OP SOUTnERN INDIA. 
43 
end somewhat thickened and confluent wdth tlic columella, which is central, solid, 
and moderately elevated. The costm arc thinner when crossing the elevated inter- 
spaces hetw^een the calyces, the miu’al mass being rather strongly developed. 
Locality , — Ninnyoor, in a whitish limestone. 
Formation. — Arrialoor group. 
3. Tiiamnastrea crassa, Stoliczlca. PI. IX, Fig. 4. 
Thamnast. corallum crassiwi, irreyidariter expansum, supra undulate planutimi ; 
calycihus irregulariter dispositis, 2 ad 3 m^n. latis, atque 5 ad 7 mm. distant ibtis ; 
septis temiihus, gramdatis, lateraliter dense spinulatis, in tribus cyclis perfectis dis- 
positis. Us ad primum atque secundum cyclum pertinentibus tisque ad columellam 
spongiosam et parvam extensis, cceteris midlo brevioribus. 
Only a fragment of the eorallum of this speeies has been examined, and judging 
from this, the speennen appears to have been unusually large, undulately flattened 
above, convex below, and assuming a thickness of about 100 mm. The calyces are 
irregularly disposed, of small size, and connected by easily curved, thin, granular, 
costae. The septa arc usually disposed in three complete cycles ; only rarely there 
are a few’ of a fourth cycle present ; those of the first and second cycle extend to 
the columella, the others are shorter, and all are laterally densely spinulatcd. The 
septo-costoe are generally arranged in six radiating bundles. 
Locality. — Odium, in brown earthy limestone. 
Formation. — Ootatoor group. 
4. TnAMNASTREA PULLATA, Stoliczka. PI. IX, Pig. 5. ’ 
Thamnast. corallum depressum, tenue irregulariter discoidale, sup>ra plane con- 
vexiuscidum, infra concaviuscidum ; calycibus irregulariter disjjositis, 2'5 ad 3 mm. 
latis, aqyproximatis, septis distanter gramdatis, in tribus cyclis disqmsitis, cyclo tertio 
scepe imperfecto, costis brevibus, regione costali paulo elevata, theca murali satis 
distineta ; columella spongiosa, medio sensim elevata. 
A small species, closely resembling Th. temdssima,* Milne-Edwards and 
Ilaimc, but the corallum is depressed, instead of globular, and the inter- calicular 
spaces are, like the columella, conspicuously elevated, while the calyces themselves 
arc somewhat concave and comparatively rather wide, roundly polygonal. There 
are in both species three cycles of septa, hut the third cycle is usually incomplete ; 
all septa are rather coarsely granular, and only those of the two first cycles extend 
to the spoil giose columella. 
Locality . — East of Parally, in a coarse conglomeratic sandstone. 
Formation . — Ootatoor group. 
* Comp. Bolsohe in Geiuitz’s ‘ Elbetlialgebirge in Sachsen/ 1871, p. 51, pi. 12, figs. 1 — 2. 
( 175 ) 
