CONTENTS. 



ORIGINAL COMMUNICATIONS. 

 I. On the British Species of the Genus Cerastium, being an attempt 

 to elucidate their distinctive characters. By Charles C. Ba- 



BLNGTON, M. A. F. L. S., &C. - _ p a ,r e I97 



II. Characters and Descriptions of the Dipterous Insects indigenous 



to Britain. By James Duncan, M. W. S., &c. &c. Continued, 205 

 j III. On the existence of a second membrane in the Asci of Fungi. By 



the Rev. M. J. Berkeley, M. A. F. L. S., - t 222 



IV. Observations on the Gemmse of Bryum androgynum. By George 



Dickie, Esq. Surgeon, Aberdeen, - . 226 



V. On a peculiar structure in Shells ; with some observations on the 



Shell of Spheerulites. By John Edward Gray, F- R. S., &c. 228 



VI. Localities of Scottish Coleoptera. By the Rev. Willtam Little, 232 



REVIEWS AND CRITICAL ANALYSIS. 

 Manuel de Malacologie et de Conchyliologie. Par H. M. Ducro- 



TAY DE BLAINVILLE. 



Manuel de l'Histoire Naturelle des Mollusnues et de leur Coquilles. 

 Par M. Sander Rang. 



The Genera of Recent and Fossil Shells ; for the use of Students in 

 Conchology and Geology. By George Brettingham Sowerby. 



The Elements of Modern Conchology ; with Definitions of all the 

 Tiibes, Families, and Genera, Recent and Fossil. For the use of 

 Students and Travellers. By William Swainson, Esq. 



Elements of Conchology, according to the Linnaean System, illus- 

 trated by 28 plates drawn from Nature. By the Rev. E. I. Bur- 

 row, A. M. F. L. S., - . . 238 



bibliographical notices. 



auna Japonica. Auctore Ph. Fr. De Siebold Ophidii elaborantibus 



C. J. Temminck et H. Schlegel, - 266 



Synopsis of the Birds of Australia and the adjacent Islands. By John 

 Gould, F. L. S. Part II., - - . 266 



atalogue of the Cellulares or Flowerless Plants of Great Britain, or those 

 included in the Linnoean class Cryptogamia ; compiled from Sir W. J. 

 Hooker's English Flora, Vol. V. ; Sir J. E. Smith's English Flora, Vol. 

 IV. ; Mackay's Flora Hibernica; Henslow's Catalogue of British Plants, 

 and other sources. By W. A. Leighton, B. A. F. B. S. Ed., - 267 

 History of British Birds, Indigenous and Migratory, including their orga- 

 nization, habits, and relations, remarks on Classification and Nomencla- 

 ture ; an account of the principal Organs of Birds, and observations re- 

 lative to practical Ornithology. Illustrated by numerous engravings. By 

 Willtam Macgillivray. Vol. I. - 267 



