or SOUTHERN INDIA. 
57 
It will be seen that out of the fifty-seven species forty-two are only known 
from the Ootatoor or lowest division, five from the Trichinopoly or middle, and nine 
from the Arrialoor or upper division, while a single species is common to the two 
last. The faunas are, therefore, as well defined as could he expected, and they 
indicate the soundness of the principles upon which the distinctions of these divi- 
sions have been based. 
From our former researches we know that the Ootatoor beds are chai’acteriscd 
as Cenomanien by Nautilus suh-lcccigatus, Ammonites rostrahis (vcl injlatus). Am. 
Itotomagensis, navicularis and IlantelU, Avellana elongata, Inoceramus lahiatus, 
Exogyra sub-auriculata (vel columha), Gryphoia vesiculosa, Terehratula depressa, 
and capillata, Cidaris vesiculosa, and many other fossils. 
The Trichinopoly beds have a good number of characteristic Turonien fossils, 
such as Amm. peramplus, and A. Guadeloupcc, Turritella Neptuni, Pholadomya 
caudata, Eriphyla lenticularis, Modiola typica, Gryplicea diluviana and carinata, 
llhynchonella compti'essu, etc. 
The Arrialoor group, which represents the Senonien and Danien of d’Orbigny, 
is distinguished by Nautilus danicus, Amm. Oolacoodensis, Scala suh-lurVinata, and 
striato-coslata, Bissoina acuminata, Gryphcea vesicularis, pectinata and unyulata, 
Exoyyra laciniata, Amusium membranaceum, Badnla tecta, Inoceramus Crispii, 
Crania lynaberyensis, Cidaris sceptrifera, and many others of upper cretaceous 
type, as arc, for instance, all the Ciliopoda (or Bryozoa), recorded in a former 
number of this volume. 
"When we look upon the coral fauna of the Ootatoor group, we meet with only 
one or two species identical Avith European forms, like Trochosmilia tuba. From., 
and others not satisfactorily determined, which have certain afilnities common with 
some species from the Gosau. The reason of this scantity in identification lies in the 
fact, that there are comparatively only few corals known from Cenomanien beds in 
Europe, and this fact makes, therefore, our Ootatoor coral fauna not only locally 
interesting, but geologically important for the study of this formation. The more 
striking is it when avc find that out of the flA'e species from the Trichinopoly 
beds no less than three, Trochosmilia injlexa, Astroccenia decaphylla, and Isastrea 
morchella, occur in the Gosau and partly also in France, and in both localities 
the beds are referred to the Turonien. One of the species, Ast. decajAiylla, which 
has in Europe a great geographical distribution in space, indicates this by its being 
common to tbe Trichinopoly and Arrialoor groups. From the last named group 
there arc no other identical species with European forms, but we have actually 
not much to go upon in the identification of the species of this group, because 
the older publications on this subject are hopelessly insufficient. 
p 
( 189 ) 
