that it is merely the young of this 

 species. The yoimg of Rhynch. cynoccphala, like the young of 

 Rhynch. ring ens are flat, and the mesial fold is depressed, and 

 it increases in height more than the shell grows in size. 



44. — Khynchonella angulata, Sowerhy. 



1851. Ehynchonella angtjlata, Davidson, British Brachiopoda, 

 Palseont. Soc, plate xviii., fig. 13. 



This species is rather rare in this district. It is broad, with a 

 slightly raised mesial fold, on which are 5 or 6 ribs. The base 

 is, as it were, flattened. This species occurs in the Sowerbyi 

 zone of Bradford Abbas, and a slight variation of it occurs in 

 the Sowerbyi zone near Gorton (Somerset). 



Dimensions. — Length, 7 ; breadth, 8 ; depth 5 lines. 



Localities. — Bradford Abbas (Dorset), and near Gorton (Som- 

 erset), also near Cheltenham (Gloucestershire). 



45. — Ehynchonella dundeiensis, 8. S. Buchnan. 



1854. Ehynchonella ? Davidson, British Fossil Brachiopoda, 

 Palsoont. Soc. Appendix, plate A, fig. 28. 



This species is somewhat triangular in shape, smaller valve 



