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, v ;;> i . . . 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 SEVAN, M. D. 57 
VII. On the Genus Paradoxornis. By J. GOULD, F. L. S., &c. n* .-> 62 
VII I. 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, . .7 . . . 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. . . ; ^-i.arf. v. ,. :-,+ :,] I/ ' 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 
