76 CRETACEOUS LAMELLIBRANCHIA. 
Section 3.—GLABRA. 
TRIGONIA ECCENTRICA, Parkinson, 1811. 
1811. Triaonta eccenrrica, J. Parkinson. Org. Remains, vol. iii, p. 175, pl. xii, 
fie. 5. 
1811. — stnvaTa, Parkinson. Ibid., p. 177, pl. xii, fig. 18. 
1818. — EcceNnTRICA, J. Sowerby. Min. Conch., vol. iii, p. 11, pl. ceviii, 
fies; 1512: 
1828. -- pxcEnTRICA, Defrance. Dict. Sciences nat., vol. lv, p. 296. 
1837. = — G. G. Pusch. Polens Paliont., p. 61. 
1837. — stnuATA, Pusch. Ibid., p. 61. 
1840. — ExcentTRICA, L. Agassiz. tudes crit. Moll. Foss. (Trigon.), 
Dae: 
1848. Lyrtopon stnvatus, H. G. Bronn. Index Palxont., vol. i, p. 688 (partim), 
1848. -- EXCENTRICUS, Bronn. Ibid., p. 686 (partim). 
1850. TRriconta ExcentTRICA, A. d’Orbigny. Prodr. de Pal., vol. ii, p. 162. 
1854. — — J. Morris. Cat. Brit. Foss., ed. 2, p. 228. 
1866. — — F. J. Pictet and G. Campiche. Foss. Terr. Crét. 
Ste. Croix (Matér. Pal. Suisse, ser. 4), p. 387. 
1866. — sInuATA, Pictet and Campiche. Ibid., p. 387 (partim). 
1875. — EXCENTRICA, Lycett, p. 94 (partim), pl. xx, fig. 6 (not 5); pl. xxi, 
fig. 6; pl. xxii, fig. 5; pl. xxviii, figs. 6, 9, 10. 
Non 1837. Lyropon excentricum, A. (Goldfuss. Petref. Germ., vol. ii, p. 208, pl. 
exxxvu, fig. 8 (= Trigonia Micheloti, de 
Loriol). 
— 1847. Triconta pxcrntrica, J. Miiller. Petref. Aachen. Kreideformat., pt. 1, 
p. 16. 
— 1847. — sinuata, A. d’Orbiqny. Voy. Astrol. Paléont., pl. iv, figs. 29, 30. 
Reimarks.—This is distinguished from 7. affinis, Sowerby, by being proportion- 
ately longer, more produced posteriorly, less ovoid in outline, and in having the 
cost near the antero-ventral margin less regularly concentric (except in small 
specimens). 
T'ypes.—I have not seen Parkinson’s types. The specimen figured by Sowerby 
is in the British Museum. Specimens figured by Lycett are in the Museum of 
Practical Geology (pl. xxi, fig. 6; pl. xxu, fig. 5), and in Mr. Vicary’s collection 
(pl. xx, fig. 6; pl. xxviu, figs. 6,9, 10). The original of pl. xx, fig. 5, stated by 
Lycett to be from Blackdown, is in the British Museum (No. 32596); it is really 
from the Cenomanian of Le Mans, and is an example of 7’. siiuata, @Orbigny (non 
Parkinson)—see 7’. affinis. 
Distribution—Greensand of Blackdown (Zone xi), Haldon, and Kingskerswell. 
