CONTENTS. 



Page 



Art. XL, The generic and specific Characters^ Sfc, of 

 Ophidian^ Cheloniany and Batrachian Reptilia, disco- 

 vered by M, Spix in Brazil 329 



Art. XLI. On the Genus Psaris of M. Cuvier, with an 

 Account of two new Species. By William Swainson^ 



Esq, F.R,Sf L.S. 354 



Art. XLII. On the Isocardia Cor of the Irish Seas. By 



the Rev, James Bulwer^ F,L.S., 8fc 357 



Art. XLIII. Description of some new British Shells; 

 accompanied by Figures from the original Specimens. 



By Dr. TuRTON 361 



Art. XLIV. Sketches in Ornithology ; or^ Observations on 

 the leading Affinities of some of the more extensive groups 

 of Birds. By N. A. Vigors, jun. Esq. M,A, F,L,S,, 368 



On the Groups of the Vulturidce 368 



On a new Genus of Falconidce 385 



On a new Genus of Psittacidce 387 



On the Arrangement of the Genera of Birds 391 



Art. XLV. Analytical Notices of Books : — 



Cuvier^s Animal Kingdom by Griffith 406 



Curtis^ s British Entomology 408 



Journal of the Academy of Natural Sciences of Phila- 

 delphia c . 410 



Histoire Naturelle des Mammiferes, Sfc 415 



Memoir es du Museum d^ Histoire Naturelle 424 



M. Latreille^s Families Naturelles du Regne Animal . . 427 

 M (inner heini's Monograph of the Genus Eucnemis .... 430 

 Meigen's Systematic Description of the known Dipterous 



Insects of Europe 431 



