JURASSIC AND TRIASSIC BRACHIOPODA. 161 



W. indentata appears to vary a good deal in shape, some examples being very little 

 indented, and even almost straight in front, while others bear a certain degree of 

 resemblance to W. cornuta. A specimen in Mr. Beesley's collection even shows a 

 tendency to slight biplication. 



139. Waldheimia emarginata, Sow. Dav., Ool. Mon., p. 35, PI. IV, figs. 18 — 21; 



and Sup., PI. XXIII, figs. 5, 6, 7. 



Waldheimia emaeginata, Dav. Proc. of the Dorset Nat. Hist. Field Club, pi. iii, 



figs. 10, 11, 1877. 



Nothing new. It varies very considerably in shape, some examples approaching even 

 to W. cornuta.. It occurs in the Inferior Oolite at Broadwinsor, and in other places 

 already recorded. 



140. Waldheimia Waltoni, Dav. Ool. Mon., p. 36, PI. V, figs. 1 — 3 ; and Sup., 



PI. XXIII, figs. 8, 9, 10. 



Terebratula emarginata and T. Bajociana, D'Orb. (pars). Prodrome, 1850 



(according to Mr. E. Deslongchamps). 

 — — Dav. Proc. of Dorset Nat. Hist. Field Club, pi. iii, 



fig. 5, 1877. 



I have nothing to add to the description I have given of this variable species beyond 

 stating that large and fine examples have been found by Professor Buckman and Mr. 

 Darell Stephens in the Inferior Oolite at Broadwinsor, and Bradford Abbas in 

 Somersetshire and Dorsetshire. It occurs in the zones of Am. Parkinsoni, Am. 

 Humphresianus, and Am. Sauzei. In Prance it is found in the same horizons, and in 

 various localities, especially in Normandy. It has also been obtained from the Inferior 

 Oolite near Wurtemberg, in Germany. 



It is always very variable in shape. The smaller valve in some specimens is almost 

 flat, in others slightly convex, also more or less elongated oval, and often very much 

 thickened marginally. 



A small variety of W. Waltoni (Sup., PI. XXIII, figs. 9, 10) has also been found 

 by Mr. J. P. Walker in the Inferior Oolite (Rh.-cynocephala bed) at Haresfield, 

 Gloucestershire. 



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