102 CRETACEOUS LAMELLIBRAXCHIA. 



i'V(/«i7//— ASTARTID^, Gnnj. 

 Genus — Astaete, J. Soicerbij, 1816. 



(' Min. Conch.,' vol. ii, p. 85.) 



Astaete elono.vja, iVOrhujiKj, 1844. Plate XIV, figs. 2 a, ft, 3. 



18-i2. AsTAKTE OBLONGATA, Dfslwijef ill A. Leijmerie. Mem. See. gc'ol. de France, 



ser. 2, vol. v, pp. 5, 24, pi. vi, fig. 1 

 (non oblonga, Sowerby, 1826). 

 1844. — ELONGATA, A. i.V Orhujiiij . Pal. Franc. Terr. Cri't., vol. iii, p. 68, pi. 



cclxiii, figs. 8 — 11. 

 1850. — — iVOrhujnii. Froclr. de Pal., vol. ii, p. 77. 



1855. — — G. Cotteau. Moll. Foss. de I'Yonne, p. 69. 



1866. — — F. J. Pidet and G. Campiclu: Foss. Terr. Cn't. Ste. 



Croix (Maler. Pal. Suisse, ser. 

 4), p. 310, pi. cxxiv, figs. 8, 9. 

 1868. — — P. de Loriol. Valaugieu d'Arzier, p. 28, pi. ii, fig. 7. 



1871. — — F. Stoliczka. Palieout. ludica, Cret. Fauna S. India, 



vol. iii, p. 285. 

 1000. — — A. WoUemanii . Die Biv. u. Gastrop. d. deutsch. u. liol- 



liind. Neocoms (Abhaudl. d. k. 

 preussisch. geol. Land., N. F., pt. 

 31), p. 102. 



Vcscviptluii. — Shell thick, elongate, rounded-oblong or oval, convex, compressed, 

 very inequilateral. Postero-dorsal margin curving veutrally to join the obtuse 

 and slightly curving posterior margin. Postero-ventral extremity rounded. Ven- 

 tral margin nearly straight. Anterior margin rounded. Umbones small, with an 

 indistinct keel passing from them towards the postero-ventral extremity. Luiiule 

 narrow. 



Ornamentation consists of strong concentric ril)s, somewhat unequal in size, and 

 separated by narrow grooves. Margins of valves creuulated. 



Length 21 mm. ; height 22 mm. 



Affinities. — Astarte cingvhifa, Geinitz,' from the Cenomaniau of Plauen, is 

 probably identical with this species. 



A. cJoncjata is easily distinguished from other Cretaceous species by its elongate 

 form. 



lieuiaii-.i. — The only specimens seen are in tlie Museum of Practical Geology. 



' 'Das Elbthalgeb. in Sacliseu' (Palasoulographica, vol. xx, pt. i, 1873), p. 226, pi. 1, fig. 8. Non 

 A. cingulata, Coutejcau, 'Kimmerid. de Montbeliard ' (1859), p. 267, pi. xi, figs. 5 — 7. 



