ANNIVERSARY ADDRESS OF THE PRESIDENT. XC1X 



higher interest than the discovery of new species. The 6th and 

 7th parts are devoted to Mollusca ; and it will be noticed, in the 

 abstract, that out of 25 species described, 3 only are new, the remain- 

 ing 22 having been before named by preceding authors. This fact 

 exhibits strongly the great caution with which MM. Pictet and 

 Renevier have compared their specimens with the species of other 

 countries, frequently with the specimens themselves, and proves that 

 they have been free from that anxiety to make new species, which is 

 too frequently a prevailing passion amongst palaeontologists :— 



" Terrain Aptien." 



Cardium Bellegardense, Pict. Sf Renevier. — Yellow Marl of Perte 



du Rhone. 

 Cardita fenestrata {Forbes), D'Orbigny. — Lower Greensand, Lower 

 Neocomian, Perte du Rhone. 

 „ Meriani, Pict. 6f Renevier. — Yellow marl, Perte du Rhone. 

 Opis neocomiensis, I? Orb. — Yellow marl, Perte du Rhone. 



„ Mayori, Pict. fy Renevier. — Yellow marl, Perte du Rhone. 

 Astarte Buchii, F. Roemer. — Yellow Marl of Perte du Rhone, and 

 of Sainte Croix. Lower Neocomian, France. 

 „ obovata, Sowerby. — Lower Greensand of Isle of Wight, 



Hard Grit of Perte du Rhone. 

 ,, laticosta, Desk. — Middle Neocomian, Yellow Marl of Perte 



du Rhone. 

 „ sinuata, jyOrb. — Aptian Lumachella of Marolles, Yellow 

 Marl of Perte du Rhone, Red bed of Wassy, and L. G. 

 of Peasemarsh. 

 Crassatella Robinaldina, D'Orb. — Lower Neocomian, Hard Grits of 



Perte du Rhone, Yellow Marl of Sainte Croix. 

 Trigonia Bsedalea, Parkinson.- — Blackdown and Haldon (Dev.), Lower 

 Greensand (Forbes), Neocomian, Yellow Marl, Perte du 

 Rhone. 

 ,, nodosa, Sowerby. — Lower Greensand, Hard Grits of Perte 



du Rhone. 

 „ Archiaciana, DWrb. — T. spinosa, Sowerby. — Lower Green- 

 sand, Hard Grits of Perte du Rhone and Aptian For- 

 mation of Pont (Lac de Joux). 

 ,, ornata, D'Orb. — Neocomian in France, abundant in Yellow 



Marl of Perte du Rhone and of Sainte Croix. 

 ,, caudata, Agassiz. — Blue Marls, Neocomian, Neuchatel; 

 Lower Neocomian, France ; Lower Greensand, England ; 

 Yellow Marls of Perte du Rhone and Sainte Croix. 

 ,, aliformis, Parkinson. — Gault, France ; Lower Greensand, 

 England ; Hard Grits of Perte du Rhone, and probably 

 in the Gault of these localities and of the Savoy Alps. 

 „ carinata, Agassiz. — Neocomian Marls of Hauterive ; Neo- 

 comian, France ; Lower Greensand, England ; Yellow 

 Marl of Sainte Croix. 

 „ longa, Agassiz. — Neocomian, Neuchatel; Lower Neocomian, 

 France ; Hard Grits and Yellow Marl of Perte du Rhone. 



