PROCEEDINGS 



OF THE 



WASHINGTON ACADEMY OF SCIENCES 



Vol, VII, pp. 37-157. Plates I-VI. June 20, 1905. 



THE BLOOD-VASCULAR SYSTEM OF THE LOR- 

 ICATI, THE MAIL-CHEEKED FISHES. 



By William F. Allen. 



CONTENTS. 



PAGE. 



Section I. — Introductory 28 



I. Introduction 2S 



II. Technique 30 



1. Injecting Masses 30 



2. Apparatus 31 



3. Mode of Procedure 31 



III. Historical Review 33 



Section II. — Text 36 



IV. General Survey of the Blood Vessels in Ophiodon 36 



V. Heart 38 



VI. Peripiieral Distribution of the Arteries 43 



1. Branchial Arteries 43 



2. Arteries Arising from the Ventral Ends of the Efferent 



Branchial Arteries 46 



3. Carotid Arteries 51 



4. Opercular and Dorsal Branchial Muscle Arteries 62 



5. Siibclavian Arteries 63 



6. Coeliaco-Mesenteric Artery 65 



7. Dorsal Aorta 73 



VII. Peripheral Distribution of the Veins 78 



1. Jugular Veins 7^ 



2. Vessels Emptying Directly into the Jugular or into the Head 



Kidney ' 87 



3. Inferior Jugular Veins 91 



4. Ventral Veins 93 



5. Subclavian Veins 94 



6 Hepatic Portal System 96 



7. Renal Portal System 106 



VIII. Vascular Sj'stem in Anoplopoma 113 



IX. General Considerations and Summary 120 



X. Brief Synonymy of the Blood Vessels 125 



XI. Bibliography 132 



XII. Explanation of the Plates 138 



XIII. Reference Letters and Abbreviations Used in the Figures . . . 149 



(^7) 



