274 CHROMOSOMES IN HEREDITY: MECHANICAL 



Natural Populations. 

 Plants : 



Trillium erectum {ix). S. G. Smith, 1935. ana. I. 



Tulipa Orphanidea et al. {2x, ^x and 5;^). Upcott, unpub. pach. dip. ana. 

 I and II. 



Fritillaria dasyphylla et al. {ix and ^x). Frankel, unpub. ana. I and II. 



Agave sisalana. Doughty, unpub. ana. I. 



Secale cereale (inbred). Lamm, 1936. ana. I. 



PcBonia peregrina. Dark. 1936. ana. I. 



JEsculus Hippocastanum. Upcott, 1936. ana. I. 



Tradescantia gigantea {2x). Upcott, unpub. ana. I. 



Pisum humile. Sutton, unpub. ana. I. 



D., 1936 d. pach., dip. ana. I and IT. 



Animals : 



Chorthippus paralleluS(^ 



Stauroderus bicoloVf^ 



Drosophila melanogaster. Painter, 1934 ^> salivary gland. 



D. funebris, etc. Dubinin, et al., 1936, salivary gland. 



Anas platyrrhynca^ Roller, unpub. 



Chironomus dorsalis. Bauer, 1935 a, salivary gland. 



3. Inter-racial Hybrids. 



Avena sativa. Philp, unpub. ana. I and II. 



Drosophila pseudo-obscura. Roller, 1935, 1936 ; Tan, 1935, salivary gland. 



4. Interspecific Hybrids. 



Triticiim dicoccum X T. monococcum {^x). Mather, 1935. ana. I. 



Lilium Martagon X L. Hansoni {2x). Richardson, 1936. ana. I and II. 



Tradescantia {^x, probably 2X X 4X). D., and Upcott, unpub. 



Primula kewensis {2x). Upcott, unpub. ana. I. 



JEsculus carnea (Sat). Upcott, 1936. 



Pisum humile X P. arvense. Hakansson, 1936. ana. I. 



Crepis divaricata X C. dioscoridis {2x). Miintzing, 1934. ana. I. 



Drosophila melanogaster x D. simulans {2x). Patau, 1935, salivary gland. 



Anas platyrrhynca x Cairinamoscata {2x). Crew and Roller, 1936. ana. I 



5. 



Crossing-over in Inversions. 



Matthiola incana. 



Uvularia grandiflora (Fig. 5, " fracture "), 



Hyacinthus orientalis {2,x). 



A ucuba japonica {^x) . 



Stenobothrus lineatus, living cells (Fig. 68 I.e.). 



Hosta sp. 



Gasteria sp. 



Melanoplus femur-rubrum , living cells (Plate 



XVI). 

 Antennaria solitaria. 

 Avena sativa {()x) X A. strigosa [2x). 

 Briza media (Figs. 3A, 16). 

 Narcissus tazetta (Fig. 64). 

 Allium schosnoprasum (Fig. 36, ^x). 

 A. nutans (Fig. 52A, ^x). 

 Triticum monococcum {n = 7, haploid). 

 Lilium longiflorum. 

 Allium scordoprasum {^x). 



