IV 
Most of these species have been unquestionably shewn to oceur in tlie same beds 
with Am. rostraiiis, and his conclusions lose, therefore, very much of the value 
which they otherwise would have possessed. Again, the Trichiuopoly fossils, most 
of which appear to have been from the neighbourhood of Scrdamungalum, Prof. 
Forbes regarded in general cbaracter as Upper Greensand and partly as Gault. 
Idicsc beds are undoubtedly youngci’, having been in the present Memoirs referred to 
the Trichinopoly group, and relatively Forbes’ parallel was, therefore, correct, but 
not strictly according to the age. D’Orbigny’s fossils, collected by Mr. Fontanier, 
appear to have been chiefly obtained from the higher (Arrialoor) beds at Pondicherry, 
and were readily pronounced by that celebrated Palaeontologist as characterising 
the upper cretaceous beds. At first he thought the majority were Turonien 
species, but shortly after he corrected himself and referred the whole of them to 
the Senonien. 
Bate of i^sue of the different parts of Vol. IV. 
No. 
1. 
No. 
2. 
No. 
3. 
No. 
4-5. 
pp. ii, 32, & 7 plates, were issued 6tli Nov. 1872. 
The CiLiopoDA, 
pp. ii, 34, & 3 plates, 
, pp. ii, 59, & 7 plates. 
No. 4-5. The Corals, Sponges, &c., pp, ii, 70, & 12 plates. 
18th Jan. 1873. 
25th April 1873. 
10th May 1873. 
