OF SOUTHEEX INDIA. 
29 
M. -Edwards and Ilaime give the diameter of the calyces at 3 mm. ; this, 
however, is rarely the case. In several specimens from the Gosau hy far the 
greater number of the calyces are only two mm. in average ; the same is to he 
observed in Michelin’s original figure, and in a South Indian example. 
Locality. — North of Alundanapooram, in a coarse sandstone ; and near Ninnyoor, 
in white sandy limestone ; only the two figured specimens have been found ; the 
upper siu’face is a good deal worn off; but the characters of the species are 
unmistakable. 
Formation. — Trichinopoly and Arrialoor groups. 
The species also occurs in the Turon heds at Bains-de-Rcnncs (Corbicres), in 
the Gosau deposits of the Gosau valley and near Piesting in Lower Austida. 
Besides the small specimen from Ninnyoor there is a second large ramose 
specimen in the collection from the same locality. The general growth of this 
specimen is somewhat different from that of decaphylln ; the calyces are poly- 
gonal with raised margins; larger and smaller ones arc irregularly distributed, 
measuring from two or three to four mm. in diameter, a few even five mm. The 
smaller calyces have ten long and ten short septa, exactly as in typical decaphylla ; 
the larger ones have twelve larger and as many shorter ; thus regularly three cycles 
in six systems. The columella is thick and solid. As the only specimen is not 
perfectly well preserved, it is difficult to say whether we have in this branched form 
only a variety of Act. decaphylla before us, or a really distinct species, 
XIII. Genus. — MYCETOPIIYLLIA, 3Hlne-Edwards and Ilaime, ISIS. 
The corallum is massive and sessile by a more or less expanded base, covered 
with a thin epithcca ; the corallites are united by their costo-miu-al theca, forming 
shorter or longer variously twisted scries ; the costm are very short, and, like the septa, 
sharply and nearly equally serrated, the latter being in a small or moderate number 
present ; the calyces are very shallow and the dissepiments very abundant, filling 
up the inter- septal space to very near the top of the calyx ; columella absent or 
rudimentary. 
There are only a few recent and tertiary and one cretaceous {31. antiqua, Reuss, 
from the Gosau) species known. They are easily distinguished by the moderate 
number of septa and the shallow calyces filled up with endothecal dissepiments. 
1. Mycetophyllia nobilis, Stoliczlca. PI. VI, Fig. 1. 
3Iyc. corallum solidum, siqira leviter convexum, infra hasi angustata affixum, 
epitheca tenui, vix striaiula tectum ; calycihus in seriehus varie tortis, j)lus minusve 
elongatis confluent ibiis, 10 ad 15 mm. latis, interdmnque latioribus; costis attenuatis 
brevissimis, conUmiis, nonnunquam theca intercostaU junctis ; septis in quatuor cyclis 
dispositis, cyclo quarto scepissime imperfecto, iis ad primum atque secundum cyclum 
II ( IGl ) 
