OF SOUTnEPtN INDIA. 
47 
This genus was recently established tbrcei'tain liassic species, wliich, in external 
appearance, closely resemble LeptophylUa, but differ- from it by the pi-esence of a 
well marked epitbeca, and by their synapticnlm. One species from South India 
appears to be referable to it. It is probable that some of the species without 
columella, described as aberrant forms of Trooltoseris, will have to be referred to the 
present genus. 
Thecoseris agaricina, Stoliezka. PI. XI, Fig. 1. 
Thecos. corallum irregulariter agariciformo, hreviter pedicellatum, calyce supra 
ovate elongatum, epUhecd concentrice rugoso-slriata ; calyce plane convexinscido, medio 
paulo impresso, septis tenuissimis, numerosissimis, cequaliOus, acute denticulatis. 
The short stem of the smgle specimen is only partially preserved, but on the 
lower side of the expanded portion the concentrically rugose epitheca is Avell deve- 
loped. The calyx is of a somewhat irregular, elongatcly ovate shape, slightly convex 
above and impressed in the centre. There is no trace of a columella. The septa 
are very numerous, apparently almost equally thin throughout and finely denticulate 
at their upper edges ; they all somewhat curve towards the periphery, and anasto- 
mose, a circumstance which is probably chiefly due to a slightly irregular growth of 
the corallum, and a somewhat unequal development of the epitbeca. 
Locality. — Near Odium, in a nodular earthy limestone ; only the figured speci- 
men has as yet been found. 
Formation. — Ootatoor group. 
XXIII. Gewws.— CYCLOLITES, Lamarck, 1801. 
Comp. Fromentel, Pal. Fran9. terr. cret., tom. viii, p. 330. 
Corallum circular, ovate or sub-ovate, upper surface hemispherical, or more 
or less flattened, septa very numerous, equal or unequal, radiating from a central 
groove or fossula, in which they meet somewhat irregularly, but do not form a 
separate columella ; base flat or concave, with generally a thin, rarely thickened, 
mural sclerenchyma, covered by a concentrically folded epitheca. 
This genus is as yet only knowm in a fossil state, and by far the largest number 
of species occurs in cretaceous deposits. Fromentel distinguishes a few groups of 
the genus, in order to facilitate the determination of the different forms ; with the 
few species, which occur in South India before us, it is, however, not desirable to 
enlarge on this subject of detailed study. 
Before noticing the four species presently to be described, I have to draw atten- 
tion to a specimen of a CycloUtes, so thoroughly imbedded in a brownish limestone 
from near Ootatoor that it is impossible to extricate it from the rock. Judging 
from external shape and the distribution of the septa, the specimen appears to be 
very closely allied to C. elliptica, Lam., but better specimens are necessaiy to insure 
a good characteristic of the species, or its identification with one already known. 
(‘179 ) 
