Scientific Reviews. 309 
order, generally speaking, belongs, according to Lamouroux, to the Temperate 
Zones ; and in this conclusion I think he is-correct. But, as might be antici- 
pated, in an order which contains so large a number of genera and species, there 
are many exceptions. The genus Amansia is exclusively tropical. Hypnea 
and Acanthophora belong also, rather to the tropical than the neighbouring zones. 
It is worthy of notice, that, comparatively speaking, the southern temperate zone’ 
contains much fewer FLoRIDE than the northern : a fact that Lamouroux thinks 
may be accounted for by the inferior extent of the temperate zone in that hemi- 
sphere. 
*< From the number of species known to Lamouroux, he calculated that the 
FLoRIDE# predominate yreatly over the FucorpE#; the latter over the UL- 
VACE#, and these last again over the DicrvorEa. He estimated the number 
of species known to botanists (including the articulated Alge) to be 1600, which 
is certainly considerably exaggerated. The total amount of species supposed to 
exist was conjectured by the samé‘author to be at ieast five or six thousand. If 
this be an approximation to the truth, we cannot be said to be well acquainted 
with a fifth part of the subaqueous vegetation of the globe.” 
This extract will give an idea of our author’s style, which is 
always chaste and sometimes eloquent, to which we further add, 
that the remarks on each species, which, with the descriptions, are 
in English, contain a degree of interest which it would have been 
thought impossible to throw over productions. to which so little ge- 
 neral attention has been paid, and whose history was so imperfect- 
ly known. It was the author’s intention, when he first began col- 
lecting the materials of this work, to have followed the arrange- 
ment of Professor Agardh ; but in the’ course of his investigation 
of the habits and structure of species, he was naturally led to make 
many alterations in this arrangement. Several new genera have 
accordingly been admitted into this synopsis, which our space will 
not allow us to delineate, and for their accuracy Dr. Greville’s name 
must to our readers be a sufficient warrant. The work is also ac- 
companied with plates, in each of which several figures, mostly from 
drawings by the author, and sketches of parts, or illustrations of 
genera and species, are introduced. We have no doubt that the 
work will meet with the approbation of all classes ef readers ; but 
from the student in botany Dr. Greville is entitled to every eulogy; 
and to the warmest expressions of gratitude. 
4 
Elements of General Anatomy. Translated from the French of 
P. A. Béclard. With Notes and Corrections by RopErt Knox 
M.D. F.R.S.E. Lecturer on Anatomy, &c. Edinburgh. Mac- 
lachlan & Stewart. 1830. 
Elements of General Anatomy, containing an Outline of the Orga- 
nization of the Human Body. By R. D. Graincer, Lecturer 
on Anatomy and Physiology. London. Highley. 1829. 
Iris but a very short time since there existed any book in the 
English language dedicated exclusively to the subject of General 
Anatomy. 
