742 THE AMERICAN NATURALIST [Vol. XLIV 



Crookneck has a long neck with a bowl of only medium 

 diameter. Scallop has very flat fruits. F 3 is intermedi- 

 ate in both dimensions and therefore also in shape, i. e., 

 in ratio of length to breadth. F 2 shows a complete 

 series of dimensions and of shapes from one parent to 

 the other. The mean dimensions and shapes and the 

 coefficients of variation in sizes and shapes for parents, 

 F, and F 2 are given in the following table. 



























Scallop 60 

 Mid-parent 

 F, Hybrid 

 F, Hybrid 



39.6 

 7.4 



17.5 



11.4 



17.8 

 14.6 

 17.5 



3.47 



f L94 6 

 I 1.60' 



L48 



15.8 

 16.4 

 19.0 

 42.7 



12.0 

 12.3 



42L5 



13.8 



20.3 

 26.0 

 58.8 



Size and Shape of Gourds.— A cross of Striped Spoon 

 gourd with Filipino Horned gourd has been studied. 8 

 The Spoon gourd has a small, relatively long fruit. The 

 relation of length of the whole fruit to the diameter of 

 the bowl is similar to Crookneck squash. The Horned 

 gourd has a short, relatively thick fruit. The ratio of 

 length to breadth is greater than in case of Scallop 

 squash. The following table gives the mean sizes and 

 shapes and coefficients of variation in size and shape of 

 the parents, F x and F 2 . 



