156 Canadian Record of Science. 
ferentially was not pathological as now suggested by 
Blake), but ‘a simple depression in the apex of the prickle 
of no physiological importance.’ (Proceedings Bot. Soe. 
Edin., November, 1855, on the structure of Victoria Regia, 
Lindl. By George Lawson.) In the same paper it was 
shown that the stomatodes or perforations of the leaf were 
not mere holes, caused by insects, as argued by Trecul, and 
accepted on his statement by Blake, but special structures 
of uniform size, formed by surrounding modified cells, and 
comparable with the more complete reductions of parenchy- 
matous tissue seen in submerged plants and in Ouvirandra 
fenestralis ; moreover their special function in Victoria was 
indicated. 
‘““A statement is given of the historical facts connected 
with the nomenclature of the Nympheacee, with regard to 
the proposal recently made by some American and English 
botanists to give up the generic name Mymphea to the 
group now well known as Nuphar, and to re-instate Salis- 
bury’s name Castalia for the true Water Lilies. The paper 
also contains a synopsis of species. 
“A series of coloured drawings illustrated the minute 
structure of the Victoria. These were made from a plant 
that flowered in the autumn of 1851, in the nursery of 
Knight & Perry, King’s Road, London, and another grown 
in the Botanic Garden, Glasgow, in 1855. They show the 
epidermis and stomata—the latter with chlorophyll granules 
—of the upper surface of the leaf; the surface cells, hairs, 
and base hairs, of the lower surface; the prickles, in several 
aspects and sections, showing internal tissue, ostiole, &c. ; 
the air spaces of the leaves, with the large stellate pro- 
cesses projecting into them sculptured with bead-like mark- 
ings as in diatoms; colour-cells of the lower surface; 
stomatodes, or perforations, surrounded by oblong cells 
filled with deep rose-coloured contents; surface petal-cells, 
with crimped cell-walls and filled with rosy colouring mat- 
ter, of varying depth of shade.” 
