178 



RAYMOND PEARL 



to occur. Further all duplicates have been omitted, so that only 

 the different possible types are shown in these tables. 



It will be noted from table 6 that two classes of females (1 

 and 2) carry both Li and Lo and hence are to be expected, on 

 the hypothesis developed, to be high layers. One class (class 5) 

 carries neither Lj nor L^ and hence should make zero winter records. 

 It should be said that observations indicate that while such class 

 5 birds occur with expected frequency, they usually do not pro- 

 duce any offspring. A zero winter layer usually gets very few 

 chicks of any kind and almost never has any adult ? progeny. 



Turning our attention to the Cornish Indian Games, we have 

 the gametic constitutions set forth in tables 7 and 8. The only 

 special point to be noted here is that the factor Lo does not appear 

 at all in either males or females. All the evidence indicates that 

 in the strain of Cornish Indian Games used in these experiments, 

 this excess production factor Lo is entirely absent (cf. in this con- 

 nection tables 1, 2 and 3, supra). 



TABLE 7 

 Constitution of Cornish Indian Game males in respect to fecundity 



GAMETES PRODUCED 



fUh 



fuh, f hh 

 fhh 



TABLE 8 



Constitution of Cornish Indian Game females in respect to fecundity 



It will be noted that C.I.G. .9 classes 2 and 3 are gametically identical. Both 

 are left in the table, however, since the whole table is so short that no confusion 

 can be caused, and this example may make clear to some readers the nature of the 

 compression (by omission of duplicate classes) which was practised in tables 5 

 and 6. 



