Bibliographical Notices. 387 
expanded as they are in that specimen, neither are they quite 
so large. The degree of “ cuppiness”’ in this coral appears, 
however, to be directly dependent upon the character of its 
environment. Where the bottom is hard and free from mud, 
then will the calyx be deep, but where (as is the case in 
many parts of the Straits, and notably at the spot where the 
‘Challenger’ specimen was obtained) the bottom consists 
largely of soft mud the coral will then be more or less flat- 
tened out. This modification is, of course, only what we 
might, a priori, expect to occur; for if a coral living on mud 
had a deep cup, this would very soon become filled with 
sediment. So far as my experience goes, mud is the greatest 
enemy a coral has to dread, and one frequently finds special 
adaptations to enable it to exist on muddy ground. ‘Thus, 
specimens of Turbinaria from muddy bottom often present a 
convex upper surface instead of possessing the normal cup- 
shape, or one side of the cup may be notched or hollowed out, 
or, again, the cup may be perforated at its base in order to 
enable the mud to escape, and thus to prevent the clogging 
of the coral, 
It is not my intention here to enter further into a considera- 
tion of the morphology and relationships of Moseleya, as the 
elucidation of these questions will, I hope, be undertaken at 
the much more competent hands of Mr. H. M. Bernard. 
BIBLIOGRAPHICAL NOTICES. 
Die Mimik des Menschen. By Henry Hueuss. Frankfurt-a.-M.: 
Johannes Alt, 1900. Pp. xi, 423. 
Srupents of psychology should extend this treatise a hearty welcome. 
It is comprehensive in its scope, and the various sections are 
skilfully condensed, yet so as to lose nothing for the sake of brevity. 
The book is divided into five sections or chapters, and these again 
are subdivided into smaller sections, thus facilitating reference. 
What seem to be omissions are probably intentional on the part 
of the author. Sub-section V. of Section II. is historical in character, 
and claims to be a phase of the subject hitherto untouched. We 
quite agree with the author that the attitude of caution should be 
ours when drawing conclusions from purely lay-sources relative to 
incidents of animal instinct and expressions of the emotions. We 
wish that this section—-the section, moreover, most likely to interest 
readers of this journal—had been more fully treated. 
The illustrations certainly leave much to be desired: for the 
most part they have been drawn from other works; some of them 
are old, and none of them are beautiful. They are unworthy of the 
rest of the book. 
