PROCEEDINGS 



OF THE 



WASHINGTON ACADEMY OF SCIENCES 



Vol. VIII, pp. 41-90. May iS, 1906. 



DISTRIBUTION OF THE LYMPHATICS IN THE 



HEAD, AND IN THE DORSAL, PECTORAL, 



AND VENTRAL FINS OF SCORP^N- 



ICHTHYS MARMORATUS. 



By Wm. F. Allen. 



CONTENTS. 



Page. 



Introduction 41 



General Survey of the Lymphatics of Scorpienichthys 44 



Superficial or Subcutaneous Lymphatics of the Trunk 47 



Profundus or Submuscular Lymphatics of the Trunk 58 



Facial Lymphatics 65 



Lymphatics of the Hyoid Arch 66 



Cephalic Sinus • 67 



Pericardial Sinuses 71 



General Considerations and Summary 78 



Synonymy 83 



Literature S4 



Description of the Figures 87 



Abbreviations Used in the Figures 87 



I. INTRODUCTION. 



In some previous work on the Blood-Vascular System of the 

 Loricati (2) 1 the lymphatics were frequently injected to distin- 

 guish them from the veins, and, and upon looking over the lit- 

 erature of the lymphatics of fishes, I was impressed with the 

 general incompleteness and obscureness that seemed to charac- 

 terize it. Ophiodon and Scorpcenichthys differ very materially 



1 The figures in parentheses refer to a list of the literature at the end of the 

 paper. 



Proc. Wash. Acad. Sci., May, 1906. 41 



