242 
PROCEEDINGS OF THE SOCIETY. 
Tho following bibliography on this subject might be useful. 
H. J. Slack. On Eupodiscus Argus. Monthly Micro. Journ., 
vol. viii. (1872) p. 256. (Erroneous bead theory — E. M. N.) 
W. Puinz. Diatoms in Thin Rock Sections. R. M. S. Journ., ser. 2, 
vol. i. (1881) p. 507 ; and vol. ii. (1882) p. 246. 
Dr. Van Ermengem. Diatoms in Jutland “ Cement-stone.” R. M. S. 
Journ., ser. 2, vol. iii. (1883) p. 411. 
Dr. J. H. L. Flogel. Diatom Sections. R. M. S. Journ., ser. 2, 
vol. iv. (1884) pp. 505 and 665, pi. 8 to 11. 
(Dr. Flogel’s observations with regard to coarse structures were most 
valuable, but his “microscopy” was very defective, and his conclusions 
as to the nature of the fine structure were quite untrustworthy ; his work 
appeared to have been done with a narrow cone.) 
H. Morland. Diatom Structure. Q. M. C. Journ., ser. 2, vol. ii. 
(1886) p. 207. 
J. Debey. Diatom Structure. Q. M. C. Journ., ser. 2, vol. ii. (1886) 
p. 308. 
The thanks of the Meeting were unanimously voted to Mr. Keeley 
for his communication. 
The President said, before he sat down, and whilst they were on the 
subject of diatoms, perhaps they would allow him to direct their attention 
to a very interesting discovery of Mr. Morland’s with regard to the 
bracket which strengthens the “ plate ” in Arachnoidiscus (published in 
the paper just quoted). Mr. Morland found that this bracket was 
nothing more nor less than that which an engineer would call a bead- 
headed girder. Engineers, no doubt, thought that they had made a 
great discovery when they had invented the T girder and the bead- 
headed rail, but in truth these were only a copy of something that 
Nature had already accomplished in the strengthening girders of an 
Arachnoidiscus. 
The President said that Mr. Curties had brought for exhibition some 
photomicrographs by Mr. W. C. Rowden, of 66 Warrington Road, 
Newcastle-on-Tyne. He hoped the Fellows would give them a careful 
examination, as they were excellent photomicrographs of critical images. 
The blow-fly’s tongue and tho Eunotia were very charming, and were 
perhaps the best examples he had seen. He was sorry to say that a 
great deal of the so-called critical photomicrography of the present day 
was anything but critical, for it was often the work of men who, while 
talking and writing glibly enough about critical images, had never even 
seen a critical image, much less had photographed one. 
The Secretary said another paper had been received from Mr. 
Millett, being Part IV. of his series of papers on the Foraminifera of the 
Malay Archipelago. This paper, like those which preceded it, would 
be of great value for reference, but was too technical for reading in ex - 
tenso at the meeting. It would therefore be taken as read, and printed 
in the Journal. 
