BRACHIOPODA. 281 



McChesney. None of the specimens that have been sectioned retain the bra- 

 chial apparatus. 



The name Meganteris or Meqalanteris* has been adopted by various writers, 

 sometimes with questionable accuracy. Megalanteris Archiaci, de Verneuil (sp.), 

 the type of the genus, was described from the Devonian beds of Sabero and 

 the mountains of Leon, Spain ; the material upon which Suess founded his 

 determination of the brachidium, seems to have been derived from the lower 

 beds of the Eifel. Quenstedt has also given figures of internal casts of this 

 form from Lahneck. The species Atrypa inornata, d'Orbigny, from the lower 

 Devonian of western France, has been referred to this genus by GEhlert,! but 

 the figures given by him show a want of conformity to the generic characters 

 of Megalanteris, both in the form of the hinge-plate, the muscular impressions 

 and the regularity of the lateral margins. 



Kayseb has suggested^: the similarity of the Terehratula amygdalina, Goldfuss, 

 to Megalanteris, and (Ehlert, in the work cited, refers d'Orbigny's species, 

 A. amygdala, and the A. Deshayesi, Caillaud, to the same genus, remarking their 

 close similarity to A. inornata. Barrois has also described and figured § 

 A. inornata and A. Deshayesi under the name Megalanteris. It has already been 

 suggested that these European lower Devonian shells represent a type of 

 structure different from that of M. Archiaci, which is hereinbefore designated 

 as Newberria. 



Mr. Davidson figured, without name, in his British Devonian Brachiopoda 

 (pi. XX, fig. 15), and subsequently (Devonian Supplement, p. 20, pi. iii, fig. 1) 

 as Meganteris ? Vicaryi, the exterior of a large shell from the middle Devonian 

 of Woolborough, England, having a smooth surface and inflected margins, but 

 of its internal characters nothing is known. A median line on the brachial 

 valve indicates the presence of an internal septum. 



* The latter word, substituting' the feminine for the masculine form of the adjective, was introduced by 

 (Ehlbbt, in 1887. 



t Annales des Sciences Geologiques, vol. xix, p. 20, pt. ii, figs. 1-10. 

 t Zeitschr. der deutsch. geolog. Gesellsch., vol. xxiii, p. 499. 1871. 

 } Faune du Calcaire d'Erbray, p. 151, pi. x, figs. 5, 6. 1887. 



