OP SOUTIIEllX INDIA. 
23 
sinus is usually well marked, or even a biplicatiou is indicated. In both these 
forms, which gradually pass into each otlicr, the beak has a moderate size. 
Locality. — These two varieties which represent true suhrotnnda occur in very 
large numl)ers in the greyish, somewhat ferruginous, sandstone south-w'est of Mul- 
loor (where T. hiplicata is rare), and north and south of Karapaudy ; more rarely 
south-west of Murvanoor, at Olapaudy and Vylapaudy ; all these localities are in 
the Arrialoor group. From other groups only a single specimen exists in the col- 
lection, in a coarse silicious sandstone, and it is stattal to be from Kolakonuttom, a 
locality situated within the boundary of the Trichinopoly group. 
The tim’d variety may be noted as var. siibiuidata ; some of the spechnens are 
identical witli the form described by Leymerio as albensis. It is a roundly oval or 
oval shell, often with more convex valves than the last, with a simple broad or 
almost obsolete sinus in front, and generally with a remarkably small, sometimes 
almost minute beak (comp. tigs. 17 — 23, pi. vi). 
Locality. — This variety chiefly occurs in the Trichinopoly beds ; it is vei’y com- 
mon in the ferruginous earthy rock at Shalauure and also at Andoor and between 
Andoor and Veraghoor; only a few specimens are from Vita goody (east of Vera- 
ghoor), situated within the geographical extent of the ^li'rialoor group. 
Formations. — Trichinopoly and Arrialoor groups. 
In Europe (England, Germany and France) T. snbrotimdu occurs in strata imme- 
diately above the liotomayensis beds (exactly as in India), extending to the lower 
Senonien. Davidson quotes it also from the Red Chalk (?= Gault), but this 
occurrence is somewhat doubtful, and so is also that in the uppermost cretaceous 
beds of Riigen and in Sweden. 
7. Tekebiiatl’la capillata, d'Archiac, PI. VII, Fig. 1. 
1842. Spondylus undulatus, Geinltz, Charaoteristio Petra:!’. Sachs. Kreideg., p. 82 (ex parte), and 1843, Verst. 
von Kicslingswalda, pi. vi, fig. 8. 
1847. Terehratula capillata, d’Archiac, Mom. Soc. Geol. Prance, 2ud ser., vol. ii, pt. ii, p. 323, pi. xx, 
figs. 1 — 3. 
1830. Terehratula cajnllata, Geinltz, Quadersandstein-gebirge, p- 212. 
1852. '•ieadem, Davidson, Brit. Grot. Brach., p. 40, pi. v, fig. 12. 
1808. eadem, Sc hloenhaob, Geog. Paheout. Bcitiwge, by Beuecke, &c., vol. i, p. 454. 
Ter. testa ovata sen siib-pentagona, snperftcie radiatim dense costellata sea 
striata, costellis ad intervalla striis incrementi abrnptis intersectis ; valca neurali 
alter'd paido coneexiore, umbone prodneto, modice incurvo atqiie foramine rotundato 
truncato, area concava ; deltidio parvo, medio suturd, indistinetd diviso ; valmhoimali 
subrotundata, antice in speciminibits adullis medio paulum imprressa. 
Although only a single neural valve has as yet been found in the South Indian 
cretaceous deposits, there can, I think, be no reasonable doubt as to the identity of 
that specimen with the European T. capillata. The general subpentagonal form, 
the convexity of the valve and of its beak, the concave area, the fine costuliform 
