158 W. H. Hndleston — On the Yorlishire Oolites. 



more so than T. affinis, wliere the height and width are nearly equal. 

 According to D'Orbigny, T. gradiis is a fossil of the Middle Lias of 

 Normandy (being found with Am. spinatus and margaritaius), whilst 

 Deslongchamps speaks of it as from the Upper Lias. It was noted 

 by Mr. Tawney as occurring sparingly in the I.O. of Dundry, and 

 that author regarded T. carinata, Lye, as amongst the synonyms. 



Trocliotoma calix is a fossil of the Inferior Oolite throughout 

 England, being found in the Northampton Sand, in the I.O. of 

 the Cotteswolds, and also, as we have seen, in the I.O. at Dundry. 

 I am not aware of its having been noted in the Lias of this country ; 

 in Yorkshire it is confined exclusively to the Dogger. 



Brauns does not quote any species of Trochotoma from the Middle 

 Jura of N.W. Germany, but Laube speaks of T. affinis as not un- 

 common in the Brown Jura of Balin. 



Genus Patella, Linn^us, 1758.=Helcion, Montfort and D'Orbigny. 



This genus, so abundantly represented both in species and in- 

 dividuals in the Great Oolite of Minchinhampton, is extremely scarce 

 in the Yorkshire Oolites, and not represented at all in the Yorkshire 

 Lias.^ 



84. — Patella graphioa, Leckenby, 1859. PI. IV. Figs, 7, 7a. 



1859. Fatella ? graphica, Leckenby (Bean. MS.), Q.J.G.S. 1859, p. 13, pi. 3, fig. 3, 

 1875 Ibid. Phillips, G. T., 3rd edition, p. 260. 



Compare also — 



Patella teiniistriata, Deslongchamps, Mem. Soc. Linn. Norm. vii. p. 114, pi. 7, 

 figs. 5, 6. 

 ,, Mosensis, Buvignier, Stat. Geol. Meuse, p. 27, pi. 21, figs. 3 and 4. 

 „ rugosa, Sow. var. Corallian Gasteropoda, Geol. Mag. 1881, PI. 4. Fig. 5, 

 p. 67 of sep. mem. 

 Selcion seniirugosum, Laube, Gaster. von Balin, p. 3, pi. 1, fig. 3. 



Description. — Specimen from the Kelloway Eock (zone 5), Scar- 

 borough Castle Hill. Bean Collection, British Museum. Type 



BEFIGURED — 



Length 15 millimetres. 



Width 13 „ 



Height ? 6-5 „ 



The following is Mr. Leckenby 's desci'iption. " Shell oval, 

 obliquely conical, apex very excentric, and marked by many radiat- 

 ting impressed lines, which become somewhat obsolete towards the 

 margin." 



The shell is now in a spathic condition, with a shining black 

 surface, and is preserved in a hard greyish grit. 



Relations and Distribution. — This species differs from P. rugosa, 

 Sowerby, chiefly in the fineness of the radial lines, and possibly in 

 having a more excentric apex. The references already given will 

 serve to indicate its apparent affinities. 



^ I have seen in some collection a large, imperfectly pi-eserved Patella from the 

 Dogger of the interior, whicli, as far as I can remember, presented some resemblance 

 to P. 'J'essonii, Desl. Should I again come across this specimen, it may be added to 

 the list. 



