BOOK NOTICES 93 
BOOK NOTICES. 
THE RESOURCES OF THE SEA. By William Carmichael M‘Intosh, 
M.D., LL.D., D.S¢., F.R:S.; ete. 2nd Edition. Cambridge: 
at the University Press, 1921. Pp. xvit+ 352. Price 35s. net. 
The second edition of Professor M‘Intosh’s work on the food supplies 
of the ocean, as affected by the closure of certain areas off the Scottish 
shores, and by the continued destruction caused by fishing, contains in 
the bulk the observations of the original volume; but these he has 
supplemented and brought up to date by reviewing the mass of 
material accumulated in recent years through the International 
Fishery Investigations. In view of his own researches and of those 
of others, Professor M‘Intosh sees no reason to depart from his 
earlier tenet, his “perfect faith in the marvellous ways of Nature in 
the ocean, ways which enable her to cope, in regard to the food-fishes, 
with all the wonderful advances in apparatus for capture, and with the 
steady increase of population.” He holds to the views that no sound 
proof has yet been adduced to show that even the most. strenuously 
sought fishes are approaching extinction, that no fear need be felt 
for the serious diminution of marine food fishes, and that all well- 
conducted methods of capture should be free from unnecessary 
restrictions. The work of this pioneer of fishery investigations will 
long remain the text-book of those who share the views he has so 
long and so vigorously upheld. 
THE GROWTH AND SHEDDING OF THE ANTLER OF THE DEER. 
By William MacEwen, F.R.S. Glasgow: MacLehose, 
Jackson & Co., 1920. Pp. xvii+1og. Price ros. 6d. net. 
Sir William MacEwen’s study of the cell changes which account 
for the curious story of a deer’s antler, cannot fail to appeal to 
naturalists. He is mainly concerned with the minute histological 
changes which help to explain bone development in general, but he 
has added much to our knowledge of the mechanism of an outstanding 
phenomenon in animal life, and has brought to light a most striking 
series of adaptations. Antlers may weigh as much as the rest of a 
deer’s skeleton; yet they grow, fulfil their uses, and are shed in the 
course of a year. Nature, in fulfilling the seemingly impossible, is 
seen at her best. Shehas devised special means for the rapid formation 
of bone, the nuclear budding of bone-forming cells, and she sends 
a profuse supply of nutritive and heat-carrying blood to the growing 
antlers, in which the heat is held by the hairy covering of the velvet 
(cutis). The shedding of the antler is even more wonderful than its 
growth: the very hollows on its surface which at first protect the 
blood vessels, at last strangle them and cause the death and shrivelling 
