Biographical Notice of Alcide D’ Orbigny. 73 
his studies on the Crinoids, his “Prodrome de Paléontologie,” 
his “ Course of Stratigraphic Geology,” and especially his ‘ Palee- 
ontology of France,” which has extended to fourteen volumes, 
In doing so I shall principally confine myself to the notice of 
such works and opinions of DOrbi ny as affect materially either 
the Philosophy or the practice of geological science. Such 
Papers as his Monograph of the new genus of Gasteropods to — 
Which he gave the name Scissurella, or his description of two’ 
‘Species of the genus Pteroceras, found in the Jurassic limestone 
awe La Charente Inférieure, or his essav on the beaks of fossil 
SS 
vegtiopoda, in which he divides the Rhyncholites into two di- 
‘sions, belonging to different genera, one being the beaks of 
Nautili, and not of Sepice, as had been before supposed,—an idea 
Supp by the anatomical description, by Professor Owen, of 
D SERIES, Vor. —JAN. 1859. 
10 
XXVII, No. 79. 
