PECTEN. 197 
Holzapfel, Vogel, and Hennig as another species; it appears to differ in having 
sealy ribs, a larger anterior ear, anda larger apical angle. Goldfuss’ pulehellus was 
thought by @Orbieny to differ from Nilsson’s species, and was named subpulchellus 
“ce P 
in the rodrome.” P. miscellus, Goldfuss,' appears to be very near to 
P. pulchellus, and was regarded by d’Orbigny as identical with it. P. subaratus, 
Nilsson,’ although similar in form, is easily distinguished by its more numerous 
ribs, ete. 
Type.—Nilsson’s specimens came from Képinge, etc. 
Distribution.—Chalk of Trimingham. 
Sub-genus—Neirnba, Drouet, 1824. 
(‘Mém. Soc. Linn. de Paris,’ vol. iii, p. 186.) 
Precren (Neiruéa) atavus, Pémer, 1839. Plate XXXIX, figs. 1—d. 
1839. Preren avavus, I’. A. Rimer. Die Verstein. nord-deutsch. Oolithen-geb. 
Ein Nachtrag, p. 29, pl. xviii, fig. 21. 
1841. — — _ Die Verstein. d. nord-deutsch. Kreidegeb., 
p. 54. 
1847. Janrra atava, A. d’Orbigny. Pal. Franc. Terr. Crét., vol. i, p. 627, 
pl. eecexlii, figs. 1—3, 5. 
-—- —  neocomiensis, d'Orbigny. Tbid., p. 629, pl. eecexhi, figs. 4, 6—9. 
1850. — AtAvA, d’Orbigny. Prodr, de Pal., vol. ii, p. 83. 
— —  weocomrensts, d’Orbigny. Ibid., p. 83. 
1854. Prcren atavus, J. Morris. Cat. Brit. Foss., ed. 2, p. 175 (partim). 
1855. Janrra arava, G. Cotteau. Moll. Foss. de ?Yonne, p. 117. 
— —  NeEocomtensis, Cotteau. Ibid,, p. 117. 
? 1859. — arava, J. Vilanova y Piera. Mem. geogn.-agric. de Castellon, 
pl. iii, fig. 21. 
1861. —_ —  P.de Loriol. Anim. Invert. Foss. Mt. Saléve, p. 105, pl. 
xiv, fie. 1. 
nrocomtensts, de Loriol. Tbid., p. 104, pl. xiv, figs. 2, 3. 
1868. avava, de Loriol. Valangien d’Arzicr (Matér. Pal. Suisse, ser. 
4), p. 48. 
1870. -—- — F. J. Pictet and G. Campiche. Foss. Terr. Crét. Ste. 
Croix (Matér. Pal. Suisse, ser. 5), 
p- 237, pl. elxxx. 
—  wrocomrensts, Pictet and Campiche. Ibid., pp. 240, 251. 
(Nerruea) ornirHorus, W. Keeping. Foss., ete., Neoc. Upware 
and Brickhill, p. 107, 
pl. iv, fig. 5. 
1 + Petref. Germ.,’ vol. ii (1833), p. 51, pl. xei, fig. 8. 
2 *Petrif. Suecana’ (1827), p. 21, pl. ix, fig. 11; Hennig, ‘ Revision Lamell. i Nilsson’s Petrif. 
Suecana ’ (1897), p. 46, pl. iii, figs. 14, 16, 17. 
OG 
