Chap. VII.] triciiinopoia- dtstrict — TiiiciiiNcroLY group. Ill 



Pleurotomaria. Artemis, f 



Dentalium. Mactra ? 



Tonuitella. Forbea. Tellina. 



Actconella. Psammohia ? Forbes. 



llinx/icula ? Forbes. Solccurtus. 



Corlula ? 



Thetis., lPo7-omT/u'] Forbes. 



Panopcea. 



Pholadomya. f 



Teredo, f 

 Radiata. 

 Corals. 



PLANTiE. 



C3'cacleous ? and Exogenous ? wood. 

 In the above list the genera of which species or individuals are abund- 

 ant, are marked with an (*) or (-f-) respectively, as in the case of the 

 Ootatoor list. As compared with the latter (given at page 77) the above 



list shows a considerable decrease in the genera of 

 Remarks on fauna. 



Cephalopoda, a decrease which is equally apparent 



in species and individuals. Thus Nautilus is represented by only two spe- 

 cies, oue of which is common to the Ootatoor group ; and of thenondiscoid 

 Ammonitidae, I have only noted one or two fragmentary specimens of 

 doubtful genus. Ammonites are more abundant, some of them, e. g., 

 A. Gautama, common to the Ootatoor beds, but the species and individuals 

 are much less numerous than in the Ootatoor beds. Some also, as A. 

 Sugata, Forbes, are common to the Arrialoor group. Most of the species 

 belong to the section Ligati, others to the Compressi, Rhotomagenses, 

 and Cristati, all characteristic upper Cretaceous divisions of the genus. 

 On the other hand, as compared with the Ootatoor fauna, Gasteropoda 

 and Conchifera are more abundant, both in genera, species, and indivi- 

 duals ; and include some genera, as Strombus, Murex, Pyrula, Fusus, 

 Valuta, Scalaria, Venus, Artemis, Tellina, &c., which are rather 

 characteristic of Tertiary and recent times, and of warm climates. On the 



* Tliose genera to which Professor Forbes's name is affixed arc given on the authority of 

 his Memoir, as I have either not met with them, or have omitted to note their occurrence. 



