102 NOTES AND MEMORANDA. 
which is attached, by means of a rubber ring, a wide-mouthed bottle. 
Any quantity of water may be poured into the bag, and all the objects 
which it contains will roll down the sides of the bag and fall into the 
bottle, while the fluid escapes through the sides. Delicate objects 
are consequently not exposed to pressure, rubbing, or any other 
violence, as they would be in an ordinary filter or bag, and the whole 
affair is so simple that anyone can make it.” 
How to resolve Test-diatoms without any Special Apparatus.— 
The Rev. J. Bramhall writes as follows to ‘ Science-Gossip ’ (January 
1877), and as he is an authority on the subject, we think his remarks 
worthy of quotation :—“ Turn the instrument at right angles to the 
sun; close the diaphragm so as to cut off all light below the stage ; or, 
if that cannot be done, place a piece of black paper behind the slide. 
Bring the light on to the object at the angle which suits it best. This 
is easily done by moving the microscope to the right or left. If 
necessary, increase the light by the use of the stage or stand bull’s- 
eye condenser. That is all. A black ring round the covering glass 
is an objection when the cover is small, as it interferes with the light. 
To carry out this plan successfully, only two things are necessary— 
viz. the sun, and an object-glass, capable of resolving the test, just 
before it. It is not intended to supersede the use of the apparatus, 
for the sun is far too uncertain an illuminator to be depended upon, 
and most men work by night; but it may be useful to those who 
cannot afford to purchase any apparatus—not even an oblique illu- 
minator, the cheapest of all. I must justify this allusion to my pet 
child by stating that I have not, and never have had, any pecuniary 
interest in its sale. Having been asked questions as to its capabilities, 
I can only repeat what I have before stated, viz. that by its help I 
can resolve tests which I never could touch before, though possessing 
achromatic condensers, spot lens, &c.” 
A new Locality for Amphitetras antediluviana.—Mr. E. D. Mar- 
quand states that in the number of ‘Science-Gossip’ for December 
1867,* Mr. F. Kitton contributed a valuable paper on the genus 
Amphitetras, and amongst others, described this species, together with 
two varieties of it: 8, with sides deeply incurved, and angles much 
produced ; and y, with five incurved sides. Of the latter (which is 
figured) Mr, Kitton remarks: “ This variety appears to be rare, as I 
know of only one locality in which it has been found, viz. Hayling 
Island, Hants, in which it was rare.” Mr. Marquand has seen no 
record of the occurrence of this beautiful diatom elsewhere, and 
therefore has much pleasure in adding a second locality, also in 
Hampshire, viz. Lymington. A few weeks ago he collected material 
from two places, the shore of the Solent below South Baddesley, 
exactly opposite Yarmouth; and the bank of the river facing Lym- 
ington. The first gathering yielded Amphi. antediluviana, var. B, in 
great abundance, but without the typical form; the second produced 
var. 6 in less numbers, sparingly intermixed with var. y. 
* Vol. iii. p. 271. 
Tee 
