86 CRETACEOUS LAMELLIBRANCHIA. 
TRIGONIA UPWARENSIS, Lycett, 1875. 
1875. Triconra UpwaRENsIs, Lycett, p. 143, pl. xxiii, figs. 8, 9; pl. xxxix, fig. 4. 
83 — — W. Keeping. Foss., ete., Neoc. Upware and Brick- 
hill, p. 118. 
Remarks.—This species is allied to 7. Archiaciana, @Orbigny, but the coste 
are more numerous and have greater curvature near the anterior border. ‘The 
costelle on the area appear to be generally more numerous and more nearly 
perpendicular to the carina. The outline of the larger specimens appears to be 
more rounded than in 17’. Archiaciana. 
Types.—In the Museum of Practical Geology. The specimen figured on Lycett’s 
pl. xxxix is in the collection of Mr. J. F. Walker. 
Distribution.—Lower Greensand of Upware. 
TriGontaA ARCHIACIANA, @ Orbigny, 1844. 
Additional Synonymy. 
1866. Trraonta Arcuractana, #. J. Pictet and G. Campiche. Foss. Terr. Crét. 
Ste. Croix (Matdér. Pal. Suisse, ser. 4), 
p. 380. 
5. — _— Lycett, pp. 140, 202 (partim), not the figures. 
—_ 
oO 
“NI 
Remarks.—It seems doubtful whether this species occurs in England; I have 
seen two specimens from the Peria-bed of Atherfield and Sandown, which may 
perhaps belong to it; but they are not sufficiently perfect for exact determination. 
The surface of the specimen from the Gault of Okeford Fitzpaine, figured by Newton,} 
has perished, so that I am unable to give any opinion as to its affinities. 
Triconta spinosa, Parkinson, 1811. 
Additional Synonymy. 
1875. Triconta spinosa, Lycett, p. 136, pl. xxiii, fig. 10; pl. xxiv, figs. 8, 9; 
pl. xxviii, figs. 1, 2. 
P1881. — — J. Kiesow. Schrift. d. nat. Gesellsch. in Danzig, 
vol. v, p. 413. 
1 «Proc, Dorset Nat, Hist, and Antiq. Field Club.,’ vol, xviii (1897), p. 96, pl. iui, fig. 16. 
