232 Intelligence and Miscellaneotis Articles. 



Mr. Kaye, including species of Baculites, Ammonites, Nautilus, Ha~ 

 mites, Ptychoceras, Ancyloceras, Voluta, Cypreea, Conus, Tornatella, 

 Rostellaria, Pyrula, Aporrhais, Trochus, Solarium, Natica, Eulima, 

 Scalaria, Cerithium, Turritella, Dentalium, and Calyptrata ; Ostrea, 

 Exogyra, Spondylus, Pecten, Trigonia, Mytilus, Pinna, Area, Pectun- 

 culvs, Nucula, Cardium, Isocardia, Anatina, Cyther&a, Solen, Phola- 

 domya, Clavagella, Lutraria and Terebratula. Also some fishes' teeth, 

 Echinodermata and corals, accompanied by wood (calcareous) bored 

 by Teredo. 



The fossil wood found in the sandstone exhibits no traces of worm- 

 borings, and occurs in the form of trees denuded of their barks, some 

 of them as long as 100 feet, and all apparently Conifercc. 



2. Six miles from Verdachellum in Southern Arcot, about forty 

 miles from the coast and fifty from Pondicherry, the valley of the 

 river is formed of a limestone which underlies the sandstone and con- 

 tains marine fossils, including species of Ammonites, Nautilus, Mela- 

 nopsis ?, Pleurotomaria, Natica, Pecten, Area, Artemis, Modiola, Exo- 

 gyra, Lima, Cardita, Cardium, Lutraria and Terebratula. 



3. Trinchinopoly. — In this district, at about thirty miles from the' 

 town of the same name, one hundred from Pondicherry, and sixty 

 from the sea, is a limestone formation which Mr. Kaye was unable 

 to visit in person, but from which he procured a quantity of fossils 

 belonging to twenty-seven species of various genera, including Na- 

 tica, Turritella, Triton, Fusus, Pyrula, Voluta, Melanopsis ? (same spe- 

 cies as at Verdachellum), Aporrhais, Strombus, Mactra, Psammobia, 

 Area, Pecten, Ostrea, Cythercea and Cardium. A fragment of an 

 Ammonite accompanied them. 



None of the species appear to be common to the three deposits. 

 Three species are common to Trinchinopoly and Verdachellum. 

 From the latter locality there are 28 species of mollusca identical 

 with lower greensand fossils found in Britain. A single species 

 appears to be identical with one of those from Pondicherry ; but none 

 of the testacea from the last mentioned locality agree with those 

 from Trinchinopoly. The greater part of those from Pondicherry 

 appear to be undescribed forms. Accompanying the very remarkable 

 assemblage of molluscan genera at the latter locality was a single 

 vertebrata of a Saurian, which Professor Owen regards as most nearly 

 resembling that of Mosasaurus. 



Mr. Kaye presented to the Society a series of the fossils from the 

 several beds, all in the most beautiful state of preservation. 



- 

 XXXVI. Intelligence and Miscellaneous Articles. 



AN EXPERIMENT IN PROOF OF THE LATENT LIGHT IN 

 MERCURY. BY PROFESSOR MOSER. 



THE following simple experiment affords such an excellent proof 

 of the existence of latent light in mercury, and is of such interest, 

 that I am induced to give publicity to it without waiting to complete 

 the series to which it belongs : — 



Iodize a silver plate, and then heat it over a common spirit-lamp 



