THE BRITISH FOSSIL BRACHIOPODA. 247 



Museum, Cambridge. It was procured from the Middle-Neocomian Sands at Brickhill in 

 Bedfordshire. Mr. Keeping adds to the foregoing description that it is " characterised 

 by its rhomboidal form. In Britain we have only K. lima, Defrance, to distinguish it 

 from a species to which it bears considerable resemblance ; but the front margin in K. 

 lima is truncated, whilst in K. rhomboidalis it is obscurely pointed ; in our new species 

 the beak is less incurved. The hinge-line is, as a rule, more curved, and the dorsal valve 

 is more swollen than in K. lima ; also this latter species is ornamented with ' small granu- 

 lations, or short, hollowed spines/ which I have not found in K. rhomboidalis. Again, 

 the lines of growth are more marked. In geological times the two species seem always 

 to have been separated, K. lima ranging only from the Gault to the Chalk." A search 

 for more specimens would be desirable. 



7. Terebratella Menardi, Lamarck. Dav., Cret. Mon., PI. Ill, figs. 34 — 42; 



Appendix to Supplements, Vol. V, PI. 

 XVIII, fig. 6. 



This appears to be a very rare fossil in the Middle Neocomian at Upware in 

 Cambridgeshire. A single example of it was found by Mr. E. Towry Whyte, and 

 presented by him to the Woodwardian Museum, Cambridge. 



8. Waldheimia Bonneti, W. Keeping. Dav., Appendix to Supplements, Vol. V, PI. 



XVIII, figs. 9, 9 a, b. 



"Waldheimia Bonneyi, W. Keeping. The Fossils and palaeontological affinities of 



the Neocomian Deposits of Upware and 

 Brickhill, p. 129, pi. vii, fig. 4, 1883. 



Shell subpentagonal, longer than wide, broadest about the middle ; sides rounded, 

 tapering posteriorly, slightly indented anteriorly ; valves nearly equal, convex, with a 

 longitudinal median depression in each valve, commencing at about one third of the 

 length of the valve from the beak and gradually widening as it nears the front ; beak 

 moderately incurved and truncated by a circular foramen, completed or margined by 

 small deltidial plates ; surface smooth, marked by concentric lines of growth ; loop long 

 and reflected. 



Length 1 inch 2 lines, breadth 11, depth 9 lines. 



Obs. — In his description Mr. H. Keeping says : " This species varies considerably in 

 its form, much in the same way as does its near ally W. pseudo-jurensis. Some of the 

 specimens are flattened so as to pass into that species by regular gradation, but the 



