PKOCEBDINGS OF THE GEOLOGICAL SOCIETY. [DcC. 7, 



Gasteropoda of the Umtamfana River which also occur in India. 



Name. 



Pugnellus uncatus, Forb. . 

 Fasciolaria rigida, Bail^ , 

 Fasciolaria assimilis, Stol. 



Tritonidea trichinopolitensis Anapaady 



Parchairry, Kulligoody 



Andoor, Coonum, Shutanure 

 Olapaudy 



Pollia pondicherriensis, Forb 



Lagcna nodulosa, Stol 



Cerithium (Fibula) detectum, 



Stol 



Turritella multistriata, Ess. . . 



Scalaria turbinata, Forb 



Chemnitzia undosa, Forb. .., 

 Euchrysalis gigantea, Stol. ... 



Solariella radiatula, Forb. 



Avellana ampla, Stol. 



Localities in India, where 

 the species also occur. 



Alundanapooram 

 Olapaudy 



Karapaudy , 



Pondicherry 



Pondicherry 



Pondicherry 



Alundanapooram, Comara- 



poUiam 



Vylapaudy, Olapaudy, 

 GomarapoUiam, Arri- 



aloor 



Andoor, Kalakonuttom. 

 Puravoy, Moraviatoor, 



Odium 



N.W. of Veraghoor 



Eange. 



Trichinopoly gr. 

 Trich. group. 

 Trich. gr. 

 Trich. gr. 

 Trich. gr. 

 Arrialoor gr. 



Arrialoor gr. 

 Trich. gr. 

 'Jrich. gr. 

 Trich. gr. 



Trich. & Arr. gr, 



Arrialoor gr. 

 Trich. gr. 



Ootatoor gr. 

 Trich. gr. 



It is quite clear that most of the species obtained from this African 

 locality (" Izinhluzabalungu ") resemble in every respect those of 

 the Trichinopoly series of India. The Trigonia beds with Ammo- 

 nites Kay ei, A. Rembda, (fee, show the true character of the Ootatoor 

 beds of the Trichinopoly district, whilst we have the Trichinopoly 

 group represented by eighteen species, which also occur in India. 

 The Arrialoor group is proved only by Ammonites Gardeni, which 

 was first described from Africa, but has since been found by Stoliczka 

 in the Indian Cretaceous series. 



The plant-beds with Teredo find their representative in the lower 

 beds of the Ootatoor group of the Trichinopoly district; and from this, 

 and also the fact that the preceding plant-bearing Karoo formation 

 finds its analogue in the Indian Ootatoor plant-beds (not the Oota- 

 toor group), the conclusion is easy to arrive at, that both Africa and 

 India were, after the development of the Table-Mountain Sandstone, 

 one continuous continent, which afterwards was covered by the 

 Cretaceous sea. 



Between the deposition of the Table-Mountain Sandstone and that 

 of the plant-bearing blue shales and of their Boulder-bed, which 

 form the base of the extensive Licynodon-sandstones, a long time 

 must have elapsed. 



The large area, now covered by the Indian Ocean, must have been 

 the basin for an extensive series of lakes, which would explain the 

 occurrence of the same plants and large reptiles which were then 

 living in India and also in South Africa. It must have been a 

 period of long-enduring tranquillity, and no great disturbance what- 

 ever seems to have occurred. These periods of repose, which wit- 



