PATELLA. 4fii 



In specimens from the Great Oolite the figm^e is stated to be a more lengthened 

 oval, whilst the apex is somewhat more elevated. 



Belatlons and Distribution. — Less orbicular and less conical than P. nltida ; 

 moreover, in this species, the convex side (not sufficiently convex in fig. 4 a) is 

 the shorter. My best specimens are from the base of the Lower Freestones, 

 Leckhampton, where P. inurnata is not uncommon. It also occurs in the North- 

 ampton Sand at Duston, and in the Lincolnshire Limestone at Stoke Lodge. 



405. Patella cf. cingulata, Milnster^ 1844. Plate XLII, figs. 5 a, 5 h, 5 c. 



1844. Patella cingulata, Munster. Goldfuss, Petref. Germ., pi. clxvii, fig. 11. 



Morris and Lycett (' Great Ool. Moll.,' pt. i, p. 88) refer certain shells from 

 the Cotteswolds to Miinster's species. Their figures are not satisfactory ; and, as 

 P. cingulata is an Upper Jurassic form, Cossmann {' Etage Bathonien,' p. 354) 

 suggests that the Great Oolite forms may represent a different species. 



There are two specimens in the Jermyn Street Museum from the Inferior 

 Oolite of Rollwright Heath, in Oxfordshire, which is very high in the series. In 

 their depressed outline these specimens more nearly resemble the figures of 

 Goldfuss than those of Morris and Lycett. The principal resemblance, however, 

 is in the striated growth-lines (fig. 5 c), thus producing a marked concentric 

 ornamentation. 



406. Patella nitida, Deslongchamps, 1842. Plate XLII, figs. 7 a, 7 h. 



1842. Patella nitida, Deslonrjcliamps. Mem. Soc. Linn. Norm., vol. vii, p. 116, 



pi. vii, figs. 7 and 8. 

 1850. — — — Lycett, Anu. Mag. Nat. Hist., 2ud ser., 



vol. vi, p. 410. 



BihUoijrajjlt,)/, 8fc. — There are two specimens in the Jermyn Street Museum, 

 most probably from the Inferior Oolite, Leckhampton. On these Lycett based his 

 identification. 

 Description : 



Length . . . . . 4*5 mm. 



Width . . . . .4 mm. 



Height .... 3 mm. 



Shell conical, capuliform, with a high and sharp apex, which is subcentral. 



61 



