266 Anali/tical Notices of Books, 



In Entomology the only article is entitled " Descriptions of 

 new Ilemipterous 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 Jlemiptcra, and thus confounds under one 

 order insects referable to the two classes, Mandibidata and 

 JJaustellata ; for instance Gri/llus, 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 TrilubitCj^' by Dr. Bigsby ; and 

 observations " On two genera and several species of Crinoidca" 

 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. Sowcrby. 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 Rot, sur les Corvettes 

 VUranie et la Physicienne, pendant les Jnnccs -1817, 1818, 

 1819, et 1820, par J\]. Louis de Frej/cinet, Capit. de 

 Vaisseau, c^c. 



Pa7'tie Zoologique ; jyar MM. Quoij et Gaimard, Medccins de 

 VExpcdition. Livraisons i. — xiii. 4to Planches colorices 

 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 PVench 

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

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



