THE PLACENTA. 615 



the decidua, the chorion, and the amnion forming a membranous 

 fringe around it, is in its turn expelled as the after-birth. The 

 continuation of the uterine contraction, after the expulsion of 

 the placenta, checks, and in normal cases reduces to a minimum, 

 the haemorrhage that necessarily results from the tearing across 

 of the maternal vessels along the plane of separation of the 

 placenta. 



The deepest part of the spongy layer of the decidua, in 

 which are the blind ends of the uterine glands, remains in the 

 uterus as a thin lining to the muscular walls ; and, from the 

 epithelium of these persistent parts of the glands, the entire 

 uterine epithelium is speedily regenerated. 



List of the more important Publications dealing with, or hearing 

 on the Development of Man. 



Ackeren, F. v. . ' Beitrage zur Entwicklungsgesohichte der weiblichen Sexual- 



organe des Menschen.' Zeitsohrif t fiir wissensohaf tliche Zoologle, xlviii. 



1889. 

 Allen, F. J. : ' On the Cause of the Twisting of the Umbilical Cord, illustrated 



by Mechanical Models.' Journal of Anatomy and Physiology, xxvi. 



1892. 

 Born, Gr. : ' TTeber die Derivate der embryonalen Schlundbogen und Schlund- 



spalten bei Saugethieren.' Archiv fiir mikroskopische Anatomie, xxii. 



1883. 

 Bowen, J. T. : 'The Bpitriohial Layer of the Human Epidermis.' Anatomischer 



Anzeiger, iv. 1889. 

 Broca, A : ' Contribution ^ I'Etude du D6veloppement de la Face.' Annales de 



Gynteologie, xxviii. 1887. 

 Chiarugi, G. : ' Anatomie d'un Embryon Humain de la Longueur de mm. 2-6 



en ligne droite.' Archives Italiennes de Biologie, xii. 

 Coste, M. : ' Histoire G§ni5rale et Particulifere du Dfeveloppement des Corps 



Organises.' 1847-1859. 

 Cunningham, D.J.: ' The Complete Fissures of the Human Cerebrum, and 



their Significance in connection with the Growth of the Hemisphere 



and the Appearance of the Occipital Lobe.' Journal of Anatomy and 



Physiology, xxiv. 1890. 

 Darwin, C. : ' The Descent of Man.' 2nd edition. 1874. 

 Dursy, E. : ' Zur Entwickelungsgesohichte des Kopfes des Menschen und der 



hoheren Wirbeltbiere.' 1869. 

 Ecker, A. : ' Icones Physiologiese.' 1851-59. 

 Eroolani, G. B. : ' Nuove Eioerche di Anatomia Normale e Patologlca suUa 



Placenta dei Mammiferi e della donna.' Mem. d. Accademia d. Scienz. 



d. Bologna. 1883. 

 Erdl, M. P. : ' Die Entwickelung der Leibesform des Menschen.' 1846. 



