10 



CEETACEOTS L.\:\IETJJEEAXrTTTA. 



Suh-gC)1llft Pr-AlilOSTOMA, J. So/rfrhij, 181k 



('Mill. Conoli.,' vol. i, j>. 176.) 



IiiM.\ (Pf.AGiosTOMA) suBHiaiDA, Rumcr, 1836. Plate Til, figs. Tx/, Ji, (5 — *.». Text- 

 figs. 1, 2, 8. 



1836. Lima subrigida, F. A. Riimer. Verstein. uord-Jcutsch. Oolithen-gcb., p. 79, 



pi. siii, fig. 16. 



— — PLANA, Rimer. Ibid., p. 80, pi. xiii, fig. 18. 



1841. — SUBKIGIDA, Bomer. Die Verstein. cl. uord-deutsch. Kreidegel)., p. 57. 



— — PLANA, El'imer. Ibid., p. 67. 



1877. — suBEiGiDA, (t. JS/i^w. Zeitschr. d. deutscli. gcol. Gesellscli., vol. xxix, 



p. 235. 

 1896. — — A. Wollemann. Ibid., vol. xlviii, p. 836. 



1900. — — Wollemann. Die Biv. u. Gastrop. d. deutsch. u. hoUiiiid. 



Neocoms (Abliandl. d. k. preiissich. geol. 



Land.,N.F., pt. :51), p. 30. 



Fia. 1. — Limn {Plagiostoma) suhHgida,'RomQv. C'laxliy Ironstono, Lincolnsliire. Right valve. Natural sizo. 



Sedf^wick Museum, Camliridgc. 



Description. — Shell convex, oval, height sliglitly greater th;iii length ; initcro- 

 dorsal margin nearly straight, postcro-doi'.^nl inucli sliortcr and nearly straight, tlic 

 remainder ronnded and forminor a regular curve. Ai)ical aiiirle rather more than a 



