VOL. XV., No. 94. 



DECEMBER 1899. 



NATURAL 



A MONTHLY REVIEW OF 



SCIENTIFIC PROGRE: 



PAGE 



381 



CONTENTS 



Notes and Comments . . . ... 



Eliminated — Nature Studies — The Production of Parthenogenesis in a Sea- 

 Urchin — The Record of a Great Work — Floreat Wood's Holl — Asterionella— 

 New Mice fro'm St. Kilda — Alleged New Mice — British Mammals — 

 Phylogeny of the Rodents — Phylogeny of Rust — Ferments in Fungi — More 

 Sports — A Pontifical Plant — Neptuneopsis — A Note on Inheritance — The 

 Cell as a Unit of Organisation — The Biological Comer of a Natural History 

 Museum — Linne's Type Specimens of Fishes — The Molluscan "Liver "so- 

 called — Phylogenetic Senescence — Studies in Plant Morphology. 



Trees in Winter ....... 



By P. Q. Keegan, LL.D. 



Lacepede's "Tableaux . . . des Mammiferes et des Oiseaux" 

 By C. Davies Sherborn. 



An Extension op the Method of Treating Variations, with 

 Examples and certain Conclusions . 

 ByH. M. Kyle, M.A., B.Sc. 



A Zoologist on the Principles op Science . 

 ByF. A. Bather, M.A. 



On the Multinuclear Cells op some Grasses 

 By Rudolf Beer. 



Fresh Facts . 



Some New Books 



Obituaries 



Correspondence 



News . 



Index . 



399 

 406 



410 



423 



434 



440 

 442 

 461 

 462 

 464 

 471 



EDINBURGH & LONDON 



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