CROSSKS AM) KKIMIUI Y c.|' \\||.|, -I'l.MI- 01 ROB 



II 



i< ofcrottet (continued). 



' Crip.-s made (1111 II by Ihr ...,liu,r. 



6 It does not now seem certain that this bird was a female; it acted as one. but laid Do ff I find no record of ma 

 autopsy. KDITOK. 



~ The data for this cross as found in a nummary i" A 1 /7; the original data are not available to the editor. 



*The Oro < . marked with an asterisk (*) have been added from the ree. ,: i o an rarly Mimrnar) 



made by Profes^m \\ hitman. 



STATEMENT BY THE EDITOR. 



It will be seen that a number of hybrids are here used as members of primary 

 crosses. The method used in the preceding lists and throughout this vnlun 

 naming or designating hybrids, therefore, requires at this point a unnl <.f explana- 

 tion. 3 This method will probably become clear from an explanation of a single 

 example. In cross No. 23 of the above list the composition of the two birds entering 

 the cross is expressed as follows: Tw-lur-orinihtlix X /". x huin-ri*. That part 

 of the formula which is written in front of , the largest X (or X X) gives the com- 

 position of the male used in the cross; in this case 7'. hirtur and 7 

 The order of these two specific names indicates at the same time that this hybrid 

 sire has a turtur father and an oriental ix mother, since the designation of the male 

 parent always precedes that of the female parent in every formula and in e 

 part of a formula. Similarly the portion of the formula \\rit ten <;//,/ the lai . 

 X (or XX) gives the composition of the female, in this case huniili* x Intti, 



3 This is only in part the method used by Professor Whitman in making hi* records Me u-. ,; 

 the later years he employed a immenitor-dmomiimtor formula in which tho nun 

 the father and the denominator that of the mother. He n>e,l an initial, or smiilr letter. 

 grouped these symbols somewhat as in the method described above. His description of a bird of the 



T-O 



the one given above had the following form : 



11 I, s 



It seemed to the editor that this sort of nomenclature, though 



very convenient for making the records, is not well suited to the purposes of publication. 



