PECTEN. 197 



Holzapfel, Vogel, and Hennig as another species; it appears to differ in having 

 scaly ribs, a larger anterior ear, and a larger apical angle. Groldfuss' pulchellus was 

 thought by d'Orbigny to differ from Nilsson's species, and was named subpulchellus 

 in the " Prodrome." ]'. rniscellus, Groldfuss, 1 appears to be very near to 

 P. pulchellus, and was regarded by d'Orbigny as identical with it. /'. subaratus, 

 Nilsson, 2 although similar in form, is easily distinguished by its more numerous 

 ribs, etc. 



Tijpc. — Nilsson's specimens came from Kopinge, etc. 



Distribution. — Chalk of Trimingham. 



Sub-genus — Neithea, Proud, 1824. 



(' Mem. Soc. Linn, de Paris,' vol. iii, p. 180.) 



Pecten (Neithea) atavus, Rom-er, 1830. Plate XXXIX, figs. 1—5. 



1839. Pecten atavus, F. A. Riimer. Die Verstein. nord-deutsch. Oolithen-geb. 



Ein Nachtrag, p. 29, pi. xviii, fig. 21. 

 1841. — — Die Verstein. d nord-deutsch. Kreidegeb., 



p. 54. 

 1847. Janira atava, A. d'Orbigny. Pal. Franc. Terr. Oct., vol. iii, p. 027, 



pi. ccccxlii, figs. 1 — 3, 5. 

 neocomiensis, d'Orbigny. Ibid., p. G29, pi. ccccxlii, figs. 4, G — 9. 

 1850. atava, d'Orbigny. Prodr. de Pal., vol. ii, p. 83. 



— neocomiensis, d'Orbigny. Ibid., p. 83. 



1854. Pecten atavus, J. Morris. Cat. Brit. Foss., ed. 2, p. 175 (partim). 



1855. Janira atava, G. Cotteau. Moll. Foss. de l'Yonne, p. 117. 



— neocomiensis, Cotteau. Ibid,, p. 117. 

 ? 1859. atava, J. Vilanova y Piera. Mem. geogn.-agric. de Castellon, 



pi. iii, fig. 21. 

 18(51. P. de Loriol. Anim. Invert. Foss. Mt. Saleve, p. 105, pi. 



xiv, fig. 1. 

 NEOCOMIENSIS, de Loriol. Ibid., p. 104, pi. xiv, figs. 2, 3. 

 1808. atava. de Loriol. Valangien d'Arzier (Mater. Pal. Suisse, ser. 



4), p. 48. 

 1870. F. J. Pictei and <!. Campiche. Poss. Terr. Cret. Ste. 



Croix (Mater. Pal. Suisse, ser. 5). 

 p. 237, pi. elxxx. 

 neocomiensis, Pictei ami Campiche. Ibid., pp. 240, 251. 

 (Neithea) obnithopus, It'. Keeping. Foss., etc., Neoc. Upware 



and Brickhill, p. 107, 

 pi. iv, fig. 5. 



i 'Petref. Germ.,' vol. ii (1833), p. 51, pi. x,i. tig. 8. 



-' 'Petrif. Sueeana' (1827), p. 21, pi. ix, fig. 11 ; Hennig, 'Eevision Lamell. i Nilsson's Petrif. 

 Suecana' (1897), p. 16, pi. iii, tigs. It, 10, 17. 



26 



