CONTENTS. 



ORIGINAL COMMUNICATIONS. 



No. I. 

 I. Some Remarks on the Study of Zoology, and on the present state of 

 the Science. By the Rev. Leonard Jenyns, M. A. ; F. L. S. ; F. 

 Z. S. ; &c. . ... . . Page 1 



II. On the Disunion of contiguous Layers in the Wood of Exogenous 

 Trees. By Rev. J. S. Henslow, M. A. Professor of Botany in 

 the University of Cambridge, ... 32 



III. The Natural History of the British Entomostraca. By William 



Baird, Surgeon, . . . 35 



IV. Notices of British Fungi. By Rev. M. J. Berkeley, M. A. No. 1. 42 

 V. Contributions to the Ichthyology of the Firth of Forth. By R. Par- 



nell, M. D. No. 1. 50 

 VI. The Honey-bee community. Length of life allotted to its different 



members. By Edward Bevan, M. D. 57 



VII. On the Genus Paradoxornis. By J. Gould, F. L. S., &c. . 62 



VIII. The Natural History of British Zoophytes. By George Johnston, 



M. D., Fellow of the Royal College of Surgeons of Edinburgh, 64 



No. II. 

 I. On the requisites necessary for the advance of Botany. By the Rev. 

 J. S. Henslow, M. A., Professor of Botany in the University of 

 Cambridge, . . . ' . 113 



II. Observations on the Digestive Organs of Birds. By William Mac- 

 gillivray, A. M., F. R. S. E., M. W. S. Conservator of the 

 Museum of the Royal College of Surgeons of Edinburgh, . 125 



III. Botanical Notes. By Charles C. Babington, M. A. F. L. S. &c. 136 



IV. The Characters of two new Genera of South African Reptiles, with de- 



scriptions of species belonging to each. By Andrew Smith, M. D., 

 M. W. S., &c. . . . . 141 



V. Characters and Descriptions of the Dipterous Insects indigenous to Bri- 

 tain. By James Duncan, M. W. S., &c. &c. . 145 

 VI. Notice of the Lutjanus rupestris of Bloch. By P. J. Selby, Esq. 



F. R. S. E.,&c. . . . . .167 



VII. Observations on some circumstances attending the process of Exuvia- 

 tion in Shrimps and Lobsters. By Jonathan Couch, F. L. S. 170 



No. III. 

 I. On the Natural History and Relations of the Family of Cuculidae or 

 Cuckoos, with a view to determine the series of their variation. By 

 William Swainson, F. R. & L. S. &c. . . 213 





