90 CRETACEOUS LAMELLIBRANCHIA. 



Trigonia Cunningtoni, Lycett, 1875. 



1875. Lycett, p. 146, pi. xxiii, fig. 11. 



Tjipe. — British Museum (Cunnington Collection). 

 Distribution. — Upper Greensand of Devizes. 



Section 6. — BYSSiPERiE. 

 Trigonia carinata, Agasdz, 1840. 



Additional Synonymy. 



1858. Trigonia caeinata, /. Vilanova-y-Piem. Mem. Geog.-agric. cle Castellou, 



pi. iii, fig. 19. 

 1861. — — P. de Loriol. Invert. Foss. du Mt. Saleve, p. 74. 



1865. — — H. Coquand. Mon. Aptieu de I'Espagne, p. 135. 



1866. — — F. J. Pictet and G. Campiclie. Foss. Terr. Crc't. Ste. 



Croix (Mater. Pal. Suisse, ser. 4), p. 365. 

 1877. — — Lycett, p. 179, pi. xxxv, figs. 3—6. 



1896. — — A, Wollemann. Zeitschr. d. deutsch. geol. Gesellsch., 



vol. xlviii, p. 846. 

 1900. — — — Die Biv. und Gastrop. deutsch. u. 



lioUaud. Neoc. (Abhandl. d. k. 

 preussiscli, geol. Land. N. F., 

 pt. 31), p. 86, pi. iv, figs. 6, 7. 



Bemarlis. — T. .suhcarinata, Ebray,^ ( = 2\ Heva, Dollfuss) is an allied form, but 

 with fewer costse. 



Tijpes. — 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 ' Gtudes geol. sur le depart, de la Nievre' (1858), p. 200; Dollfuss, 'Bull. Soc. geol. France,' 

 ser. 2, vol. xx (1863), p. 220, pi. ii; De Loriol, ' Gault de Cosne ' (1882), p. 97, pi. xii, figs. 8—10. 



