OF SOUTHERN INDIA. 
49 
Tills species bears a close rcsemhlance to C. spinosa, Fromcntel, (Pal. Franc, 
terr. ci'ct., viii, p. 342, pi. 00, fig. 3), which clifiers from the Indian fossil hy more 
densely spinnlatcd septa and a much shorter fossula. 
Localities. — Near Veraghoor* and Valudaym*, in pale coloured sandstone ; near 
Suderampet, in bluish sandstone ; not uncommon. 
Formation. — Arrialoor group. 
3. Ctclolites filamentosa, (Forhes). PI. X, Figs. 10—12. 
1816. Fungia filcmentosa, Forbes, Trans, Geol. Soc., Lond., vii, p. 163, pi. xix, fig. 11. 
1851. Cycluseris „ , Mil. -Edwards and Ilaime, Polyp, foss. terr. palajoz., p. 127, and Hist. Nat. des 
Coral., iii, p. 61. 
1870. Cydolitesfilamcnlosa, apud Fromcntel, Pal. Fran?, terr. cret., viii, p. 341, pi. 69, fig. 3. 
Cycl. corallum circulare cel suh-rotundum, heniisphericiim, laterihiis valde con- 
vexis ; fossula dimidio diametri breviore, 'modice profunda, centrali ; septis numero- 
sissimis atque exilissimis, septo quoque quinio vel sexto paidum fortiore, onininis 
acute granulatis lateraliterque spinulosis ; basi scepissime concava, rare fere plana, 
concentrice crasse p^Ucala, theca murali solida et crassa, radiaiim obsolete striolata. 
Diam. spcciminis maximi 23 ; alt. 1 1 mni. 
This is a species with extremely thin septa, which on a well preserved surface 
scarcely vary in strength. This character combined with the shorter fossula, and a 
more regularly hemispherical shape, readily separates it from the previous species, in 
which also the mural theca at the base of the coralliun is much thinner than it 
is m filamentosa, although this last is generally the smaller species. 
Locality. — Near \aludayur, in a grey, fine-grained sandstone; apparently 
common. 
Formation. — Arrialoor group. 
4. Cyclolites oubiculus, Stoliczka. PI. XI, Fig. 2. 
Cycl. corallum orbiculare, parmim, supra convexiuscidum, infra concaviuscidum ; 
fossida brevissima, sub-ovata, satis profunda ; septis qjercrassis, circiter 5G, fortiori- 
bus cum brevioribus atque temdoribus alternantibus, distanter grosse sub-tuherculatis-, 
basi concava, sub-lcevigata. 
The single specimen differs so essentially from other sjiecies of Cyclolites, 
that, although in a rather deficient state of jireservation, it can hardly be confounded 
with any other known torm. The solidity of the corallum and the unusual strength 
of the septa do not make it probable that the specimen is very young. The fossula 
is moderately concave, central, and somewhat ovate in shape. There are about 26 
* Comp. Mem. Geol. Surv. of ludia, vol. iv, p. 136, where, in his report upon the geology of the Trichinopoly 
district, Mr. H. F. Blanford refers to this species under the name of Fungia filamentosa, Forbes. 
N ( 181 ) 
