PREDICTION OF PAIRING 



145 



Table i6 



Examples of Supernumerary Fragment Chromosomes. 



. Animals. 

 (i) Apparently derived from Y chromosomes and inert. 

 Metapodins {1-6 jf), Diabrotica, Banasa Wilson, 1905, 1909. 1928. 

 Alydus ...... 



Blaps lusitanica .... 



(ii) Apparently derived from autosomes. 

 Tettigidea parvipennis 

 Locusta danica (23 -f- 1-4 ff) (^equalin 

 size to the smallest members of the 

 complement). .... 



Aleurodes proletella .... 



Philosamia cynthia .... 



B. 



Reuter, 1930. 

 Nonidez, 1920. 



Robertson, 191 6. 



Itoh, 1934. 

 Thomsen, 1927. 

 Dederer, 1928. 



Plants. 

 (i) Dicotyledons. 



Rumex acetosa (14 + T-Sff) 



Thalictrum aquilegifolium . 



Ranunculus acris (14 + 3-T-O ff) 



R. Ficaria * (16 + 4 j5^) 



Rosa pyr if era {1^ -\- 2ff) . 



Primula spp. .... 



Alectorolophus (Rhinanihus) major 

 (i4 + 8#) .... 



Datura Stramonium (24 + 2 j^) . 



Solanum Lycopersicum (24 -\- 2 ff) 



Crepis tectorum (8 +/) 



C. syriaca ^ (10 + 0-8 jf) 



f) 



Hieracium umhellatum (27 - 

 Leontodon hispidus (14 +/) 

 (ii) Monocotyledons . 

 Lilium Henryi, etc. (24 -{- 2 jf) 

 Fritillaria imperialis ^, ^, * (24 + i-6j5f) 

 F. obliqua, etc. (24 -\- 2 jf) 

 Allium. allegheniense, etc. (14 +/) 

 Tulipa galatica and hybrids ^, ^, 



(24 + 1-19 ff) 

 Naias marina .... 

 Crocus hyemalis {6 -\- ^ff) 

 Spironema fragrans (12 +/) 

 Tradescantia virginiana ^, ', 



(24 + 1-6 ff). 

 T. bracteata (12 +/) 

 Secale cereale ^, * (14 + 1-4^) • 



Zea Mays ^, ^, * (20 + 1-25 ff) . 



Paspalum stoloniferum (20 -\- 3Jf) 

 Poa pratensis (67 -\- 2 ff) . 

 Alopecurus pratensis (28 + 2 ff) 

 Festuca pratensis * (14 + i~5 jf) 



Ono, 1935 ; Yamamoto, 1933. 



Langlet, 1927. 



Langlet, 1927. 



Larter, 1932. 



Erlanson, 1933. 



Bruun, 1932. 



Fagerlind, 1936. 

 Blakeslee, 1931. 

 Lesleys, 1929. 

 Navashin, 1926. 

 Cameron, 1934. 

 Bergman, 1934. 

 Bergman, 1935. 



Mather, 1935. 

 D., 1929 c, 1930 c. 

 D., 1936^. 

 Levan, 1932. 



Upcott, unpub. 

 Winge, 1925. 

 Mather, 1932. 

 Richardson, 1934. 



D., 1929 c. 



Gotoh, 1924 ; Belling, 1925 a ; 



D.. 1933- 

 McClintock, 1933 ; Avdulov, 



1933- 

 Avdulov and Titova, 1933. 



Rancken, 1934. 

 Rancken, 1934. 

 Rancken, 1934. 



1 Inert. ^ Active. ' Varying in number somatically. * Not always pairing 

 at meiosis. 



