REVIEWS. 
9 
these papers, Mr. Lawson confirms Mohl’s view of the colouring matter in 
S. reginae—viz., that the blue colour of the flower is not diffused colour, 
but appears in the shape of spherical granules; and that in the yellow 
leaves the pigment has, as Mohl expresses it, the form of slender, crescen- 
tically-curved, and irregularly-wound fibres, which swim in the cell sap. 
Mr. Lawson adds, that it, however, occasionally occurs in globular bodies. 
In the latter paper we have a very careful and detailed account of the 
occurrence of Cinchonaceous glands on the interpetiolar stipules of the Gali- 
acese. Hitherto these glands were considered quite peculiar to the natural 
order Cinchonaceae, and have even been employed as a character to distin¬ 
guish that order from Galiacese. However, Mr. Lawson has discovered that 
they are present in every plant of the order he has examined—amounting, 
on the whole, to no less than twenty-seven species—and, we think, he may 
fairly conclude their general occurrence in the order. The paper concludes 
with reviewing the reasons for keeping those two orders separate. Both 
these papers are of exceeding interest to botanists, and we are glad to see 
them published in a separate form. 
The Sea-weed Collector’s Guide. By J. Cocks, M.D. With a Plate, 
coloured. Price 2s. 6d. London: John Van Voorst. 1853. 12mo. 
Pp. xvii., 120. 
We have in these pages a really useful, because practical, guide for the 
collector of our Marine Algae, and which we feel will be gladly welcomed 
by all who admire the elegant varieties of form to be met with in this 
most interesting and beautiful order. We can remember how gladly we 
would have hailed such a manual when, for the first time, we endeavoured 
to preserve some of our favourites for future examination, and saw how far 
our attempts were from keeping the characteristic features of those we 
were most anxious to preserve. With Dr. Cocks’s name British Algaeologists 
are already well acquainted; and few collections of our Algae, of any size, are 
to be found, in which specimens put up by him may not be recognised by 
their exceeding beauty and perfection ; and we only regret that their 
merits are not better known and appreciated. We, however, have some 
reason to hope, that in the course of the present year, Dr. Cocks will issue 
to subscribers, at a moderate price, sets of British Algae, arranged in 
fasciculi, in accordance with the Phycologia Britannica ; and we can scarcely 
conceive a greater boon to the student than such a companion to the noble 
Monograph of Professor Harvey, or one that would find a readier support 
from all who are attracted to our coasts in search of health and pleasure. 
