ASTARTE. 109 



A. cordata, Trautscliokl/ is another example of the same type. A. Saiivagei, de 

 Loriol,' from the Sequauiaii, i.s also similar to A, claxbienain, but appears to be less 

 elongate. 



Diiifrihutioii. — Spilsby Sandstone (zone of Beh'mnitcs Inleraliti) of Spilsl:)y. 

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



AsTARTE siJBCOSTATA, d'Ovhigny, 1850. Plate XIV, figs. 29-36. 



1842. AsTARTE LATicosTA, DcsJiaycs. In A. Leymerie, Mvm. Soe. geol. de France, 



ser. 2, vol. v, \>. 4, pi. iv, figs. 4, 5 

 (uon A. laticosta, Deshayes, 1839). 



1844. — STRiATO-cosTATA, A. (VOrbigny. Pal. Frau9. Terr. Crct., vol. iii, 



J). 64, 1)1. cclxii, figs. 7-9 

 (non A. striato-costata, Edmer, 

 1836). 



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



p. 241. 

 1850. AsTAETE SUBCOSTATA, cVOrbigmj. Prodr. de Pal., vol. ii, \k 77. 



1854. — STEIATO-COSTATA, /. Morris. Cat. Brit. Foss., ed. 2, ]>. 187. 



1855. — SUBCOSTATA, G. Cotteau. Moll. Foss. de I'Yonne, p. 70. 



1856. — LATICOSTA, F. J. Pidet and E. Benevier. Foss. Terr. Aptien 



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

 pl. X, fig. 2. 

 1865. — Leymeeii, K. A. Zlttd. Die,Bivalv. d. Gosaugeb. (Denkschr. d. k. 



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

 xxiv), p. 156. 



1865. — LATICOSTA, H. Coquand. Mon. Ajitien de I'Espagne, p. 126. 



1866. — SUBCOSTATA, F. J. Pidet and G. Campiche. Foss. Terr. Cret. Ste. 



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

 ? 1868. — STRIATO-COSTATA, E. Eicliwald. Letbtea Rossica, vol. li, p. 624. 

 ? 1868. — LATICOSTA, Ekhwald. Ibid., p. 628. 



p 1900. — Leymeeii, G. Mailer. Deutsch-Ost-Afrika, vol. vii, p. 552, 



pl. xxii, figs. 4, 5. 

 1905. _ SUBCOSTATA, E. Harbort. Die Fauna der Scbauniberg-Lippe'schen 



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



De>icription.—^\\e]\ 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), pl. d, fig. 15 ; pl. e, fig. 1 ; vol. xxi, 

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



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

 p. 96, pl. sv, figs. 33, 34. 



