Vol. 63. 



May 1824. 



No. 313. 



m 



E3 



Published the Last Day of every Month. — Price 2s. 6d. 



THE 



PHILOSOPHICAL MAGAZINE 



AND JOURNAL: 



COMPREHENDING 



THE VARIOUS BRANCHES OF SCIENCE, 



THE LIBERAL AND FINE ARTS, 



AGRICULTURE, MANUFACTURES, 



AND COMMERCE. 



NUMBER €CCXIII. 

 For MAY 1824. 



WITH A PLATE 



Containing two new Species of Ascidia; and Amphiuma means, 



a new Batrachian Animal. 



By ALEXANDER TILLOCH, LL.D. 



M.R.I. A. F.S.A. EDIN. AND PERTH; CORRESPONDING MEMBER OP THE ROYAL 



ACADEMY OF SCIENCES, MUNICH; AND OF THE ACADEMY OF SCIENCES, 



LITERATURE AND ARTS, LEGHORN, ETC. 



And RICHARD TAYLOR, F.L.S. 



MEMBER OF THE ASTRONOMICAL SOCIETY OP LONDON, AND OF THE ASIATIC SOCIETY 

 OF GREAT BRITAIN AND IRELAND. 



LONDON: 



PRINTED BY RICHARD TAYLOR, SHOE-LANE : 



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