266 Analj/tical Notices of Books, 



In Entomology the only article is entitled ^' Descriptions of 

 new Hemipterous Insects collected in the expedition to the Rocky 

 Mountains," by Mr. Say. The number of species described is 

 about fifty ; but it is proper to remark that Mr. Say adopts the 

 Linnean definition of Hemiptera^ and thus confounds under one 

 order insects referable to the two classes, Mandibulata and 

 Hausieliata; for instance Gryllus^ Pentatoma^ and Cicada. The 

 species are all referred to established genera, and appear to pre- 

 sent no striking peculiarities. 



The only remaining papers connected with Zoology are the 

 *' Description of a new species of Trilohite^'' by Dr. Bigsby ; and 

 observations '' On two genera and several species of Crinoidea^"* 

 by Mr. Say. The latter has already been given entire at page 

 311 of our second volume, together with some valuable additions 

 from the pen of Mr. G. B. Sowerby. Of the former we have 

 only to remark that it is referable to the genus Paradoxus of 

 Brongniart, and that it was discovered in limestone above the 

 saliferous sandstone, and consequently in a more recent forma-* 

 tion, than the rocks best known as abounding in Trilobites, 



Voyage autour du Monde^fait par ordre du Roi^ sur les Corvettes 

 VUranie et la Physicienne^ pe?idant les Annees 1817, 1818, 

 1819, et 1820, par M, Louis de Freycinetj Capit. de 

 Vaisseauy Sfc. 



Partie Zoologique ; par MM- Quay et Gaimard, Medecins de 

 VExpedition. Livraisons i. — xiii. 4to Planches coloriees 

 Ixxviii. Folio. 



In the letters of M. Arago, and in the numerous extracts and 

 notices contained in the various Journals, the outlines of the 

 Voyage round the World, undertaken by the orders of the French 

 government in the years 1817, 1818, 1819, and 1820, have been 

 SO repeatedly given as to have become familiar to every reader. 



