OF SOUTHERN INDIA. 
15 
3. Trociiosmilia ini’lexa, Ileitss. PL II, Figs. 1 — 4. 
18.51-. Ti'ochosmilia injlexa, Reuss, Denk. Akad., Wien, Math. Nat-wiss. Klasso, vii, p. 80, pi. v, figs. 3 — .5. 
1867. „ „ apud Fromentel, Pal. Pran 9 . terr. cret., viii, p. 270, pi. 39, fig. 1. 
Trooh. corallum conoideum, basi atltnuatum, arciiatum alque affl.vum, modice 
compressimi ; iheca murali crassiuscida, costis acutis, granulatis, trihus incequcdUer 
(mediano duobus alteris fortiori) tenuiorihm inter duos fortiores sitis, omnibus in 
parte supera distinctioribus, ad basin nonnunquam fere ohsoletis ; spatio eolumellari 
angustissimo, longo, septis in quinque cyclis perfectis dispositis, (nonnunquam cyclo 
sexto imqjerfectoJ , Us ad cyelum primum, seeundum atque tertium pertinentibus for- 
tissimis, ad terminationes internas incrassatis ac truncatis, op)positis scope fere con- 
tig uis. 
The corallum is generally of a tolerably large size, compressly conoid, witli 
an attenuated and curved basal portion, and a comparatUely small place for attach- 
ment. The surface is covered by continuous, rather sharp and granular costiE, of 
which three unequally thinner ones are placed between two stronger ones. The 
same is the case mth the septa, of which there are, as a rule, five cycles, but often 
in large specimens there is a sixth incomplete cycle present. The length of the 
columellar space Amries ; in rounder specimens it amounts to only about two-fifths of 
the longer diameter ; in more compressed ones, it is sometimes nearly one-half of it. 
The septa of the three first cycles are almost equal in strength, and their ends at the 
edge of the columellar space are thickened and truncated, often nearly touching 
each other. 
The largest .specimen in our collection measures about 80 mm. in height, though 
the base is not perfect, (about 12 mm. of the original length having been broken 
away) ; the larger diameter at the lower end is about 40, and near the calyx, Avhich 
is somewhat irregularly compressed, about 70 mm. The A'ariations in the com- 
pression of the corallum and the number of septa are indicated by the sections 
represented in figs, lb, 2 and 3. 
Localities. — Near Koloture, in an impure sandy, yellowish limestone; near 
Andoor and north of Alundanapooram, in a coarse conglomeratic sandstone ; not 
common ; at the two last named localities mostly rolled fragments Avere found. 
Formation. — Trichinopoly group. 
The species was first described by Prof. Reuss from the Gosau deposits in the 
Austrian Alps, and has since also been found in the Turonien beds near Trets 
(Bouches du- Rhone). 
Its geological position in India exactly corresponds Avith that in Europe. 
( 147 ) 
