CLAVELLATVE. 31 



it is not a common species. In Dorsetshire it appears to be present, judging from the 

 matrix of two specimens which have come under my notice. In the Cotteswold Hills the 

 upper hard ragstones, or Upper Trigonia-grit, yield many impressions of its outer surface ; 

 but examples with the test preserved are more rare. Rodborough Hill, near Stroud, and 

 other localities of the same vicinity, have produced good examples ; similar conditions 

 apply to the uppermost bed of the same rock in Oxfordshire, near Chipping Norton. 

 In the same county the ferruginous Inferior Oolite Sands at Rollwright Heath and Hook 

 Norton have yielded numerous specimens in a beautiful condition of preservation as 

 regards the test, both externally and internally. Examples of these are in the collection 

 of Mr. Stuttard, of Banbury ; and also in the Museum of the National Geological Survey, 

 Jermyn Street. 



Following the course of the Inferior Oolite northwards, Mr. Sharp has failed to discover 

 our shell in the Sands of Northamptonshire ; and it appears to be equally absent in 

 Rutlandshire and in Lincolnshire, although the fossils of the Inferior Oolite throughout 

 its long course in the latter county have received considerable attention. In the North 

 Riding of Yorkshire, at Cloughton, near Scarborough, the hard grey limestone has 

 yielded it rarely ; specimens are in the collection of Mr. Leckenby of that place, and in 

 my own cabinet. Foreign localities are Longvvy and St. Pancre, Luxembourg ; Gueret 

 and Moutiers, France ; also various localities in the Cantons of Soleure and Basle, 

 Switzerland : all in the Inferior Oolite. 



Trigonia Scarburgensis, Lye. Plate IV, figs. 1, 2, 3, 4. 



TrigOxNIA Scaubukgensis, Lycett. Mon. Pal. Soc, 1863, p. 48, pi. xxxvii, fig. 1. 



Shell ovately oblong, elongated, somewhat depressed ; umbones antero-mesial, pointed, 

 but not conspicuous, much incurved, and somewhat recurved ; anterior side moderately 

 produced, but with little convexity ; its border curved elliptically with the lower border ; 

 posterior border lengthened and straight, or sometimes slightly concave ; its extremity 

 attenuated and rounded. The escutcheon is very large, and but little depressed; its 

 length is considerable, or equal to the height of the valves and to nearly three fourths of 

 the length of the marginal carina; its superior border is raised, which renders the 

 superior border of the valve nearly straight. The area is narrow, lengthened, and 

 flattened, delicately transversely plicated, divided by a faintly traced tuberculated median 

 carina and slight furrow ; it is bounded by two small carinas, which, in the young state, 

 are minutely tuberculated ; subsequently they form small elevated plications, and in the 

 most advanced stage of growth even these disappear, and the flattened surface of the area 

 has only the usual folds of growth. The costated portion of the shell has the rows, for the 

 first five or six, regular, sub-concentric, and delicately sub-tuberculated ; those which 



