394 PROCEEDINGS OF THE SECTIONS. 
Monthly mecting 13th June 1892. 
Mr. P. R. Peptey in the Chair. 
Dr. W. Morris exhibited Powell & Lealand’s oth inch apo- 
chromatic objective of 1:5 numerical aperture, showing anthrax 
and cholera bacilli and the podura scale. 
Mr. P. N. Treseck exhibited a dipping from Port Jackson in 
the neighbourhood of Milson’s Point, the water at the time of 
taking having been highly phosphorescent. 
Dr. H. G. A. Wricut exhibited a series of photographs show- | 
ing the arrangement of suckers on the pseudo-trachee of the 
tongue of the blowfly. 
Mr. S. MacDonnett exhibited a current-slide for observing 
growth of minute aquatic life. 
Monthly meeting 11th July, 1892. 
Mr. P. R. Peptey in the Chair. 
Mr. G. D. Hirst exhibited a couple of positive eye-pieces 
mounted on handles. 
Dr. H. G. A. Wriaut exhibited photographs of Isthmia nervosa 
and J. enervis. 
Monthly meeting Sth August, 1892. 
Dr. H. G. A. Wricut in the Chair. 
Dr. Wricut exhibited a series of photographs illustrating the 
transverse markings on the difficult test diatom ‘‘ amphipleura 
pellucida” taken with Powell & Lealand’s new 3; inch apochro- 
matic objective after an hour’s exposure. This duration gave a 
good result, which might have been improved had the exposure 
been still longer. The unaided eye is unable to see these faint 
strize with the magnification of the 34; inch—600 diameters—but 
photography has succeeded in fixing them on the sensitive plate. 
On behalf of Dr. Morris, Mr. 8S. MacDonnetu exhibited a 
somewhat rare fungus (Acidiwm bellidis), found on the green 
leaves of the common daisy. Also leaves of the marguerite and 
