74 
by two setse or spines ; the second and third pair exactly 
resemble each other, but are very different to the second 
and third pair figured in Mr. Goodsir s diagram. He makes 
all three pairs exactly alike: mine have the second and third 
pair birfurcated ^at their extremities. The higher birfur- 
cation is terminated by a large seta, and there are also three 
setae arranged along the lower edge of the last joint; the 
lower birfurcation has two large setae at its extremity. 
My specimens, moreover, have only one pair of setae at the 
extremity of the body. These are not strong hooked spines 
as Mr. Goodsir shows them, but flexible hair-like setae. 
The difficulties of keeping these creatures alive for any 
length of time, make it almost impossible to trace their 
development further, but I was very pleased to be able to 
carry my observations so far, and to find that to so large an 
extent they confirm the description given by Mr. Goodsir. 
Mr. Alfeed Beothers, F.R.A.S., read the following note 
on “ Microscopic Writing ” : — 
The Lord’s Prayer has always been a favourite subject 
for testing the powers of minute caligraphy. To write the 
227 letters within the space covered by the smallest coin is 
a feat of some difficulty, but that the same number of letters 
can be engraved on glass within a space so minute as to be 
almost invisible with the lowest power of the microscope, 
and the individual letters not defined clearly with an 
eighth object glass, may seem incredible. There is, however, 
in the possession of this Section a slide which contains the 
Lord’s Prayer, written by W. Webb in 1863, within the 
space of the 405,000th part of an inch. To find this minute 
speck requires the exercise of much patience, as it is not only 
necessary to have just the right kind of illumination, but 
the focus of the lens must be on the true surface of the glass 
on which the object is written. When once seen with a low 
power it is not difficult to find with the same power; but 
