FROM THE INFERIOR OOLITE. 503 



like appearance, caused by short radiating lines upon each ring. 

 Wings small. 



There is one specimen in the Sharp Collection in the British 

 Museum, from Northamptonshire ; and, though very defective, its 

 ornamentation is so peculiar as to be worth recording. It is about 

 3 inches long. 



HrconTEs tenutstriattjs, Miinst., sp. 



1836. Spondylus tenuistriatus, Goldf. Petr. Germ. t. 105. fig. 3. 



Left valve small, nearly circular, slightly convex, with prominent 

 umbo, and about thirty-five squared ribs divided by flat interspaces 

 of nearly the same width. The ribs are occasionally nodulated upon 

 their upper surfaces, and only the alternate ones reach the umbo. 

 Auricle distinct. 



Size about half an inch. 



I have obtained several specimens of this fossil from the rubhly 

 beds at the top of the Humphriesianus-zone at Dundry, and from the 

 Parkinsoni-zone of Burton Bradstock. 



It appears to differ from Hinnites velatus, Goldf., as figured by 

 Morris and Lycett, by having larger and more equal rays, as well 

 as by being a smaller shell ; but in the former particular their 

 figure (though not their description) approaches the present species 

 more nearly than does the original one of Goldfuss. 



Lima rigida, Sow., sp. 



1815. Plagiostoma rigidum, Sow. Min. Conch, t 114. fig. 1. 



1835. Lima rigida, Goldf. Petr. Germ. t. 101. fig. 7. 



1861. L. rigida, Thurm. & Et. Leth. Bruntr. t. 33. fig. 2. 



1861. L.perrigida, Thurm. & Et. Leth. Bruntr. t.33. fig. 1. 



1864. L. rigida, Seeb. Hann. Jura, p. 102. 



In the Bristol Museum are some shells from Dundry, which were 

 identified with this species by Mr. Tawney, and there is a similar 

 one from Leckhampton in the Jermyn-Street collection. 



Of the two fine specimens in Sowerby's collection, one is of a 

 deep red colour, with hardly any signs of growth-lines, while the 

 other has very strong " growth-lines, which break the continuity of 

 the rays ; but as they closely correspond in other respects, I can see 

 no reason for supposing them to be of different species, and believe that 

 it would be easy to arrange a series of Inferior- Oolite specimens 

 connecting the two. 



Lima ozptboltjs, n. sp. Plate XVII. figs. 1, la. 



Shell flatly convex, oblique, semielliptic. Umbo small, depressed, 

 rounded. Lima- line* short, low and rounded; the shell curving 

 round in front of it so as to form a moderately concave lunule, and 

 behind it being regularly, though slightly, convex, so that the 

 greatest depth is nearly in the centre of the valve. Pront wing of 

 moderate size and flattened. The margin from its summit forming 

 a concavity with the anterior side of the shell; the inferior side slightly 



* I have used this term, for convenience, to indicate the strong bounding 

 ridge of the lunule, which is so marked a feature in most species of Lima. 



Q.J.G.S. No. 156. 2o 



