EARf;Y ONTOGENETIC PHENOMENA IN MAMMALS. 221 
Professor Hubrecht’s Paper on the Early Onto- 
genetic Phenomena in Mammals : An Appre- 
ciation and a Criticism. 
By 
Kicliard As^lieton, 31.A., 
Trinity College, Cambridge ; Lecturer on Biology in the Medical 
Scliool of Guy’s Hospital, in the University of London. 
With 5 Text-figs. 
Pkbface. 
Professor Hubrecht’s paper in a recent number of the 
‘ Quarterly Journal of Microscopical Science ’ brings together 
“ tlie I’esults of new investigations and recent reflections with 
such as had already been published on earlier occasions.” 
Even if “ tlie new investigations and recent reflections” 
do not contain a great deal that is new, nevertheless the 
whole is an invaluable expression of the Professor’s present 
opinion on a subject which he is doing so much to advance 
and to cause others to devote attention to. At the same time 
it is not possible to ignore the feeling that this new paper 
would have been of still greater interest had the author, in 
addition to the resume of his results, thought fit to discuss 
more fully the difficulties which have arisen in the minds of 
some who are unable to accept his theoretical conceptions. 
Hubrecht has no doubt deliberately chosen to leave for the 
moment unanswered the objections urged against his views, 
possibly with the hope that objections — if such there are — 
may be formulated more precisely than heretofore, in which 
case we may hope for a chapter making good this omission 
at a no very distant date. 
VOL. 54, PART 2. — NEW SERIES. 
16 
