PLATE VIII. 



Fig. 14. Represents a dissection of a lo-pound Lepisosteus osseus in the 

 region of the heart as seen from the ventral side. Ventral walls of the lym- 

 phatic sinuses and the right inferior jugular removed to show the union of the 

 ventral lymphatic trunk with the right pericardial sinns, the orifice of the latter 

 which communicates with the dorsal pericardial sinus, and the termination of 

 the two anterior branchial lymphatic trunks (nutrient branchial veins.'*) in the 

 right fork of the inferior jugular. X !• 



Fig. 15. Is a deeper dissection of the same specimen as 14. Heart, ventral 

 aorta, most of the efferent branchial vessels, and the ventral walls of the lym- 

 phatic sinuses and inferior jugular removed to show the points of termination of 

 the branchial lymphatic trunks (nutrient branchial veins.'*) in the inferior jugu- 

 lar, the pericardial sinuses in the dorsal pericardial sinus, its connections with 

 the inferior jugular above, and finally the discharging of the inferior jugular in 

 the sinus venosus. X f- 



140 



