The Shipley Collection of Scientific Papers, Volume 331890 - Zoology |
From inside the book
Results 1-5 of 33
Page
... male Burchell's zebra ( E. B ) va mare ( E.C. ) 7. Spencer ( H. ) Weismanniam о " 1 once more . Arejoinder to Prof. Weismann Wessmann ( 4. ) The all - sufficiency of natural selection . I. Monckman ( Dr. ) Science at Cambridge . Wallace ...
... male Burchell's zebra ( E. B ) va mare ( E.C. ) 7. Spencer ( H. ) Weismanniam о " 1 once more . Arejoinder to Prof. Weismann Wessmann ( 4. ) The all - sufficiency of natural selection . I. Monckman ( Dr. ) Science at Cambridge . Wallace ...
Page 36
... male pronucleus or head of the spermatozoon with the female pro- nucleus derived from the germinal vesicle , and the consequent formation of the segmentation nucleus , has been demonstrated . The segmentation nucleus is built up of ...
... male pronucleus or head of the spermatozoon with the female pro- nucleus derived from the germinal vesicle , and the consequent formation of the segmentation nucleus , has been demonstrated . The segmentation nucleus is built up of ...
Page 40
... male and female pronuclei , by the fusion of which the segmen- tation nucleus is formed , has been termed by Professor Weis- mann the germ plasm . In a series of elaborate papers he has developed a Theory of Heredity , based upon the ...
... male and female pronuclei , by the fusion of which the segmen- tation nucleus is formed , has been termed by Professor Weis- mann the germ plasm . In a series of elaborate papers he has developed a Theory of Heredity , based upon the ...
Page 44
... male generative organs , and loses its ex- cretory function , while the metanephros persists as the func- tional kidney . I have , however , fully discussed the evolution of the Vertebrate excretory system in my papers already quoted on ...
... male generative organs , and loses its ex- cretory function , while the metanephros persists as the func- tional kidney . I have , however , fully discussed the evolution of the Vertebrate excretory system in my papers already quoted on ...
Page 88
... males and 2,000 females . The total number of fore legs examined was , accordingly , 8,000 ; 4,000 left and 4,000 right . All of the observations fall , consequently , into four groups of 2,000 cases each ; namely , male right , male ...
... males and 2,000 females . The total number of fore legs examined was , accordingly , 8,000 ; 4,000 left and 4,000 right . All of the observations fall , consequently , into four groups of 2,000 cases each ; namely , male right , male ...
Common terms and phrases
acquired characters Actinozoa adult alimentary Amphioxus Anatomy ancestral Annelid ants appear archenteron assume become blastopore body Burchell's zebra carapace-length cavity changes chromatin cœlom colour connection corpuscles degeneration dentary derived deviation differentiation diploblastic disuse division ectoderm eggs embryo essay evolution excretory existence explanation fact females fibres formation frontal breadth germ germ-plasm growth homologous horse hybrid hypothesis important insects instance instincts larva larvæ legs less males mare mean mesoblast Metazoa modified morphological mouth and anus natural selection nephridia nervous system neural canal nucleus number of glands nutrition observations occur ontogeny organs origin ovum Panmixia Peripatus plants plasm pores pouches present primitive streak principle produced Professor Weismann protoplasm recognised regard reproductive cells result Schwann Sedgwick segmentation nucleus segmented animals somites specialised species Spencer stage structure substance supposed telegony theory tion tissues unicellular variability variations Vertebrata Vertebrate workers yolk zebra
Popular passages
Page 65 - The elementary parts of all tissues are formed of cells in an analogous, though very diversified manner, so that it may be asserted, that there is one universal principle of development for the elementary parts of organisms, however different, and that this principle is the formation of cells.
Page 7 - XVIII. OF THE SCHEMATISME OR TEXTURE OF CORK, AND OF THE CELLS AND PORES OF SOME OTHER SUCH FROTHY BODIES...
Page 72 - PROCESSES, AND COLLATERAL INFORMATION IN THE ARTS, MANUFACTURES, PROFESSIONS, AND TRADES, INCLUDING MEDICINE, PHARMACY, AND DOMESTIC ECONOMY ; designed as a General Book of Reference for the Manufacturer, Tradesman, Amateur, and Heads of Families.