90 
CRETACEOUS LAMELLIBRANCHIA. 
Triconta Cunnincront, Lycett, 1875. 
1875. 
Lycett, p. 146, pl. xxi, fig. 11. 
Type.—British Museum (Cunnington Collection). 
Distribution —Upper Greensand of Devizes. 
TRIGONIA CARINATA, 
1858. 
1861. 
1865. 
1866. 
1877. 
1896. 
1900. 
Section 6.—BYSsIFERm. 
Agassiz, 1840. 
Additional Synonymy. 
Tricgonra caRiINATA, J. Vilanova-y-Piera. Mém. Geog.-agric. de Castellon, 
pl. iii, fig. 19. 
—- oa P. de Loriol. Invert. Foss. du Mt. Saleve, p. 74. 
— — H. Coquand. Mon. Aptien de |’Espagne, p. 135. 
— ~~ F. J. Pictet and G. Campiche. Foss. Terr. Crct. Ste. 
Croix (Matcr. Pal. Suisse, ser. 4), p. 365. 
a Lycett, p. 179, pl. xxxv, figs. 3—6. 
— — A. Wollemann. Geitschr. d. deutsch. geol. Gesellsch., 
vol. xlviii, p. 846. 
a — = Die Biv. und Gastrop. deutsch. u. 
holland. Neoc. (Abhandl. d. k. 
preussisch, geol. Land. N. F., 
pt. 31), p. 86, pl. iv, figs. 6, 7. 
Remarks.—T. subcarinata, Ebray,' (= T. Heva, Dollfuss) is an allied form, but 
with fewer coste. 
Types.—From the Neocomian of Hauterive. The specimens figured by Lycett 
are in the Museum of Practical Geology. 
Distribution.—Perna-bed of Atherfield and Sandown. Hythe Beds of Hythe, 
Lympne, and Maidstone. Upper Greensand of Ventnor, Blackdown, Melbury 
(near Shaftesbury), and Potterne. 
1 «Btudes géol. sur le départ. de la Nitvre’ (1858), p. 200; Dollfuss, ‘ Bull. Soc. géol. France,’ 
ser. 2, vol. xx (1863), p. 220, pl. ii; De Loriol, ‘Gault de Cosne’ (1882), p. 97, pl. xu, figs. 8—10. 
