42 
CRETACEOUS CORALS OR AXTUOZOA 
inter se distantihus ; septis 2i ad 30 crassiuscidis, in trihus cyclis dispositis, nonmm- 
quani cyclo quarto imperfccto ; columella spongiosa ; costis later aliter dense granu- 
latis, rectiuscnlis seu modice undulatis. 
The coralluiii is largely orhicular, with au almost flat, upper, aud a moderately 
convex lower surface. The calyces arc quite irregularly distributed, only toAvards 
the periphery they become somewhat concentrically confluent. Each has a breadth 
of about 3 to 5 mm., and the centres of the adjoining ones are between 7-10 mm. 
distant, except when an interpolation of younger calyces takes place, in Avhich case 
they arc closer to each other. There are slight depressions to be observed between 
the calyces. One of the peculiarities of the present species is, that the septal 
costm continue rather straight, or slightly undulating, from one calyx to the other. 
There arc, as a rule, three complete cycles of septa, but sometimes their number 
rises to 30, so that a few septa of the fourth cycle begin to appear ; generally only 
12-15 of them extend to the columella, Avhich is distinctly spongiose, somewhat 
elevated in the centre. 
The species is closely allied to Th. decipiens, Mich., {Th. confusa, Reuss), but 
differs from it by the absence of the peculiar regularity in the costae extending in 
a concentric direction from one calyx to the other, a character Avhich ahvays 
appears to be well marked in the European fossil. 
Localliies. — North-east of Kauray, in a brown limestone, and cast of Parally, 
in a pinkish, conglomeratic and sandy limestone ; not common. 
Formation.— Ootatoor group. 
2. Tuamnastrea brevipes, Stoliezha. PI. IX, Pigs. 2 — 3. 
Thamnast. corallum agariciforme, supra convexiusculum, hreviter pedicella- 
turn, hast lata et irregulari sessile, cqntliecd tenui indutmn, infra epithecam tenuiter 
costellatum, costuUs granuliferis ; calycihus irregidariter disjjositis, majorihus atqiie 
minorilnis intermixtis, concaviusculis, scope suhrotimdcdis, circiter 5 mm. latis ; 
septis in tribus cyclis dispositis, cycto tertio scope imperfecto, diiodecim ad columellam 
spongiosam extensis, cceteris hrevioribus ; interspediis ccdxjcum modice elevcUis, costis 
nonnunquam sub-obsoletis instructis ; columella medio solidida, eleveda. 
A small, shortly pedunculated species, sessile by a broad irregular base. The 
epitheca is very thin, and the surface below it marked Avith gi'anular rather thin, 
more or loss confluent or branching ribs. The upper surface is convex , the 
calyces irregularly arranged, about 5 mm. in diameter, aud from 3 to 8 mm. 
distant, measured from the centre of one calyx to the other, iheie arc tliiee 
cycles of septa present, but the third cycle is often incomplete, and gencially only 
the older tAveh’^e septa extend to the columella ; they appear to have their inner 
( ITT ) 
