234 Intelligence and Miscellaneous Articles, 



10. " On the discovery of remains of Halitherium in the Miocene 

 beds of Malta." By A. Leith Adams, M.B., F.G.S. 



The four upper beds of the Miocene formation of the Maltese 

 group, more especially the Sand-bed and Nodule-bands of the cal- 

 careous sandstone, have yielded several forms of Cetaceans, teeth 

 of Zeuglodon, one or more species of Dugong allied to recent forms, 

 and Balcence ; to these the author has added a tooth, an ear-bone, 

 and some caudal vertebrae of the Halitherium. 



11. " On the affinities of Chondrosteus, Ag." By John Young, 

 M.D., F.G.S. 



The object of this communication was to show, from the cha- 

 racters of the skeleton, that Chondrosteus belongs not to the Chon- 

 drostean division of the Ganoids, as stated by Agassiz, but to the 

 Holostean division, since it possesses a well-ossified basioccipital ; 

 and the lateral walls of the cranium are composed of bones answer- 

 ing to the cartilage bones of ordinary Teleosteans. 



1 2. " On new Carboniferous genera of Crossopterygian Ganoids." 

 By John Young, M.D., F.G.S. 



In this paper the following new genera were described : — Rhizo- 

 dopsis, Strepsodus, Dendroptychius, and Rhomboptychius, all of which 

 were provisionally named some years ago by Prof. Huxley. Their 

 generic distinctness has been fully established by specimens recently 

 discovered. The relation of Rhomboptychius to Megalichthys, and 

 the position of Holoptychius and Rhizodus in this subdivision of the 

 Ganoids, are discussed in the latter part of the communication. 



13. " On supposed burrows of Worms in the Laurentian Rocks 

 of Canada." By Dr. Dawson, F.G.S. 



The author communicated the discovery of perforations, resem- 

 bling burrows of worms, in a calcareous quartzite, or impure lime- 

 stone, of Laurentian age, from Madoc, in Upper Canada, but belong- 

 ing to a somewhat higher horizon than the Eozoon-serpentines of 

 Grenville. 



XXX. Intelligence and Miscellaneous Articles. 



OBSERVATION ON THE PASSAGE OF THE SPARK OF AN INDUC- 

 TION-COIL THROUGH FLAME. BY A. KUNDT. 



TF the current of sparks of an induction-coil be passed through the 

 ■*■ luminous flame of gas or of a candle, no alteration is seen in the 

 flame, excepting that in the path of the sparks the flame is intensely 

 luminous, and, under certain circumstances, this brightly luminous 

 path of sparks is traversed by dark cross bands. When the polar 

 wires are suitably introduced, it appears constant and steady. Yet 

 if the flame is viewed in a slowly rotating mirror, or in one which is 

 moved to and fro in the hand, this apparent constancy is found really 

 not to exist ; for, looked at in the mirror, the image does not seem 

 constantly broadened, but the part above the spark appears alterna- 

 ting, like the flame of a chemical harmonicon when looked at in a ro- 



