80 



It occurs at several places in the Bradford Abbas district, but 

 principally at Broadwinsor. 



No. 13. WALDHEIMIA EMAKGINATA, Sow. Plate III., fig. 10-11. 



TEBEBBATULA EMABGINATA, Sow. Min. Con., vol. v., p. 50, pi. 

 435, fig. 5, 1825. 



Shell sub -pentagonal, longer than wide, more or less indented 

 in front, sometimes slightly biplicated, without fold or sinus; 

 both valves convex, the ventral one being the deepest; beak 

 incurved, and truncated by a small circular foramen, separated 

 from the hinge-line by a deltidium in one piece ; beak ridges 

 strongly defined ; margins thickened ; surface smooth ; length 

 one inch, by ten lines in breadth. This species varys very much 

 in shape, some specimens simulating so nearly W. carinata as to 

 be hardly distinguishable. 



It is found at Broadwinsor, Crewkerne Station, and in other 

 places. 



No. 14. WALDHEIMIA CABINATA, Lamarck. Plate III., fig. 6, 

 7, 8 ; and Plate IV., fig. 5-6. 



TEEEBEATULA CABINATA, Lamarck. Anim. Sans, vect., vol. vi., 

 p. 25. 



Shell elongated oval, or sub-pentagonal; dorsal valve longi- 

 tudinally concave along the middle ; ventral valve convex ; 

 keeled ; beak incurved, and truncated by a small circular fora- 

 men, separated from the hinge-line by a deltidium ; beak ridges 

 sharply defined ; surface smooth ; margins thickened ; length, 

 fourteen lines ; width, eleven lines ; depth, six lines. 



This is a very interesting and variable species ; it occurs at 

 Bradford Abbas, Broadwinsor, and other places. The name of 

 Mandelslohi has been given to a broad variety of this species, an 

 example of which, from Bradford Abbas, is figured plate iii., 

 fig. 5. This variety has been named by Quenstedt T. carinata 

 alveata. Another small variety (plate iv., fig. 5-6), which may 

 perhaps be a young condition of the shell under description, 

 occurs at Bradford Abbas. 



