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SUPPLEMENT TO THE BRITISH 



6. Lingula Beanii, P/rillips. Dav., Oolitic Monograph, p. 9 (in part, not figures). 



Sup., PI. IX, figs. 10, 11, 12, 14 ? 



Lingula Beanii, Phillips. Geol. of Yorkshire, Part 1, pi. ii, fig. 26. 



Much uncertainty and difference in opinion has been entertained and expressed as to 

 whether this species is common to the Lias and Inferior Oolite. At p. 127, of the second 

 edition of the ' Geology of Yorkshire/ Phillips informs us that his L. Beanii was obtained 

 " from the Inferior Oolite sand or dogger at Blue Wick," and it occurs plentifully with 

 Discina reflexa at the base of the Inferior Oolite at The Peak in the same county. 1 



In external shape it is oblong-oval, with sides almost parallel, broadly rounded in front, 

 and very obtusely angular at the beak : the surface is marked with numerous concentric 

 lines. Length 11, width 6 lines (Phillips's type). Now, although it appears to be the 

 general character of the shell to have its beak broadly truncated, or rather very obtusely 

 angular, some examples, such as fig. 12, show a much more acuminated beak, and I have 

 noticed every degree of slope between this last and fig. 10. 



In the eighth volume of the second series of the ' Bulletin of the Geological Society of 

 Prance,' p. 11, PI. I, fig. 8, 1850, Mr. Terquem figures and describes, under the 

 designation of Lingula Vottzii, a shell, of which we have reproduced the original illustrations 

 (PI. IX, fig. 13), and which so closely simulates in form, dimensions, and geological 

 position the typical L. Beanii of Phillips, that we are at a loss to perceive in what it 

 differs from the English specimens so named ; and in addition to this, Mr. Terquem 

 does not fail to inform us that Mr. Voltz had previously referred it to L. Beanii. 



Subsequently, in his work 'Etudes Critiques sur des Brachiopodes nouveaux ou 

 peuconnus,' p. 26, PI. IV, figs. 7, 8, 1869, Mr. E. Deslongchamps describes and figures 

 under the designation of Lingula Voltzii (Terquem) a small Lingula obtained from a bed 

 belonging to the Middle Lias, and corresponding to the zone of Ammonites JDavoei in the 

 Department of the Moselle. He observes that Mr. Voltz and Mr. Davidson have con- 

 founded this species with the Lingula Beanii, from which it is very distinct on account of 

 its large size, and that Mr. Terquem has perfectly established this separation in his 



1 Stratigraphical position of Lingula Beanii in the Blue Wick beds : — 



1. Dark friable shale, and ironstone band. 



2. Yellow Sandstone. Lingula Beanii (one example). 



3. Serpula Bed. Bhynchonella cynocephala and Terebratula trilineata. 



4. Lingula Bed. a. Upper part, Lingula, Discina. b. Middle part. c. Lower part, sandy 

 shales, with fossiliferous dogger, containing myriads of Lingula Beanii and some examples of Discina 

 rejlexa and Bh. cynocephala. 



