CONTENTS 
Visceral Pouches . 
The Thymus 
Epithelial Vestiges ; 
The Postbranchial Bodies in ae 
III. Tue (Esopuacus, STOMACH AND INTESTINE 
(Hsophaqus 
Stomach Be 0 
Large Intestine, Cloaca, and Anus bie} 
IV. Tue DeEvVELOPMENT OF THE LIVER AND PANCREAS . 
The Liver 
The Pancreas ; 
V. Tue Resprrarory TRActT 
Bronchi, Lungs and Air-sacs 
The Laryngotracheal Groove . 
CHAPTER XI. THE BODY-CAVITIES, MESENTERIES AND 
SEPTUM TRANSVERSUM Se eee 
I. THe SEPARATION OF THE PERICARDIAL AND PLEUROPERI-— 
TONEAL CAVITIES . 
Septum Transversum . 
Closure of the Dorsal Opening or the Perenan : 
Establishment of Independent Pericardial Walls 
Derivatives of the Septum Transversum ad, «eae 
II. SEPARATION OF PLEURAL AND PERITONEAL CAVITIES; OR- 
IGIN OF THE SEPTUM PLEURO-PERITONEALE 
Ill. THe M&sSENTERIES 
The Dorsal Mesentery 
The Origin of the Omentum 
Origin of the Spleen 
CHAPTER XII. THE LATER DEVELOPMENT OF THE 
VASCULAR SYSTEM 
I. Toe Hearr. 
The Tene opinent * he E Peinul Form a} ihe Rear 
Division of the Cavities of the Heart 
Fate oj the Bulbus 
The Sinus Venosus 
Il. Tue ArTerRIAL SYSTEM 
The Aortic Arches 
The Carotid Arch . 
The Subclavian Artery 
The Aortic System 
1x 
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