ON THE PUEBECK BEDS OF THE VALE OF WAKDOTJE. 



253 



No. ft. in. 

 Brought 1 

 forward J 



16 Hi 



23. 1 4 Soft white limestone, laminated, " White bed." Archceo- 

 niscus. 



2-1. 1 Brown rock, shelly, large bivalves, oysters, fish-remains. 



25. Oolitic stone, brown. 



26. Soft limestone, vertical fracture. 



27. 2 "Beef." 



28. 6 Sand and limestone in layers. 



29. 2 Chert. 



30. 2 Sandy clay, dark brown, shelly. 



31. 2 5 Hard grey marl, and brown soft rock, very varying in 



their proportions, sometimes the hard marl taking up 

 all the space, and vice versa. " Cinder " containing 

 scattered Ostrea distorta, and Trigonice. 



32. 3 Hard crystalline limestone, in 1, 2, or 3 layers, with thin 



sand or clay between, blue outside, and containing 

 lumps of chert, Cy eludes in clay parting with vegetable 

 remains and Pethidines. Cyclcides and OstrecB in the 

 chert. 



33. 1 Sandy rock, yellow. 



34. 2 Dark clay. 



35. 1 6 Hard grey marl. Insect-beds of Purbeck. 



36. 2 Clay. 



37. Hard crystalline rock, shelly. 



28 6, ] 



Discussion. 



Mr. Hueke remarked that the faima of the " Cinder-bed " being 

 very limited, even where it was best known, namely at Swanage, 

 any addition to it was of great importance. The discovery of the 

 species described by Mr. Etheridge was especially important, the 

 fossil being so strongly characterized that no doubt could be enter- 

 tained as to its distinctness, while, at the same time, it was par- 

 ticularly interesting as binding together two other forms, an older 

 and a younger one, and thus, to a certain extent, bridging over the 

 gap between the Jurassic and Cretaceous Trigonice. 



Dr. Duncan thought that the Wealden-Purbeck forms a series 

 intermediate between the Cretaceous and the Jurassic. 



Prof. Seeley agreed with the author that the form is a new 

 species. 



The Atjtiioe stated that he had shown the specimen to Dr. Lycett, 

 who agreed with him as to its peculiarities of character. 



