30 THE BRACHIOPODA. 



by its larger valve being mucli raised, moderately flat smaller 

 valve, and valves joined acutely. This species is rare in this 

 district. 



Localities.— Ne&r Half-'^ay House (Dorset) ; also near Chel- 

 tenham (Gloucestershire). 



28 — Waldheimia Waltoni, Davidson. 



1857. Terebratula Waltoni, Davidson, British Fossil Brach. 

 Palseontographical Soc, plate v., figs 1 

 2, 3, and Supplement plate xxiii., fig. 8. 



1877. WALDnEiMiA "Waltoni. Bav., Proc. Dorset Club, Vol. I., 

 1d1. iii., fig, 5. 



A peculiar species somewhat allied to Wald. emarginata (Sow), 

 but differing from that species in having a roundish base gener- 

 ally very much thickened. There are, in fact, two varieties of 

 this species, one with the thickened base, and the other some- 

 what resembling large Wald. sulbucmlenta (Chap, and Dav.), 

 with a rather thin base. The thickened form seems to be the 

 commoner. This species is generally long in proportion, but a 

 broad variety sometimes occurs. The lesser valve of this species 

 is nearly always perfectly flat. Wald. Waltoni occurs in this dis- 

 trict only in the zone of Parkinsoni, and though not very 

 plentiful it is well distributed. 



Localities. — Bradford Abbas, Broadwindsor, »S:c. (Dorset) ; 

 also at several places in Calvados (France), and near Wurtem- 

 berg, in South-west Germany. 



Dimensions. — Thick form — length 1 inch 4 lines, breadth 1 

 inch, depth 7 lines, depth of base 5 lines. Thin form — length 

 1 inch 3 lines, breadth 1 1 lines, depth 6 lines, depth of base 2 

 lines. Broad form — length 1 inch 5 lines, breadth 1 inch 3 

 lines, depth 10 lines, depth of base 6 lines. 



