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SUPPLEMENT TO THE BRITISH 



First Division. Tretenterata (King), genera provided with an anal aperture. 



Genus Lingula, Bruguiere. 

 1. Lingula ovalis, Sow. Dav., Ool. Mon., p. 98, PI. 1 8, figs. 14 ; Sup., PI. IX, fig. 1— 



9; PI. X, fig. 16 3; PI. XI, fig. 29. 

 Lingula ovalis, Sow. Min. Con., Tab. 19, fig. 4, April, 1813. 



Since briefly describing this species at p. 98 of the old work, I have, through the 

 kindness of several friends, been able to examine a great many perfect specimens from 

 different localities. The largest example was found by Mr. Blake in the Kimmeridge 

 Clay of Weymouth it measured one inch in length by seven lines in breadth, but the 

 shell is usually much smaller. The largest specimen from Shotover Hill in the Oxford 

 Museum, for a drawing of which I am indebted to my late and most valued friend Prof. 

 Phillips, measured nine lines in length by five in breadth, the shell being longitudinally 

 oval and slightly acuminated at the beak. The species occurs also in the same formation 

 at Ely, and at Studley Wood. Small specimens were obtained by Mr. Peyton, in 1873, 

 from cores of Kimmeridge Clay, during the Sub-wealden boring at Netherfield, near 

 Battle, at a depth of 295 feet, and were identified by Prof. Phillips. 2 Since that period 

 the shell has been found in great profusion, and in the adult condition, in the same 

 locality, throughout a thickness of over seven hundred feet, where it is associated with 

 Discina latissima. It has also been found by Messrs. Walker and Hudleston in the 

 Kimmeridge Clay of Yorkshire. 



It should, however, be remembered that Sowerby's figured type (Sup., PI. IX, fig. 1) 

 " was found in a lump of a hard white marly stone among the sand, above the clay stratum, 

 near Pakefield in Suffolk." I have also a similar specimen from the drift of Norfolk. 



L. ovalis is not a rare fossil in the Kimmeridge Clay. It was found in abundance, 

 and for the first time, in France by Mr. Peyton, in a certain bed some two or three feet 

 in thickness, in the Kimmeridge Clay near the shore between Boulogne-sur-Mer and La 

 Creche. 3 Several species of Lingula from the Palaeozoic period and upwards are so similar 



1 See Mr. Blake's excellent paper "On the Kimmeridge Clay of England," 'Quarterly Journal Geol. 

 Soc.,' vol. xxxi, p. 196, 1875. 



2 Bradford Meeting of British Association. In the 'Hastings and St. Leonards Advertiser' for 

 October, 1873. 



3 'Geol. Mag.,' vol. x, p. 574, 1873. Monsieur de Loriol describes and figures French examples in 

 p. 243, pi. xxv, figs. 27, 28, of his 'Monographic paleontologique et geologique des etages superieures de 



