THE BEACHIOPODA. 39 



Localities. Bradford Abbas (Dorset), rare, and near Gorton 

 (Somerset), very rare. Zone of Murchisonae. 



38. KHYNCHONELLA SUBDECOEATA, Davidson. 



1854. RHYNCHONELLA SUBDECOEATA, Davidson, British Fossil 

 Brach. Paleeont. Soc., Appendix, plate A, 

 figs. 24 and 26. (Specimens to agree 

 with figures 23 and 25 have not been 

 found in this district.) 



Under Rhynch. subrinqens I have given the relations and 

 varieties of this species, and have also described it. It occurs 

 in the same zone as that species, viz., that of Murchisonae, and 

 though rather more frequent near Gorton, it is very rare at 

 Bradford Abbas. 



Localities. Bradford Abbas (Dorset), near Gorton (Somerset), 

 also near Cheltenham (Gloucestershire). 



39. EHYNCHONELLA PARVULA, E. Desl. 



1877. EHYNCHONELLA PARVTJLA, Davidson, "Proceedings Dorset 



Club," Vol. L, plate iv., fig. 14. 



1878. ,, PARVULA, Davidson, British Brach. Palseont. 



Soc., Supplement, plate xxvii., fig. 21. 



A small but peculiar flat species, which occurs in the zone of 

 Parkinsoni. It is chiefly distinct on account of its small number 

 of ribs ; on the mesial fold it has generally three ribs, but some- 

 times four. There are also specimens, probably varieties of 

 this species, which occur with it, that have only two ribs rather 

 more raised than in Rhynch. parvula. 



Dimensions. Length, 6 ; breadth, 6 ; depth, 3 lines. 



Localities. Bradford Abbas, and near Halfway House 

 (Dorset]. 



