OSTREA. 393 



Zone of MavioipileK tc.'^fitdiiiariiiK of Farnborougb, Ropley, Taplow, and Brighton. 

 Recorded by Rowe from tlic Sussex and Tlianet coasts. 



Utntacrinvs band of Devizes Road (Salisbury) ; Odehani, Alresford, and Itclien 

 Abbas (Hants) ; Margate. 



Zone of Aft'uiocamax iiitadnifiix of Bullington, Ropley, Wield, Andover, and 

 Rottingdean. 



OsTEEA LUNATA, XllsxoN, 1827. Plate LX, figs. IG— 1<>. Plate LXI, figs. 1—0. 



1816. OsTEEA CANALicuLATA, /. Sotferlij. Miu. Concli., vol. ii, p. 81, pi. cxxxv, 



fi^'. 1. (Nou canalicvlata, Soweibv, 

 1813). 



1827. — LUNATA, »S'. Nilsson. Pfti-if. Suecaua, p. 31, pi. vi, fig. 3. 



1833. — —A. Goldfuss. Petref. Genu., vol. ii, p. 11, pi. Ixxv, Cg. 2. 



1834. — nxsvTA, S. G. Morton. Svnop. Org. Remains Cret. XJ. States, p. 51, 



pi. ix, fig. 6. 

 ? — — MESENTERicA, Mortoii. Ibid., p. 51, pi. ix, tig. 7. 



1837. — LUNATA, W. Hisinger. Lethsea Suecica, p. 49, pi. xiv, fig. 4. 



1849. — — T. Brown. lUustr. Foss. Conch. Gt. Britain aiul hvlautl. 



p. 147, pi. Ixi*, figs. 20, 21. 

 1854. — LARVA, J. Morris. Cat. Brit. Foss., ed. 2, p. 173. 

 1869. — UNGULATA, H. Coquatul. Men. Ostrea, Terr. Crt't., p. 58 (jMrtim), 



pi. xxxi, figs. 6—8 (? 9, 10). 

 r" 1870. — LUNATA, H. Crediier. Zeitschr. d. deutsch. geol. Gesellsch , vol. 



xxii, p. 227. 



1884. — (Alectryonia) LARVA, C. ^. TI7/(7i'. Ostreida; of N.America (4tli 



Aun. Rep. U.S. Geol. 

 Survey), p. 296, pi. xlii, 

 figs. 2—5. ? 6 (not 7—9). 



1885. — LARVA var. NASUTA, it*. P. H7/;7M(?. Brach. and Lamellibr. Raritan 



Clays (Mou. U.S. Geol. 

 Surv., vol. ix), p. 34, pi. iii, 

 figs. 3, 4. 



1894. — LUNATA, A. Henniij. Geol. Foreu. i Stockholm Furhaudl., vol. xvi, 



p. 515. 



1895. — (Alectrtonia) lunata, F. Vogel Holliindisch. Kreide, p. lO. 

 1897. — LUNATA, A. Hennig. Revis. Lamellibr. i Nilsson's "Petrific. 



Suecaua," p. 14. 

 1907. — NASUTA, S. Weller. Cret. Pal. New Jersey, p. 447, pi. xliii, figs. 7, 8. 

 ? — • — MESENTERICA, Weller. Il)id., p. 446, pi. xliii, figs. 9 — 14. 



Description. — Shell inequivalve, elongated between the umbo and the posterior 

 extremity, curved regularly, usually sickle-shaped. 



Left valve moderately or slightly convex, the part near tlie umbo being more 

 convex than the later part. Finl)o small, usually curved posteriorly, with, in nearly 



