Jan. 1 6, 1879] 



NATURE 



Ixxxiii 



British and Foreign Insects, Cabinet', &c. 



Mr. J. C. STEVENS will Sell by Auction, 



at his Great Rooms, 38, King Street, Covent Garden, on FRIDAY, 

 January 24, 1879, at half-past 12 o'clock precisely, several \-alnable 

 Collections of British Lepidoptera, comprising many rare species and 

 unique varieties, also several Cabinets, by the best makers, of 23, 40, 

 and 50 Drawers ; also a quantity of Butterflies in papers from Ceylon, 

 collected by Messrs. Whyte and Co. 



On view Morning of Sale, and Catalogues had- 



CROOKES' MOLECULAR SHADOWS.— 



Vacuum-tubes showing the above n^vel and beautiful phenomena, 

 I2J. (>d. — J. J. MARR, Optician, 31, Moorfields, Liverpool. 



EOZOON CANADENSE. 



JAMES R. GREGORY has just received a large number of very fine 

 Specimens of the above, at all prices ; also Section? of the same, cut for 

 the microscope. Price of Specimens polished, jr., loj., and upwards. 

 Microscopic Sections, post free, zr. id. each, of 



JAMES R. GREGORY, 

 GEOLOGICAL MUSEUM, 



86, CHARLOTTE STREET, FITZROY SQUARE. 



LONDON. 



GEOLOGY.— In the Preface to the Student's 



ELEMENTS of GEOLOGY, by Sir Charles Lyell, price 9J., he says : 

 — " As it is impossible to enable the reader to recognise rocks and mine- 

 rals at sight by aid of verbal descriptions or figures, he will do well to 

 obtain a well arranged collection of specimens, such as may be procured 

 from Mr. TENNANT (149, Strand), Teacher of Mineralogy at King's 

 College, London." These Collections are supplied oa the following 

 terms, in plain Mahorany Cabinets :— 



100 Specimens, in Cabmet, with 3 Trays .» m. ^ ^» a o ^ 

 200 Specimens, in Cabinet, with 5 Trays .~ .^ .~ 5 5 o 

 3«o Specimens, in Cabinet, with 9 Drawers ... ... 10 10 o 



400 Sptaimens, in Cabinet, with 13 Drawers .~ ... 21 e o 

 More extensive Collections at 50 to 5,000 Guineas each. 



SCIENTIFIC CHRISTMAS PRESENTS. 



Collections of FOSSILS, ROCKS, or MINERALS, arranged in Walnut 

 "Stained and polished Cabinets with Lock and Key. Size of Specimens, 

 2 square inches. 100 Selected, 2as. 200 Selected, 40;. 

 Catalogue free. 

 *,* No charge for packing. Carriage free to all parts of Great Britain. 

 "THE POPULAR SCIENTIFIC POCKET CABINET SERIES," 



(Second Edition.) 



Gems, Minerals, Metals, Fossils, Rocks, Shells, &c., &c. 25 Specimens 



in Cabinet, zf, io<^. carriage paid. 



THOMAS J. DOWNING (MINERALOGIST), 



38, WHISKIN STREET. LONDON, E.C. 



THE QUARTERLY REVIEW, 



No. 393, is now published. 

 Contents. 

 I.— LESSING. 

 II.~AGGRESSIVE NONCONFORMITY. 

 III.— THE REFLECTION OF ENGLISH CHARACTER IN 



ENGLISH ART. 

 IV. -PRINCE BISMARCK. 



v.— OUR SCH )OLS AND SCHOOLMASTERS. 

 VI.— IS POLITICAL ECONOMY A SCIENCE? 

 VII.— DR. SAMUEL SMILES' WORKS O'^T SELF-HELP. 

 VIII.— RUSSIA AND THE INDIAN FRONTIER. 

 IX.— PARTY GOVERNMENT. 



JOHN MURRAY, Albemarle Street. 

 On the ist of every Month, price Sucpence. 



THE ENTOMOLOGIST: 



AN ILLUSTRATED JOURNAL OF BRITISH ENTOMOLOGY. 



Edited by John T. Carrington, 

 With the Assistance of 

 Frkdkkick Bond, F.Z.S. I Frederick Smith, F.L.S. 



Edward A. Fitch. I J. Jenner Weir, F.L.S. 



John A. Power, M.D. | F. Buchanan White, M.D. 



The EntftneUgiit was founded for the purpose of diffusing information 

 "ith regard to the science generally, and especially respectmg Insects in- 

 rious to Farm or Garden ; for Recording the Capture of Rarities ; and 

 r Figuring Varieties. Monthly Lists of Duplicates and Desiderata are 

 pubUsked. 



Interesting articles on all branches of the science are promised by leading 

 entomologists. Especial attention is given to the printing of the Woodcitt 

 Illustrations, which are numerou?. There are occasionally Colodrko 

 Plates. 



SIMPKIN, MARSHALL, and CO., Stationers' Hall Coott. 



Ne.v Ser.es, No. LXXIIL. JANUARY, 1E7;, pr.ce df 



THE QUARTERLY JOURNAL OF 

 MICROSCOPICAL SCIENCE. 



Edited by 

 E. RAY LANKESTER, M.A., F.R.S., F.L.S., 

 Fellow of Exeter College, Oxford, and Professor of Zoology and Compara- 

 tive Anatomy in University College, London ; 

 With the co-operation of 

 WM. ARCHER, F.R.S., M.R.I.A., 

 Dublin; 

 F. M. BALFOUR, M.A., F.R.S.. F.L.S., 

 Fellow and Lecturer of Trinity College, Cambridge ; and 

 E. KLEIN, M.D., F.R.S., 

 Lecturer on Histology in St. Bartholomew's Hospital Medical School 

 London. 



Contents of No. LXXIII. — New Series. 



Memoirs^ 



On the Existence of a Head-Kidney in the Embryo Chick, and on Cer- 

 tain Points in the Development of the Mullerian Duct. By F. M . 

 Balfour, M.A., Fellow of Trinity College, Cambridge; and Adam 

 Sedgwick, B.A., Scholar of Trinity College, Cambridge. (With Two 

 Plates.) 



Notes on some of the Reticularian Rhizopoda of the Challenger Expe- 

 dition. By Henry B. Brady, F.R.S. (VVith Three Plates.) 



Researches on the Flagellate Infusoria and Allied Orgjanisms. By O. 

 Butschli, Professor of Zoology in the University of Heidelberg. (With 

 Plate.) 



The Morphologn^ and Systematic Position of the Spongida. By F. M. 

 Balfour, M.A., Fellow of Trinity College, Cambridge. 



Flagellated Organisms in the BIxkI of Healthy Rats. By Timothy 

 Richards Lewis, M.B. 



Notes and Memoranda — 

 Observation on the Capitellidae. By Dr. Hugo Eiag. 

 Bacteria as the Cause of the Ropy Change of Beet-root Sugar. 

 Stein's " Organismus der Infusionsthiere." 



Proceedings of Societies — 

 Dublin Microscopical Club. 



J. & A, CHURCHILL, New Burlington Street. 



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