324 APPE^^DIX. 



Pecten poLYMORPnus, Bronn. Tab. XXXI, fig. 20. 



Pecten polymorpiius. Bronn. Reise, p. 627, sec. Phil. 



— STRIATUS. Marcel, de Serr. Geog. des Terr. Tert. du Midi de la France, p. 131. 



— STRIATLLUS. Lumarck . Sec. Philippi. 



— ix.EQUicosTALis. Id. See. I'hilippi. 



— Isabella. Lamarck. Sec. Philippi. 



— FLAGELLATUS. Id. Scc. Philippi. 



— iLEXUOsus. Id. See. Philippi. 



— POLYMORPUCS. Phil. En. Moll. Sic, vol. i, p. 79, t. 5, figs. 18 — 21. 



— — Dixon. Geol. of Sussex, p. Hi, fig. .3, 1850. 



— — Siimond. Syn. Meth. Inv. Ped., p. 13, 1847. 

 OsTREA STRIATA? Brocchi. Conch. Foss. Subnp., p. .J77, t. 16, fig. 17. 



— DiscoHS. Id. Conch. Foss. Subap., p. .581, t. 14, fig. 13. 



— COAKCTATA. Id. Conch. Foss. Subap., p. .")"4, t. 14, fig. 9. 



— PLICA. Poli. Utr. Sic, t. 28, figs. 1 — ,">. 



Spec. Char. " Testa suhaqiiivalvi, svborbiculari, latiore qiiam lonyd, lonr/ifiidinalifer undidafo- 

 plicatd, striata' auf leevi, jilicis ^) — 12, anriculis nmjtlis siibcequalibug, utraque basi angnstatd ; i.e., simt 

 anguium rectum formante a lateribiis divisd." — Philippi. 



Shell nearly equivalve, suborbicular, broader than long, longitudinally ribbed or plicated ; ribs ,"i — 12 ; 

 auricles large and slightly nnequal, and augulatcd at the base on each side. 



Diameter, 1 inch. 



Locality. Bracklesham. 



This shell is, I believe, not very rare at the above locality, to which place, as far as I know, it appears 

 to be restricted, as a British fossil. 



It much resembles P. Danicus, and is, like it, subject to great variation ; it differs, how^ever, more 

 especially in its auricles, which are larger and more etpial. 



This is a living species in the Mediterranean, and is found fossil at Gravina, according to Philippi. 



The specimen figured is in the British Museum. 



LiMOPsis pygm5:a. Ante, p. 71. 



This is no longer an extinct species ; it has been recently obtained alive by Mr. M'Andrew in the 

 .\rctic Regions. 



LUCINA COLUMBELLA. Jnte, p. 143. 



I have been unable to obtain any further information respecting the integrity of this species. Its claim 

 to the Red Crag is, I suspect, very doubtful. 



CbyPTODON SINUOSU.M. Jnte, p. 134. 



At the above reference the Older Tertiary shell, Lucina Goodallii, was considered only as a variety, as 

 also the Boom shell, Axinns Benedenii, De Koninek, and both were introduced as synonyms to the above 

 Crag fossil. A better examination with fresh specimeus induces me now to believe them distinct. 



