396 C. 0. WHITMAN. 



ing the primitive groove with the marginal notch may be con- 

 sidered analogous to the '* linear streak" of the Elasmobranch, 

 while the marginal notch corresponds to the anterior angle of 

 the "yolk blastopore/' marked yJc in Balfour^s figure. 



lltbratuke on the foumation and significance of the 

 Primitive Stkeak. 



L. Agassiz. — (1) 'Contributions to the Natural History of the United 

 States,' vol. ii, part iii, Boston, 1857. "Embryology of the Turtle." 



Balfour. — (2) "The Development and Growth of the Layers of the Blasto- 

 derm," and 



(3) " On the Disappearance of the Primitive Groove in the Embryo 

 Chick," ' Quart. Journ. of Mic. Sci.,' vol. xiii, 1873. 



(4) 'Elements of Embryology,' part, i, Loudon, 1874. By Poster 

 and Balfour. 



(5) " A Comparison of the Early Stages in the Development of Verte- 

 brates," 'Quart. J. Mic. Sci.,' vol. sv, 1875. 



(6) "A Monograph on the Development of Elasmobranch Fishes,' 

 London, 1878. Reprinted from the ' Journal of Auat. and Phys.' for 

 1876, 1877, and 1878. 



(7) " On the Early Development of the Lacertilia, &c.," ' Quart, i. 

 Mic. Sci.,' vol. xix, 1879. 



(8) "A Renewed Study of the Germinal Layers of the Chick," 

 ' Quart. J. Mic. Sci.,' vol. xxii, 1882. By Balfour and Dcighton. 



(9) ' Comparative Embryology,' vol. ii, London, 1881. 



Braun. — (10) " Aus der Entwickelungsgeschichte der Papageien," 'Verb. d. 

 phys.-med. Gesellschaft zu Wiirzburg,' N. F., Bd. xiv and xv, 1879 and 

 1880. 



(11) " Die Entwickelung des Wellenpapageies (Melopsittacus undu- 

 latus Sh.) mit Beriicksichtigung der Entwickelung anderer Vogel," 

 Wiirzburg, 1881. 



(12) " Entwickelungsvorgiinge am Schwanzende bei einigen Silugc- 

 thieren, &c.," 'Arch. f. Anat. u. Pliys.,' anat. Abth., H. 4, 5, 6, 1882. 



DuRSY. — (13) 'Der Primitivstreif des lluhnchens.' 1867. 



Gassee. — (14) "Der Primitivstreifen bei Vogelembryonen," 'Schriften d. 

 Gesell. zu Beford. d. gesammten Naturwiss. zu Marburg.,' vol. ii, supple- 

 ment i, 1879. 



(15) "Die Entstehung dor Cloakenoffnung bei Iluhnercmbryonen," 

 'Arch. f. Anat. u. Phys.,' anat. Abth., 1880. 



(10) "Bcitrjige zur Kenntniss der Vogclkcimscheibe," 'Arch. f. Anat. 

 u. Phys.,' anat. Abth., H. 4—6, 1882. 



