11 
X. — Vermel, with 5 species. 
XI. — Crustacea, with 3 species, all specifically undeterminable. 
XII. — Fisces, with 17 species, only characterised by solitary teeth. 
XIII. — Sauria, bones and a tooth, apparently belonging to a Jlegalosauriis. 
Thus, nearly seven hundred and eighty species of animals have been noticed in 
this scries of volumes, devoted exclusively to the description of the fossil remains 
found in the cretaceous beds of the Tricliinopoly and South Arcot districts. 
At the conclusion of each of the difierent Monographs, I have given a short 
review of the geological facts bearing upon the study of the respective class, and 
this dispenses ivith the necessity of going into detail on this occasion. 
I may briefly notice the following : — 
Mr. II. F. Blanford, assisted by several colleagues in his survey of the Trichi- 
nopoly and neighbouring districts during 1858-60, arrived at the conclusion that 
the cretaceous deposits* arc divisible into three groups, the lowest the Ootatoor- 
the next the Tricliinopoly-, tlie highest the Arrialoor- group. 
This division has been retained' throughout all the Monographs, and I am glad 
to say, it has been very much strengthened by the examination of the fossils, many 
of which are jieculiarly characteristic for the respective groups. The general results 
of this examination can be very briefly expressed in the following table ; — 
Souin IxDiA, 
Kxglaxi). 
Fbaxck. 
Gekmaxy. 
OOTATOOB GbOUP 
Zone of Amm. rosfrafus and Hotoma- ') 
ffcndg, InoceraniiiB labia/us, Qryphtsa ( 
mbauriculata {=columba) aud Tereb- f 
rttif«/a tUpresBa. J 
Upper Greensand 
Chalk Marl. 
aud 
Cenomauicn or Tourtia 
Unter Qunder 
Quadersandsteiu 
teror Plainer). 
Tbichixopoly Group ...- 
Zone of /ItMmowift** perantplvs, Phohi- A 
domyacaudiita, Modiolatypica, Qry- { 
ph^a diluvianUt Hhynchonellu com- ( 
V. pretia. ) 
Lower Chalk 
Turonicu . . 
Mittcl Quadcr. 
Arrialoor Group 
'' Zone of AVm/i7h* danicus and 
OotacoodeuBh, Exopyra pccHnata and ( 
ungulata, Oryphaa cegiculomt, Inocera- t 
s. inuB Cripgii, Crania Jpnaberpensis. J 
Upper Chalk 
Senouien . . 
Ober Quader. 
(Uutorer 
aud Cu- 
The parallel is of course only general, but considering the great distance of 
these deposits, it is as close as could be expected. If we would enter into details, 
the deposits, geographically so differently situated, would no doubt show some pecu- 
liarities of their own, and an absolute identity of the succession of the beds might 
not bo possible, partly because some of the species had, on account of physical 
* Resting on plant-beds of apparently uppermost jurassio age, and these again immediately on gneissose rocks. 
