CONTENTS. 
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PAGE 
mar. I. Biographical Notice of Marie-Henri Ducrotay de 
Blainville, de l’Academie des Sciences, Pro- 
_ fesseur Administrateur au Museum d’ Histoire 
Naturelle, Professeur 4 la Faculté des Sciences 
de Paris; de la Societé Royale de Londres, 
&. &. By M.FLourrens, .. . . 193 
‘iI. Extraordinary Fishes from California, constituting 
a new Family. Described by L. Agassiz, 
Professor of Zoology and Geology in the Law- 
rence Scientific School at Cambridge, Massa- 
chusetts, . ; ‘ L ;- 214 
III. Experiments on the Dyeing Properties of Lichens. 
By W. Lauper Linpsay, M.D., Assistant Phy- 
sician, Crichton Royal Institution, Dumfries. 
Communicated by the Author, ‘ . 228 
IV. The Old World Compared with the New World. 
By M. Marcer ve Serres, Professor of Mi- 
neralogy and Geology at Montpellier, . 250 
