VOL. Da ar No. 89. _ JULY 1899, 
NATURAL 
SCIENCE 
A MONTHLY REVIEW OF 
SCIENTIFIC PROGRESS 
CONTENTS aa 
Notes AND COMMENTS . 1 
The Animal Mind—The Art of Self. Divanesrostons of ine British 
Museum—The Scaly Squid—Echinoderms at the British Museum—<Acces- 
sions to the Natural History Museum—Bryozoa and Bipolarity —More 
about ‘‘ Bipolarity "—Natural Science in Australia—The Colouring Matter 
of Blue Coral—Zoology in Brazil—According to the Fancy of the Speller— 
Flora of Sand Dunes—Galway Natural History Museum—Botanical Bio- 
graphy—A new found Trilobite from Newfoundland—Mexican and Central 
American Squirrels—Spinning at Dawn—E pur si muove !—A Comple- 
mentary Male—Is Fertility Inherited !—Living Fossils. 
Notes ON THE Hasits oF THE NORTHERN Four SEAL . ; J 17 
By G. E. H. Barrett-Hamilton. 
EXcAVATIONS ON PUFFIN ISLAND ; : y E * 42 
By Philip J. White, M.B. 
Mr. F. W. HeapLey on Evonution . , ; ; : 46 
By R. F. Licorish, M.D. 
MeErTrorRoLOGY AND EruHics : ‘ ; , : ; 49 
Tur CoMPARATIVE CHEMISTRY OF OUR ForEST TREES . : a 53 
By P. Q. Keegan, LL.D. 
Fresh Facts . : : ; : ; : E 60 
Some New Booxs ; : : ; ; ; : 62 
OBITUARY : d ; ; ' , e ; 70 
Rudolf Leuckart. 
NEws . 2 : : ; : ; - : rhe 


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