IG 
CRETACEOUS BRACIIIOPOUA 
1. TEREBPwVTrLA DEPRESSA, Lomarck, Tar. cyrta, "Walker, PI. II, Figs. 7 — 8. 
1819. T. depressa, Lam., An. s. vert., vol. vi, p. 219. 
1816. T. anihilh, Forbes, Trans. Gool. Soc., Lond., vol. vii, p. 138, pi. xviii, fig. 12 -—eadem, D’Orb., Prod. 
1852. T. depressa, apud Davidson, Brit. cret. Braoh., p. 70, pi. ix, figs. 9—21, (cnm. syn.). 
23 , ;g „ SchlcenbiU'li, Ocog.-Palinont. Beitrrcge by Beneckc, &c., vol. I, p. 417 (cum. syn.). 
1808. „ „ „ AValker, Geol. Mag., vol. v, p. 403, pi. xviii, fig.s. 1—2. 
T. testa svh-ocata sen sub-rolimdata, sah-dejyressa ; valvis fere (cqucditer con- 
vexiusculiSf sl)'iis iHcreiecuti teiiidbus, nounullis sceqie sub-ntfjosis interposilis, tectis, 
radlatim minute striolatis ; nmbone leoissime incurvo, foramine magno, truncato, 
lateribus nmbonalibus sub-rotundatis, fronte impressis ; dellldio magno, simplicl, 
scepissbne tango, rare brevi, facie convexiiisculo ; fronte valoarum in aduUis specimi- 
nihus plus minnsre dislincte sinuata. 
There arc only three specimens which I am able to refer to this well known 
European species, and all three arc from the Ootatoor beds, the lowest of the South 
Indiciu cretaceous deposits, as at present known. One, a young specimen, has no 
distinct frontal sinus, hut the two other specimens have it distinctly indicated, a 
character which is also clearly shown in Forbes’ figure of arabilis, and which I 
consider to he one of the most distinctive in a comparison with the next species. 
The A'cry fine radiating striation, to which attention has been drawn by the 
late Ur. U. Schloenbach, is also noticeable in the South Indian specimens, but it 
also occiu’s in several other species. The beak of the neural valve is always slightly 
incurved, and obliquely truncate by a large foramen. Tlie beak ridges arc rounded 
or moderately angular, and the frontal area on either side flattened and depressed. 
The size of the deltidium varies ; generally it is large, trapezoid, and on the frontal 
surface somcAvhat convex ; more rarely it is short, as shown in some specimens from 
the Upwarc Greensand, dcsigi4ated by Walker (loc. cit.) as ‘var. egrta.’ To these 
specimens the Indian form undoubtedly exhibits the closest resemblance. As re- 
gards the greater convexity of the valves, there does not appear to be any sensible 
ditfercnce from the Lamarckian type. 
T. depressa occurs in England in the (? Lower) Greensand at Upware, Potton, 
and Faringdon ; in Belgium, and various parts of Germany, it is a characteristic 
fossil of the Tourtia and Lower Pkencr, corresponding to D’Orbiguy’s Ceuomanien, 
and exactly in the same beds it also occurs in India. 
Locality. — North of Odium, in a yellowish brown earthy limestone; rare. 
Fornattion, — Ootatoor group. 
2. Terebratula sub-depressa, Stoliezka, PI. II, Figs. 9 — IG ; PI. Ill, Figs. 1 — 8. 
Ter. testa elongate sen late ovata, modice depressa ; vatcis nonminquam fere 
cequaliler concexivscnlis, saqmisque valva neurali f — vmbonali) altera panlo con- 
vexiore ; super fide concenlrice distanter suhrugose striata, radiathn densissime strio- 
lata, strioUs scep)e indistinctis tel ontnino obsoletis ; nmbone mediocri, crasso, leviter 
incurvo alque foramine lato et sub-roiundo truncato, deUidio brevi, modice latiusculo, 
