404 
Miscellaviea 
In Table E, on p. 24, the full list of matings is given. As it stands, it is far from satis- 
factory, and the list of errors in the statement of form of crest which can be detected from a 
study of this table alone, is a large one. Only G6 matings in all are given. 
In Experiments 501, 509, 616 and 723, a reference to Exp. 624 should be to Exp. 623. In 
Exp. 714, a reference to Exp. 625 should be to Exp. 624 ; Exp. 625 does not occur in this 
Table at all. In Exps. 716 and 725, a reference to Exp. 623 should be to Exp. 622. In Exp. 702, 
there is a mating with a bird which has no number at all. It is said to be a crested bird but 
there is no indication whether the crest is perfect or imperfect. Similarly no statement as to 
the presence or absence of baldness is made about Birds Nos. 50 (used twice), 269, and 240. 
Bird No. 110 used in Exp. 729, is not marked either for crest or baldness ; it comes from 
Exp. 604 but it does not occur in the columns in which crest and baldness are indicated although 
it is marked "Yellow" in the colour columns. To balance matters, however, Bird No. 192 in 
this Experiment (604) is given in the columns for crest but is dropped in the columns for colour, 
while Bird No. 112 is entered twice in the colour columns. In Exp. 703, Bird No. 67 is said to 
come from Exp. 10 ; it really comes from Exp. 505. In Exp. 703 also, three birds are said to 
have died young when considering crest and four when dealing with colour. In Exp. 503, Bird 
No. 40 comes from Exp. 405, not from 505 as stated. In Exp. 709, Bird No. 143 comes from 
Exp. 609, not from 607 as stated. In Exp. 405, Birds Nos. 39 and 40 are said to have "crest 
present" ; in Exps. 503 and 511, No. 40 is said to have "crest absent," while in Exp. 614, No. 39 
is said to have "crest absent." As an example of an error of omission, there appears in 
Table II (Exp. 717), a mating between two birds which are not numbered ; this mating does not 
occur in Table E at all. 
Disregarding this serious list of blunders, however, we may now proceed to examine Tables I, 
II and III, and Davenport's deductions from them. Since those tables can only have been 
made up from the General List of Matings, Table E, we shall assume that Table E, in so far as 
it is not self-contradictory, represents the facts of the case*. 
Dealing with presence or absence of crest, Davenport states (p.- 8, 6 lines from bottom) that 
"crest is alternative in inheritance, for when crested and non-crested birds were paired, the 
offspring were either well crested or plain headed and there were no intergrades." Davenport 
here uses "non-crested" as equivalent to "plain headed." A few lines further on, however 
(p. 9, line 1), he says that Table I "gives an answer to the question whether non-crested heads 
are recessive to plain heads " ; while in his conclusions on p. 23, he says that " crest is dominant 
over plain head." In the second of those three quotations "plain heads" ought to read "crested 
heads." 
Turning now to Table I, we find again many blunders here. 
For Exp. 514, read Exp. 509; for Exp. 613, read Exp. 614; for Exp. 614, read Exp. 615; for 
Exp. 615, read Exp. 616; for Exp. 623, read Exp. 622; for Exp. 624, read Exp. 623; for 
Exp. 711, read Exp. 712 ; for Bird No. 185 in Exp. 716, read Bird No. 186. 
Exp. 619 gave 12 non-crested birds, not 11 as stated. 
Further Bird No. 39 used in Exp. 614 (not Exp. 613 as stated) and said in Table I to have 
"crest absent," is said in Table E, Exp. 405, to have "crest present" and in Table E, Exp. 614, 
to have " crest absent." In Table I, however, the result of Exp. 405 is said to be two birds with 
" crest absent " and none with " crest present." In Table E, the result of Exp. 405 is said to be 
two crested birds and none without crest. 
Similarly in Table E, Exp. 507 is said to give one bird with "crest present" (No. 71); in 
Table I however it is said to give one bird with "crest absent." This bird No. 71 is not used 
again, so further light cannot be thrown on the matter. 
* Davenport states (p. 9, line 1) that Table I is "extracted from the general table." 
