ASTARTE. L09 



A. cordata, Trautscliold, 1 is another example of the same type. A. Sauvagei, de 

 Loriol, 2 from the Seqnanian, is also similar to A. claxbiensis, but appears to be less 

 elongate. 



Distribution. — Spilsby Sandstone (zone of Belemnites lateralis) of Spilsby. 

 Claxby Ironstone (zone of B. lateralis) of Bcnniworth Haven. 



Astarte subcostata, (V Orbigny, 1850. Plate XIV, figs. 29-3G. 



1842. Astarte laticosta, Deshayes. In A. Leymerie, Mem. Soc. geol. de Franco, 



ser. 2, vol. v, p. 4, pi. iv, figs. 4, 5 

 (non A. laticosta, Deshayes, 1839). 



1844. — striato-costata, A. d'Orbigny. Pal. Franc. Terr. Cret., vol. iii, 



p. 64, pi. eclxii, figs. 7-9 

 (non A. striato-costata, Romer, 

 1836). 



1845. Venus (?) [striato-costata], E. Forbes. Quart. Journ. Geol. Soc, vol. i, 



p. 241. 

 1850. Astarte subcostata, d'Orbigny. Prodr. de Pal., vol. ii, p. 77. 



1854. — striato-costata, J. Morris. Cat. Brit. Foss., ed. 2, p. 187. 



1855. — subcostata, G. Cotteau. Moll. Foss. de l'Yonne, p. 70. 



1856. — laticosta, F. J. Pictet and E. Renevier. Foss. Terr. Aptien 



(Mater. Pal. Suisse, ser. 1), p. 88, 

 pi. x, fig. 2. 

 1865. — Leymerii, K. A. Zittel. Die;Bivalv. d. Gosaugeb. (Denkschr. d. k. 



Akad. Wien, Math.-nat. Classe, vol. 

 xxiv), p. 156. 



1865. — laticosta, H. Coquand. Mon. Aptien de l'Espagne, p. 126. 



1866. — subcostata, F. J. Pictet and G. Campiche. Foss. Terr. Cret. Ste. 



Croix (Mater. Pal. Suisse, ser. 4), p. 307. 

 ? 1868. — striato-costata, E. Eichwald. Lethtea Eossica, vol. ii, p. 624. 

 ? 1868. — laticosta, Eichwald. Ibid., p. 628. 



? 1900. — Leymerii, G. Midler. Deutsch-Ost-Afrika, vol. vii, p. 552, 



pi. xxii, figs. 4, 5. 

 1905. — subcostata, E. Harbort. Die Fauna der Scliaumberg-Lippe's.li.'ii 



Kreidemulde, p. 60, pi. iv, fig. 6. 



Description. — Shell small, usually rather convex, subquadrate or subtriangular, 

 moderately or very inequilateral. Antero-dorsal margin concave. Anterior and 

 ventral margins rounded. Postero-dorsal margin long, nearly straight, forming an 



1 C. Rouillier, ' Bull. Soc. Nat. Moscou,' vol. xix, pt. 2 (1846), pi. d, fig. 15 ; pi. e, fig. 1 ; vol. xxi. 

 pt. 1 (1848), pp. 274, 275. Trautscliold, Ibid., vol. xxxiii (1860), p. 347. 



2 De Loriol and Pellat, ' Mon. Paleont. et Geol. etages sup. Jurass. de Boulogne-sur-Mer ' (1874), 

 p. 96, pi. xv, figs. 33, 34. 



