Prof. E. Forbes on Fossil Invertehrata from Southern India. 169 



chiac with respect to palaeozoic fossils, and by myself among tertiary and recent 

 forms, viz. that the range of the geographical distribution of species is usually cor- 

 respondent to the range of their distribution in time. 



We have already seen that this collection affords strong evidence in favour of 

 the proposition, that the marine faunas of distant localities, under similar condi- 

 tions of climate, depth and sea-bottom, maintain their relations rather by the 

 representation of forms by similar forms than by identity of species. 



In every point of view this collection is of the highest interest. The fossils are 

 as beautiful as they are interesting, and specimens of the finer species seem to be 

 abundant. It is most desirable that further inquiries be made into the stratigra- 

 phical relations of the beds whence they were procured. Verdachellum and Trin- 

 chinopoly will doubtless yield many more species than have yet been brought to 

 Europe. 



EXPLANATION OF THE PLATES. 



Plate VII. 



Fig. 1 a. Ammonites Garuda : b. back view : c. septal suture. 



2 a. Ammonites Juilleti : b. back view : c. septal suture. 



3 a. Ammonites Rembda : b. its keeled back. 



4 a. Ammonites Yama : b. back view. 



5 a. Ammonites Pavana : b. back view. 



6 a. Ammonites Siva : b. back view : c. septal suture. 



7 a. Ammonites Soma : b. back view : c. septal suture. 



8 a. Ammonites Ganesa : b. back view : c. septal suture. 



9 a. Ammonites Vishnu : b. back view : c. septal suture. 



10 a. Ammonites Surya : b. back view. 



11 o. Ammonites Durga : b. back view. 



Plate VIII. 



Fig. 1 a. Ammonites Brahma : b. outline of back : c. a young shell : d. septal suture. 



2 a. Ammonites Cunliffei : b. outline of back : c. a young shell : d. septal suture. 



3 a. Ammonites Kayei : b. outline of back : c. septal suture. 



4 a. Ammonites Gala : b. outline of back : c. septal suture. 



5 a. Ammonites Varuna : b. outline of back : c. septal suture. 



6 a. Ammonites Rouyanus : b. back view : c. septal suture. 



7 a. Ammonites Neva : b. outline of back : c. septal suture. 



8 a. Ammonites diphylloides '. b. outline of back: c. septal suture. 

 9. Outline of the fragment of Ammonites ? indicus. 



