300 Bibliography. 
We have received for distribution from the author, a supply of 
prospectus with specimen plates, and also several copies of the fi 
them (post paid) to the address of B. Silliman, Jr: We have befo: € 
mentioned that M. D’Orbigny, was desirous of procuring the works of 
all American writers on geology, and well labelled suits of fossils fro 4 
our several formations. For these he will make an equivalent in ar 
By the kindness of the author we have received a copy of several o f 
his most important works, beside the foregoing. 3 
4, Legons de Géologie Pratique, tome premier, Paris, 1845, 8yo, 
inaries, descriptions of instruments, mode of observation, collection 
and preservation of specimens, i he lecturer commences with 7 
the loose material of the surface, the sands of the deserts and the sea. 
He then considers the phenomena of low lands in all parts of the globe, 
the mouths of rivers, and the great deltas of the Nile, Ganges, and 
oo with which the eleventh lecture closes. The work will be 
in three similar volumes, of which the third is announced 
for August of this year. 
5. Works of M. Agassiz.—We are favored with the continuation ae 
several bf the publications of this. industrious author, whose works.are 
not more numerous than mee are excellent. We notice the following 
for the first time :— 
(1.) Matériaux pour servir 4 une énumération aussi compléte que 
possible des papies 4% publiés sur Vhistoire naturelle, dés les temps les 
plus anciens jusqu’ a ce jour, et que je me propose d’éditer plus tard 
sous le titre de Bibliothéque Zoologique et Paléontologique. 
- This is an alphabetical list, in folio, of authors and woes in all de- 
+k aiiaent: eat aietee iology the 
% 
partments of zoology, general an 
study of fossils, geology, all monioiviior on chemistry and shiphiasied “which 
have any bearing on physiology or relate to the structure of the globe. 
The sheets now issued of this gigantic undertaking are 282 in number; 
forming a ponderous folio, with a single column of letter press and @ 
wide margin for additions. ‘This issue is distributed by the author to 
shoe who este aid him i in ee to fill up and complete this great 
