192 
without any apparent effect on the Coccoliths or Coccospheres. 
Close by, but detached from the Textularia here figured, are 
several perfect Coccospheres, by means of which a ready 
comparison and proof of the identity of the cells of the 
Foraminifer with them can be obtained.’ ” 
“ These are the facts, so far as they have as yet fallen 
under my observation. It remains for future more extended 
inquiry to determine with certainty their true significance.” 
The following notes also refer to the Coccoliths : 
“ I may repeat here, what I announced cursorily in a paper 
on the Polycystina, read by me on the 10th May, 1865, 
before the Microscopical Society, and published in the 
‘ Transactions ’ for that year ; that I had also discovered 
Coccoliths in the Barbadoes and other fossil eai’ths ; and 
Coccospheres as free-floating organisms in tropical seas. 
Towards the close of the same year, I again found them in 
abundance in the British Channel. 
“ In my previously published observation on the nature of 
the c oozy ’ deposits of the Atlantic, I have dwelt on the 
striking difference in character that exists between the im- 
mediate surface-layer of the sea-bed, and the stratum be- 
neath ; and have pointed out why all living animal structures 
must necessarily be confined to this surface-layer. Although 
it is now too late to put the matter to the test — and a de- 
cisive opinion on the subject can only be formed by an 
analysis of the deposits the moment they are obtained — it 
would seem probable that the preponderance of perfect 
structures, as compared with their exuviae or debris, is to be 
accounted for on the supposition that, inasmuch as the 
former occur on the surface, whilst the latter become the 
sub-stratum, this preponderance when observable under the 
microscope, presents itself as a portion of the surface-layer 
or the sub-stratum happens to be examined. It is quite 
certain, morever, that even in the case of the preserved 
specimens of deep-sea deposits, portions picked out from 
different levels present different relative quantities of these 
and other structures also. 
“ As will be shown on a future occasion, some of the free- 
floating Coccospheres are oblong. It may be mentioned 
also that although 1 have here noted r th of an inch as the 
largest observed size, very much larger specimens must in all 
probability exist, inasmuch as I possess mounted specimens 
of Coccoliths which themselves measure g-g-gTh of an inch 
across their longest diameter.” 
Dr. Wallich objects to the establishment of a new grade of 
