PATELLA. 463 



408. Patella Romeri, Morris and Lycett, 1851. Plate XLII, figs. Sa, 8 h. 



1851. Patella Eomeri, Morris and Lijcett. Gt. Ool. Moll., pt. 1, p. 91, pi. xii, 



figs. 6, 6 «, G h. 



A single specimen from tlie lowest bed of Tinkler's quarry at Stamford (Lincoln- 

 shire Limestone) greatly resembles the typical forms from Minchinhampton and 

 Bussage. The Inferior Oolite specimen is somewhat more depressed and orbicular, 

 whilst the interstitial radials are less conspicuous. 



409. Patella fenestr^b, sp. nov. Plate XLTI, figs. 9 a, 9 &. 



Description : 



Length . . . . .41 mm. 



Width . . . . .31 mm. 



Height . . . . .21 mm. 



Shell elliptical, conical, elevated ; apex nearly central, corroded and obtuse. 

 Base oval, sides comjji'essed. Ornamented by rugose radiating costge, which are 

 wide apart and decussated at wide intervals by concentric lines ; tuberculations 

 occur at the points of intersection. Margin thickened. 



Relations and Distribution. — This form seems to stand alone amongst the 

 Patellids of the Lower Oolites. The nearest described species of Jurassic age 

 appears to be P. sulcata, Deslongcham-ps ('Mem. Soc. Linn. Norm.,' vol. vii, p. 115, 

 pi. vii, figs. 9 and 10), from the Inferior Oolite of Port-en-Bessiu. But even this 

 species differs widely. On the other hand, its resemblance to the more elevated 

 varieties of the existing Patella vidgata are quite startling. 



A single specimen has been found by Mr. Wiudoes in the Chipping Norton 

 Limestone, which overlies the Glypeus-gr'it in the neighbourhood of that town. 

 This may be regarded as the highest horizon of the Inferior Oolite. 



410. Patella eetifera, Lycett, 1850. Not figured. 



1850. Patella retifera, Lycett. Ann. Mag. jSTat. Hist., 2Dd ser., vol. vi, 



p. 415. 

 1853. — — — Proc. Cotteswold Nat. Club, vol. i, p. 76. 



Syn. FissuRELLA Brodiet, Lycett. Ann. Mag. Nat. Hist., vol. cit., p. 415 ; 



and Proc. Cotteswold Nat. Club, vol. cit., 



p. 7G. 



