appear in the same number. No other portion of the cell is 



apparently transmitted from generation to generation. 



Number of Diploid or 2N 

 PLANTS. Chromosomes. 



Canna indica 6 



Crepis 6 



Chrysanthemum 90 



Lilium mastagon 24 



Drosera sp. (Sundew) 20 



Drosera sp 40 



Onion 16 



Oenothera gigas 28 



scintillans 15 



lata 15 



biennis 14 



lamarckiana 14 



Pisum sativum (Garden Pea 14 



Triticum sativum (Wheat) 16 



Rye 16 



Tomato 24 



Four O'clock :',2 



Corn {Zea maidis) 40 



Tobacco 48 



Cotton 56 



Gymnosperms 12 



Nightshade 72 



ANIMALS. 



Honey bee (male) 16 



Honey bee (female) 32 



Drosophila ampelophila 8 



Mouse 40 



Salamander 24 



Trout 24 



Sagitta 18 



Ox 16 



Guinea pig 16 



Man 48, 47 



Grasshopper 12 



Artemia 168 



Ascaris 4 



Leptinotarsa (Potato Beetle ) 36 



Snail {Helix hortensis) 44 



Abraxas 56 



Anasa tristis (Squash Bug) 22, 21 



j;?2 



