C PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 



Trigonia Coquandiana, D'Orb. — Chloritic Chalk of Castellane, Lower 



Alps ; Neocomian, Yellow Marl of Perte du Rhone. 

 Area glabra, Parkinson Sf Goldfuss. — Greensand of Quedlimburgh 

 and Aix-la-Chapelle, and, under various synonyms, Gault 

 in France, and Lower Greensand, England, as also in 

 Bohemia. Perte du Rhone. 

 „ Robinaldina, D'Orb. — Neocomian at Marolles, Lower Green- 

 sand of Isle of Wight, Yellow Marl of Perte du Ehone. 

 ? , Raulini, Leym. fy D'Orb. — Lower Neocomian, France; Lower 

 Greensand, England ; Yellow Marl of Perte du Rhone and 

 of Sainte Croix and of the Presta. This species was first 

 named by Leymerie as CucuJlwa Raulini ; and M. Pictet 

 agrees with Edward Forbes in uniting to it A.marullensis 

 and A. neocomiensis of D'Orb. 

 Nuculaimpressa,/SWerfo/. — Neocomian andRed Bed of Wassy, France, 

 Lower Greensand, England ; Yellow Marl of Perte du 

 Rhone and of Sainte Croix. Several synonyms, such as 

 K". Cornuelina, N. planata, N. subobtusa, are united to 

 this species, as also 1ST. subrecurva, Phillips, Speeten 

 Clay. 

 Mytilus lanceolatus, Sowerby. — Neocomian, France ; Lower Green- 

 sand, England ; Yellow Marl, Perte du Rhone. Three 

 species of Sowerby and two of D'Orb. are given as 

 synonyms, but do not materially affect the geological 

 deductions. Yellow Marl of Perte du Rhone. 

 „ sublineatus, D'Orb. — JSTeocomian, Turonian, and 'Aptian, 

 France; Lower Greensand, England ; Hard Grits of Perte 

 du Rhone ; Yellow Marl of Sainte Croix, Gault of Perte 

 du Rhone and of Savoy. This species absorbs Modiola 

 lineata,$W erby, M. angusta, Boem, from the Hils conglo- 

 merate, Mytilus lineatus, Soiverby, M. asper, Forbes, &c. 

 Part 8 is devoted to the two orders Sauridia and Ophidia of the 

 class Reptilia. 



In the first, some bones of a head, collected at Mauremont by 

 MM. De la Harpe and Gaudin, are, after a careful scrutiny, iden- 

 tified with Crocodiles Hastingsice (Owen) from the freshwater 

 Eocene beds of Hordwell Cliff, — a species which Professor Owen has 

 shown to form a passage between the true Crocodiles and the Caimans. 

 The left branch of a lower jaw, found in the breccia of Saint Loup 

 by Professor Morlet, has all the generic characters of a true Lizard, 

 but is insufficient for specific determination. It must have belonged 

 to an individual of the same size as the common European species, 

 Lacerta agilis. Two bony osselets of a cranial plate are referred by 

 M. Pictet to the genus Placosaurus, Gervais, which was established 

 upon one such plate. The French specimen was found resting on 

 the cranium, which it protected, and was obtained from the calcareous 

 Palseotherian Marls of Sainte Radefonde, near Apt ; the Swiss speci- 

 mens were found by Professor de Morlet in the breccia of Saint Loup. 

 The bony osselets, as described by Gervais, were irregularly hex- 

 agonal, mamillated on the surface by blunted tubercles having no 



