1899] BRYOZOA AND BIPOLARITY 7 
northern and southern hemispheres. But, whatever conclusions may 
be drawn, the paper at least is one that does credit to the Zoological 
Laboratory of Owens College. 
More about “ Bipolarity.” 
Dr. ARNOLD E. OrRTMANN of Princeton, who pointed out in 1894 that 
the facts in regard to the distribution of Crustacea did not fit in with 
the “Bipolarity hypothesis,’ has some further remarks to make on 
the subject. He has been waiting, he says, for some definite expression 
of results from those who have been working at the “ Hamburger 
Magelhaensischen Sammelreise,” and he is disappointed. Perhaps 
Dr. Pfeffer’s lecture at the annual meeting of the German Zoological 
Society—which he has promised to send us as soon as possible—may 
afford further light on the problem to which we recently referred in 
our summary of Professor D’Arcy Thompson’s paper. The onus proband 
seems to lie with the upholders of the hypothesis, but we wish that 
Dr. Ortmann would send us something more satisfactory than his 
recent note (Zool. Anzeig. xxii. 1899, pp. 214-216), which makes only 
one point, namely, that seven authors who have recently dealt with 
the question are all on his side. It seems absurd to lose good-humour 
on such a question, and even if Dr. Ortmann feels that he has ground 
for irritation it is a mistake to make this apparent. The proper 
safety-valve is an article in Natwral Science. 
Natural Science in Australia. 
THE Report of the seventh meeting of the Australasian Association for 
the Advancement of Science is a bulky volume of 1160 pages, which 
is full of interesting material, and affords abundant evidence of the 
activity of scientific life in Australia. The President, Professor A. 
Liversidge, who also edits the Report, dealt in his address mainly 
with some of the recent advances in physics and chemistry. Among 
the reports and papers more especially bearing upon natural science, 
we may notice those on glacial boulders in Central Australia, and on 
vernacular names of Australian birds; Captain Hutton’s address on 
Early Life on the Earth (previously referred to in our columns); Dr. C. 
J. Martin’s address on the history of the relations between morphology 
and physiology during the last fifty years; Mr. F. Manson Bailey’s 
“few words” on the flora of the Torres Straits; Mr. J. F. Bailey’s 
beautifully-illustrated paper on the plants of the rabbit-infested country 
in the Bulloo River district; Mr. A. J. Campbell’s memoir on the 
