228 Ititelligence and Miscellaneous Articles. 



Ala molles, breviusculee, concavje : remige Irak brevissim^, 4t& 



5tdque longioribus. 

 Cauda mollis, elongata, gradata. 

 Tarsi elongati. 



Pedes majusculi : halluce ungueque postico longiusculis. 

 Ptilosis mollis, laxa. 



The wings and tail in the birds of this group are transversely 

 barred. Tlie typical species are crested. 



AcTiNODURA Egertoni. Act. cvistata ; supra nitide rufo-brunnea 

 olivaceo tincta, suhtiis pallide rufo-brunnea ; cristd, occipite, ge- 

 nisque brunnescenti-cinereis ; remiglbus ad basin rufis, pogoniis 

 nigra flavoque fasciatis ; secundariis nigra brunneaque fasciatis; 

 rectficibus sardidi riifo-brunneis, lineis saturatioribus transversim 

 natatis, albaque apiculatis. 

 Long. tot. 84-unc.; ala, 3-I-; caudee, 4-|-; tarsi, 1-^; rostri, 1. 

 Rastnim pedesqixe brunnei. 

 Hab. in Nepalia. 



The specimen described was presented to the Society by Sir P. 

 Grey Egerton, Bart., M.P. 



The following species were also characterized by Mr, Gould . viz. 

 Corvus pectoralis, Carv. curvirostris, Prionit.es cosruliceps, and Plyc- 

 tolophus productus, of which the characters are given in the Pro- 

 ceedings. 



XLVIII. Ititelligence and Miscellaneous Articles. 



BRITISH ASSOCIATION FOR THE ADVANCEMENT OF SCIENCE. 

 SIXTH MEETING. 



THE sixth meeting of this Association, held at Bristol, has been 

 highly satisfactory in every respect, both as regards the number 

 and the eminence of the men of science who attended, the quantity 

 and value of the communications, and the zeal and cordiality which 

 were manifested. A general outline of the proceedings has been 

 given in the daily and weekly papers : we shall, we conceive, best 

 promote the interests of science by reserving our pages as last year 

 for authentic and official details. We may, however, just notice the 

 subjects of two of the communications, on account of the lively in- 

 terest which they excited. 



On the change in the chemical character of Minerals induced by 

 Galvanism. By R. W. Fox. 



Mr. Fox mentioned the fact, long known to miners, of metalh'- 

 ferous veins intersecting different rocks containing ore in some of 

 these rocks, and being nearly barren or entirely so in others. This 

 circumstance suggested the idea of some definite cause ; and his 

 experiments on the electrical magnetic condition of metalliferous 

 veins, and also on the electric conditions of various ores to each 

 other, seem to have supplied an answer, in as much as it was thus 

 proved that electro-magnetism was in a state of great activity under 

 the earth's surface; and that it was independent of mere local action 

 between the plates of copper and the ore with which they were in 

 contact, was shown by the occasional substitution of plates of zinc 

 for thoge of copper producing no change in the direction of the vol- 



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