20 
specimens were again met with at Leigh Woods. Again in 1859 several 
specimens were captured by the author and by Mr. C. Butler, thirteen, 
altogether. The species had not been met with since, though constantly 
looked after, and not having occurred elsewhere, might be claimed as pe- 
culiarly a Bristol species. 
CHEMICAL AND PHOTOGRAPHIC SECTION. 
Wednesday, February 13th, 1 86/.— The attendance of members 
was so small that the meeting was adjourned for a month, until March 
13th ; and it was announced that a paper on Disinfection would then be 
read by the Hon. Secretary of the Section, Mr. Alfred Noble, F.C.S. 
ZOOLOGICAL SECTION. 
Thursday, February 14th, 1867. — Mr. Thomas Pease, Vice- 
President of the Society, in the Chair. 
Being the adjourned Annual Meeting, a summary of the proceedings of 
the past year was read and the audited accounts were presented, showing a 
balance in favour of the Section of £2 7s. 7d. 
Dr. Fripp was re-elected President, and Mr. S. H. Swayne, Secretary 
of the Section for the ensuing year. Tt was resolved to purchase vol. I 
of Giinther's Zoological Record, to present it to the Society's Library. 
Mr. Leipner read (for Mr. Ponton) the following paper by Mr. T. Graham 
Ponton, on the Classification of Fishes, with especial reference to the form 
of the scale as a means of determining genera. 
" The classification of Fishes has always been a matter of great interest, and 
from the many difficulties connected with their anatomy, they have proved a fruit- 
ful field for the exercise of the ingenuity of Naturalists. 
I propose this evening to consider very shortly the merits of the various different 
modes of classification, which have been from time to time proposed by various 
authors ; confining myself, however, entirely to the osseous fishes. 
Four different systems, namely those of Cuvier, Agassiz, Giinther, and Owen, 
are up to the present pre-eminently in vogue with naturalists ; although others 
have been proposed and to some extent adopted. 
The first is that of Cuvier, or rather the modified form of his original scheme, 
which has of late been employed. This system, although to some extent con- 
venient, is in many respects artificial, more especially the subdivisions of the 
Order Malacopterygii. 
The next, that of Agassiz, although very convenient for the identification of 
fossil fish, for which purpose it was originally intended, fails when applied even in 
