578 MR. LINSDALL RICHARDSON ON [NoV. I906, 



Hist. Mus.), [Birchi ?] Besford [clay-pit near], Worcestershire ' (Slatter Colin., 

 Nat. Hist. Mus.) ; rotiformis, Bengeworth clay-pit, Evesham ; [rotiformis ?], 

 Aldington Leys, near Evesham (Slatter Colin., Nat. Hist. Mus.) ; [m'armorece] , 

 Island Magee (Tate Colin., Mus. Practical Geology, Jermyn Street). 



Dentalium etalense, Terquem & Piette. (PL XLV, figs. 14 & 

 15 a-b.) 



T.d. 1865. ' Le Lias Inferieur de l'Est de la France ' Mem. Soc. Geol. France, 



ser. 2, vol. viii, p. 67. 

 T.f. Ibid. pi. ii, fig. 43. 

 T.l. Saint-Menge. 



H. ' Calcaire a A. angulatus.' [Hettangian.] 

 r/. [inarmore<%.~\ 

 Colin. 



Dentalium etalense, Brauns, 1871, ' Der Untere Jura ' pp. 288-89 ; Tate, pars, 1876, 

 ' The Yorkshire Lias ' p. 332 & pi. ix, fig. 13 ; Richardson, 1905, Quart. Journ. 

 Geol. Soc. vol. lxi, p. 394. 



Syn. ? 1858. Dentalium, Quenstedt, 'Der Jura' pp. 55-56 & pi. v, fig. 14 (8); 



also p. 60 & pi. vi, tig. 8. 

 1864. D. elongatum, Dumortier, ' Etudes Paleont. &c.' pt. i, ' Infra-Lias ' 



pp. 143-44. 

 1870. D. cf. Andleri, Emerson, ' Die Liasmulde von Markoldendorf bei 



Einbeck ' Zeitschr. d. Deutsch. geol. Gesellsch. vol. xxii, p. 309. 



Remarks. — Terquem & Piette state that the length of their 

 species is 24 millimetres, and the breadth 2 ; that it differs from 

 Dentalium elongatum in being more slender, more curved, and by the 

 absence of transverse lineae ; and from D. compression, d'Orbigny, 

 by measuring twice the length and having a much thicker test. The 

 holotype came from the angulata-beds of Saint-Menge, but it is very 

 rare there. On PI. XLV will be found a copy of the protograph, 

 and also (fig. 15) a representation of a specimen from the angulata- 

 beds of Stout's Hill, near Bitton (near Bath), preserved in the 

 Moore Collection at Bath. 2 



With Dentalium etalense, Brauns identified a number of specimens 

 from several horizons. He regarded Dentalium compressum, Terquem, 

 as being synonymous with this species (see p. 588) ; he was certain 

 that this was the case with D. cf. Andleri, Emerson ; but was not 

 sure that he was correct in associating Oppel's D. Andleri with the 

 same. Tate thought that Oppel's species was the same as his 

 Dentalium Porilocki. 



In 1876, Tate came to regard his species Dentalium Portloclci as 

 synonymous with D. etalense, Terq. & Piette. Probably most, if not 

 all, of the Yorkshire specimens recorded under this name by Tate do 

 really belong to Terquem & Piette's species, because they are all 

 angulata- and BucMandi-zone fossils; but the Irish specimens, and 

 some recorded by him from other places as well, are Dentalium 

 minimum. The largest Yorkshire example as yet obtained measures 



1 This clay-pit is also abandoned, and nearly overgrown. The only pit now 

 open in the neighbourhood of Pershore is that west of Pigeon House, Drake's 

 Broughton, that at the Atlas Works at Pershore Station being likewise 

 disused. See Mem. Geol. Surv. ' The Jurassic Pocks of Britain ' vol. iii (1893) 

 'The Lias 'pp. 148,149. 



2 Proc. Bath Nat. Hist. & Antiq. P. 0. vol. vii (1892-93) p. 286. 





