Geological Society of London. 87 



7. Submerged forests, evidently occupying a long period subse- 

 quent to the deposition of the stream tin-gravels. 



8. Recent marine and fluviatile deposits. 



In conclusion he remarked on the paucity of superficial deposits 

 in Cornwall, the absence of evidence of glacial conditions, and the 

 proofs of great changes in the level of the area. 



II. — December 18, 1878. — 1. " On Remains of Mastodon and 

 other Vertebrata from the Miocene Beds of the Maltese Islands." By 

 Prof. A. Leith Adams, M.B., F.R.S., F.G.S. The author recognized 

 the following Maltese formations : — 



Upper Limestone. — Maximum thickness over 250 feet, passing 

 into a sandy rock, and that into a hard red limestone. Fossiliferous, 

 containing 4 Brachiopoda, several Lamellibranchs and Gasteropoda, 

 and 25 Echinodermata (10 being peculiar). 



Sand Bed. — Maximum thickness about 60 feet, variable in 

 character, characterized by vast abundance of Heterostegina depressa ; 

 15 Vertebrata. 



The Marl Bed. — Maximum thickness over 100 feet, but sometimes 

 almost wholly thinned out. Organic remains rarer than in the 

 Sand Bed. 



The Calcareous Sandstone. — Maximum thickness rather over 200 

 feet. Contains bands of nodules, of which the second is rich in 

 organic remains. Hence come the noted teeth of Squalidaa. Among 

 its invertebrate fauna are many Pectens, with other Lamellibranchs, 

 Gasteropods, and Brachiopods. Also 22 species of Echinodermata. 



The Loioer Limestone. — Maximum thickness over 400 feet. Scutella 

 snbrotunda and Orbitoides despansas are abundant in the upper part, 

 and it is generally fossiliferous. 



In a nodule-seam in the Calcareous Sandstone in the Island of Gozo 

 two rather imperfect teeth of a Mastodon have been found. Both 

 are penultimate molars. They agree most nearly with the teeth of 

 Mastodon angustidens, but the characters are not sufficiently well 

 preserved to differentiate the species with certainty. 



The same formation has furnished teeth of a Phoca to which the 

 specific name rugosidens has been given by Prof. Owen. Large 

 teeth referable to the Phocidaa are found 1 in the nodule-seams of the 

 Calcareous Sandstone and in the Sand Bed ; the Marl Bed has also 

 furnished a portion of a jaw. 



The Woodwardian Museum contains a part of a jaw of Sqnalodon, 

 evidently from a nodule-seam of the Calcareous Sandstone (found by 

 Scilla circ. 1670). The Sand Bed and Calcareous Sandstone have 

 furnished remains of more than one species of Delphinus, and large- 

 sized Cetacean vertebrae are found in nearly all the beds, especially 

 the Sand Bed. Halitherium has been obtained from the Sand Bed, 

 Marl Bed, Calcareous Sandstone, Lower Limestone, and (?) Upper 

 Limestone. 



One specimen of Ichthyosaurus gaudensis, Hulke, has been 

 furnished by the Calcareous Sandstone ; the same has also furnished 

 Melitosaurus champsoides, Crocodilus gaudensis, and Sterrodus meli- 

 tensis. Myliobates toliapicus and allied species have come from all 



