OF SOUTHEEN INDIA. 
7 
I. Caryopiiyllia Arcotensis, StoUczka. PI. 1, Figs. 1 — 10. 
? ? Tiirbinolia Arcotenus, Forbes, from Poudiclierry. 
Canjopli. condlmi inverse conicum, modice elatmn, per-varkdnle, frequentissime 
paulo cnrvatnni et ad intervalla irregidariter contractum, basi awjustissima. ajjixuw ; 
siiperficie siddcevi, prope calycem costnlata, costulis snb-cequalUms, obsolete rugulatis 
vel ommino Icevigatis ; calyce circiilai'i sen fere circidari, medio prof unde excavato ; 
septis in quatnor cyclis smpissime perfectis dispositis, lateraliter confertim grami- 
latis, ad marginem cahjcis convexe elevatis : primariis fortissimis, secundariis pamlu- 
lum brevioribiis atque tenuioribiis, terminationibus conspicuiter incrassatis ; palis 
duodecim brevilms, modice incrassatis atque exsertis, ad terminationes septorum ad, 
cyclum tertium pertinentium sitis ; columella bremter Ubei'a, convexa, rugosa, foliose 
torta, circiter quinlam partem calycis diametri crassa. 
This is an extremely variable species, reversely conical, and always possessing a 
very narrow basis, sometimes with a slightly dilated disc by which the specimens 
were sessile. The corals have generally a height of about 17 mm., and the calyx 
a diameter of 9 or 10 mm. Specimens of 20 mm., or a greater height, are very 
rarely met with, and equally rare are those with a very wide calyx, such as the 
specimen represented in fig. 6 on pi. I. The mural theca is well developed, 
rather thinning out towards the edge of the calyx. The surface shows at dis- 
tances irregular rugosities and contractions, on which the costae arc sometimes 
obsolctely traceable ; but they scarcely ever reach as far as the base, and the lower 
part of the polypid is usually quite smooth, while near the upper edge the 
costae arc always distinct. They are sub-equal in strength, smooth, or very 
finely and distinctly rugose. The calyx is circular or very nearly so, deeply 
excavated in the centre ; the columella, convex, rugose, and composed of twisted 
papillae. There arc nearly mvariably four complete cycles of septa present, 
arranged in six systems. The pali are of moderate length and strength, twelve in 
number, one being opposite to each tertial septum (sec fig. Sc). They arc slightly 
raised, and in the lower section of the corallum become, therefore, confluent with the 
adjoining septa (see tig. 10a). The columella is very nearly one-fifth of the entire 
width of the calyx. 
Locality. — East of Andoor, in a pale coloured, moderately coarse sandstone ; 
common. 
Formation. — Arrialoor group. 
( 139 
) 
