13-1 Proceedings of the Royal Pliy steal Sociefy. 
zoophytes the vit-ellus never divided ; it became minutely granular and 
opaque without segmentation. Still, some intermediate form might occur 
even within the egg. The male of this Lizzia might differ in form or 
development from the female, as was the case in the medusoids of 
Atractylis (Eudendrium) ramosa, and Campanularia dichotoma 
(Love7ii). It was well known that although in some zoophytes the re- 
productive apparatus of the male and female was identical in shape, in 
others the difference was very remarkable. 
II. Note on an Instantaneous Method of finding Microscopic Objectg 
under High Powers. By T. Strethill Wright, M.D. 
The author stated, that when examining small living organ- 
isms under pressure, he had frequently much difficulty in 
placing them under the higher-powered objectives with suffi- 
cient rapidity. The animals often commenced breaking up 
before they could be found. By adopting the following 
method of finding objects, he could instantly, and without even 
looking through the body of the microscope, place in the centre 
of the field, and in focus, any object which could be barely 
detected by the naked eye. 
The fine adjustment slide was marked by a small scratch 
on the brass-work, and it was afterwards not used. A speck 
of paper or other substance, sufficiently large to be just per- 
ceptible to the naked eye, was placed in water on a glass slide, 
covered with thin glass, placed in the centre of the field, and 
accurately focussed under the high-powered object-glass. The 
coarse adjustment was then marked by a scratch on the body 
of the instrument or the slide of the rack (" scratch No. 1"). 
The operator then placed the point of his nose on the top of 
the coarse adjustment screw-head, and the left side of his 
forehead against the projecting rim of the eye-piece, and 
looked towards the object with the right eye. The object 
was hidden from the eye by the body of the microscope. The 
body of the microscope was then raised by the coarse adjust- 
ment until the object again just came into view, emerging 
from behind the convex rim of the objective. This point of 
adjustment was then marked (" scratch No. 2"). The operator 
had thus four adjusted points : first, the tip of the nose ; 
second, the side of the forehead ; third, the most convex part 
of the rim of the objective ; and fourth, the object. The 
three first of these adjusted points were permanent, while the 
