Abstract
References
1.
Davis
C. L.
(1923 ) Contr. Embryol. Carneg. Instn , 15 , 1 .
2.
Fawcett
E.
(1905 ) J. Anat., Lond. , 39 , 494 .
3.
Grobstein
C.
(1953a ) J. exp. Zool. , 124 , 383 .
4.
Grobstein
C.
(1953b ) Nature, Lond. , 172 , 869 .
5.
Hughes
A. F. W.
(1943 ) J. Anat., Lond. , 77 , 266 .
6.
Low
A.
(1908 ) J. Anat., Lond. , 42 , 237 .
7.
Payne
F.
(1925 ) Contr. Embryol. Carneg. Instn , 16 , 115 .
8.
Stockard
C. R.
(1915a ) Proc. nat. Acad. Sci., Wash. ,
Stockard
C. R.
(1915b ) Amer. J. Anat. , 18 , 227 .
9.
Streeter
G. L.
(1942–1951 ) Contr. Embryol. Carneg. Instn , vols. 30–34 .
10.
Tonge
C. H.
(1953 ) Proc. R. Soc. Med. , 46 , 313 .