518 REV. G. E. WHIDBOENE ON SOME EOSSILS 



Pinna clavieoenis, n. sp. Plate XYI. fig. 11. 



Shell large, club-shaped, subangulate in front, flattened and 

 mnch expanded behind ; apex produced ; dorsal side very con- 

 cave; antero-inferior side long and straight; postero-inferior side 

 curved ; postero-inferior corner convex ; surface with no signs of 

 radiations, but with rather regular curved, concentric bands, formed 

 by distinct bulges of growth, which are covered by indistinct thread- 

 like concentric striae, are oblique and most prominent in the central 

 part of the valve, and curve suddenly forward, to unite with the 

 margin. There is one specimen in the Jermyn-Street Museum. 



Dimensions. 5 inches long, by 9 wide, and 2 deep. 



It appears to be a more curved and inequilateral shell than Pinna 

 amjpla (Sow.), and also wants the longitudinal markings, which, 

 however, Morris and Lycett state to be sometimes absent in the 

 latter shell. Thurmann and Etallon, Leth. Bruntr. t. 28. fig. 3, give 

 a figure of P. ampla which approaches it a little more nearly in 

 shape, though still remaining distinct. 



Pinna dundeiensis, n. sp. Plate XYI. fig. 10. 



Shell large, hastate, flattened, very oblique ; anteriorly convex 

 and subacuminate ; dorsal side straight : inferior side rather swollen 

 posteriorly ; surface with 12 or 13 distinct, radiating straight Hues, 

 one of the central ones being larger than the others, which are 

 distant and very rounded, and are rendered nodulous on the lower half 

 of the surface by very distant indistinct transverse lines. Test of two 

 layers, the outer of which is about the eighth of an inch thick, and 

 perpendicularly fibrous. 



Dimensions. 3 inches by 5 inches, and | inch deep. 



I have found this shell at Dundry in the ITumphriesianiis-zoiie, 

 but generally in fragments. There are specimens from that place 

 in the Bristol Museum, and from the Inferior Oolite of Litchborough 

 and Dundry in the British Museum. 



It appears to be a much flatter, broader shell than P. cuneata, 

 Bean, and has fewer rays and less convexity than P. Jissa, Goldf. 

 P. ampla, Young and Bird, appears to be of quite a different shape. 



Mttiltjs peimipilaeis, n. sp. Plate XYI. figs. 13, 13a. 



Shell oblique, hastate, somewhat convex in front, very much 

 flattened and produced at the supero-posterior corner ; umbo quite 

 anterior, small and pointed, projecting forward and slightly com- 

 pressed at its extremity ; hinge-line very long, slightly con- 

 vex, more than f the width of the shell ; anterior wing very 

 small and distinct ; inferior margin very oblique and straight ; 

 infero-posterior corner rounded ; posterior side oblique, forming an 

 obtuse angle with hinge-line ; surface with a few steep, smooth, 

 step-like lines of growth at unequal distances, the lines of greatest 

 convexity running near and parallel to the antero-inferior border. 



Dimensions. 16 lines long, 8 wide and 6 deep for both valves. 



In the Jermyn- Street Museum there are three specimens from the 



