Vlll CONTENTS. 



Page 

 On a Venomous Fly of Southern Africa, by MM.W.OswellandAmaud ; 

 Experimental Researches upon the Temperature of Reptiles, and 

 on the modifications which it undergoes under various circum- 

 stances, by M. Aug. Dumeril ; Late appearance of the Swallow, 

 by G. Bryant; Meteorological Observations and Table ... 463 — 466 



Index 467 



PLATES IN VOL. X. 



yj' y Nervous System of Ommastrephes todarus. 



III. Reproduction of the Campanulariad£e. — Structure of Doliolum. 



IV. Form and Structure of the Shell of Operculina Arabica. 



V. New species of Clionites. — New species of Belemnite. — Hippo- 



lyte Barleei. — Atelides centrolineatus. 

 VI. Structure and Development of Stephanosphsera, a new genus of 

 the Volvocinese. 



ERRATUM. 

 Page 351, line 11 from top, /or 1844 read 1849. 



