TRIGONIA. "^1 



Trigonia l^viuscula, Lycetf, 1875. 



1875. Lyreft, p. 96, pi. xxii, fig. fi. 



Rpmnrl:'^. — I doubt wlietlier this can be regarded as more than a variety of 

 T. ercentrica, Parkinson. The only specimens I have seen are those referred to b}^ 

 Lycett. More material is needed to allow of a definite opinion being given. 



Ti/pe. — From the Grreensand of Ciillompton ; in Mr. Vicary's collection. 



Distribntioii. — Blackdown Greensand of Collumpton. Lycett states that this 

 species was obtained by Mr. Meyer from the Cenomanian of Dnnscombe, l)ut the 

 specimens do not appear to be in Mr. Mej'er's collection. 



Trigonia affinis, Sowerhy, 1818. 



1818. Trigonia affinis, /. Sowerby (ex Miller, MS.). Miii. Couch., vol. iii, 



p. 11, pi. ccviii, fig. 3. 

 1828. — — Defrance. Diet. Sciences nat., vol. Iv, p. 297. 



1840. — — L. Agassiz. Etudes crit. Moll. Foss. (Trigon.), p. 9. 



1844. — siNUATA, A. d'Orhigny. Pal. Fran9. Terr. Cret., vol. iii, p. 147, 



pi. ccxciii. 

 1848. Lyriodon sinttatus, H. G. Bronn. Index Palaeont., vol. i, p. 688 {partlm). 

 1850. Trigonia sinuata, A. d'Orhigny. Prodr. de Pal., vol. ii, p. 161. 

 1854. — — /. Morris. Cat. Brit. Foss., ed. 2, p. 229. 



? 1867. — — E. Giieraiiger. Album Pak'ont. de la Sarthe, p. 14, 



pi. xix, fig. 4. 

 1875. — excentrica, Lycett, pi. xx, fig. 5 (from Le Mans). 



1877. — affinis, Lycett, p. 187, pi. xxi, fig. 7 ; pi. xl, fig. 2 (from Le Mans). 



1896. — — A. J. Jukes-Browne and W. Hill. Quart. Joui-n. Greol. 



Soc, vol. Iii, p. 153. 



Remarli^. — I have compared examples of this species with T. sinuata, d'Orhigny 

 {nan Parkinson), from the Cenomanian of Le Mans, and consider that, as 

 maintained by d'Orhigny, the t-wo are identical. Two specimens from Le Mans 

 were accidentally figured l^y Lycett as English examples (see below). 



Types. — The type is in the Bristol Museum. One of the specimens figured by 

 Lycett (pi. xl, fig. 2) is in Mr. Vicary's collection; the other (pi. xxi, fig. 7), stated 

 to be from Blackdown, is in the British Museum (No. 32396), and was really 

 obtained from the Cenomanian of Le Mans ; the original of pi. xx, fig. 5 (figured 

 as T. excentrica), is also from the same locality, and is in the British Museum _ 

 Casts of these two specimens, labelled T. sinuafa' by Lycett, are in the Scarborough 

 Museum. 



Distribution. — Greensand of Blackdown and Haldon. ? Cenomanian of Axmouth 

 Meyer collection. 



