TRIGONTA. 
“NI 
“I 
TRIGONIA LavIuscuLA, Lycett, 1875. 
1875. Lycett, p. 96, pl. xxii, fig. 6. 
Remarks.—I doubt whether this can be regarded as more than a variety of 
T. eecentrica, Parkinson. The only specimens I have seen are those referred to by 
Lycett. More material is needed to allow of a definite opinion being given. 
Type.—From the Greensand of Cullompton; in Mr. Vicary’s collection. 
Distribution —Blackdown Greensand of Collumpton. Lycett states that this 
species was obtained by Mr. Meyer from the Cenomanian of Dunscombe, but the 
specimens do not appear to be in Mr. Mejer’s collection. 
TRIGONTA ArriInts, Sowerby, 1818. 
1818. Triconra arrinis, J. Sowerby (ex Miller, MS.). Min. Conch., vol. iii, 
p- Ll, pl. ceviii, fig. 3. 
1828. — — Defrance. Dict. Sciences nat., vol. lv, p. 297. 
184.0. — — L. Agassiz. Etudes crit. Moll. Foss. (Trigon.), p. 9. 
1844. — stnuava, A. d’Orbigny. Pal. Frang. Terr. Crét., vol. iii, p. 147, 
pl. cexciii. 
1848. Lyrropon stnvatus, H. G. Bronn. Index Paleont., vol. i, p. 688 (partim). 
1850, Trraonra stnuara, A. d’Orbigny. Prodr. de Pal., vol. ii, p. 161. 
1854. — — J. Morris. Cat. Brit. Foss., ed. 2, p. 229. 
? 1867. — —  &. Guéranger. Album Paldont. de la Sarthe, p. 14, 
pl. xix, fig. 4. 
1875. — ExcENTRICA, Lycetl, pl. xx, fig. 5 (from Le Mans). 
1877. — AFFINIS, Lycett, p. 187, pl. xxi, fig. 7; pl. xl, fig. 2 (from Le Mans). 
1896. -- — A.J. Jukes-Browne and W. Hill. Quart. Journ. Geol. 
Soe., vol. lii, p. 153. 
Remarks.—I have compared examples of this species with 7’. sinuata, d@ Orbigny 
(non Parkinson), from the Cenomanian of Le Mans, and consider that, as 
maintained by d’Orbigny, the two are identical. ‘Two specimens from Le Mans 
were accidentally figured by Lycett as English examples (see below). 
Types.—The type is in the Bristol Museum. One of the specimens figured by 
Lycett (pl. xl, fig. 2) is in Mr. Vicary’s collection ; the other (pl. 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 pl. xx, fig. 5 (figured 
as 7’. excentrica), is also from the same locality, and is in the British Museum, 
Casts of these two specimens, labelled 7’. stiuata by Lycett, are in the Scarborough 
Museum. 
Distribution. —Greensand of Blackdown and Haldon. ? Cenomanian of Axmouth 
Meyer collection, 
