DISTRIBUTION OF LYMPHATICS IN SCORIM5NICHTII YS 



73 



until finally they come into contact, but do not anastomose. 

 Both of them end some little distance in advance of the ventral 

 fins, and either may receive the profundus ventral lymphatic 

 trunk. 



Ji.l.J.V. 



Mut.Kto 



Ph.L.V. 



Nixt.Vn 



V.P?r.S.(r> 



Lin. r. 



Fig. 7. Shows the branching of the ventral pericardial sinus to the pharynx 

 region, especially to the bases of the first and second branchial arches and the 

 thyroid gland. The anterior ventral pericardial sinus has been cut and turned 

 forward from its natural position. Small Scorpcenichthys. Natural size. 



A list of the abbreviations used in text-figs. 7 to 10 will be found in a general 

 list, p. 87, under 13. 



With Scorfcenichthys there is always a distinct and very im- 

 portant ventral ^pericardial sinus (Figs. 3, 4, 6, 7, 9 and 10, 

 V. Per. Si). Since there is always a marked depression in the 

 region of the bulbus arteriosus this sinus might be said to con- 

 sist of an anterior and a posterior portion. The posterior por- 

 tion of this sinus (Figs. 3,4, 6, 9 and 10, V.Per.S.) is a somewhat 

 irregularly-shaped reservoir situated below the anterior end of 

 the ventricle and the bulbus arteriosus. Its 2 posterior dorsal 

 corners are prolonged across the posterior half of the ventricle 

 as papilla? (Figs. 4, 6, 9 and 10, P. V.Per.S.), which com- 

 municate with the anterior ventral corners of the corresponding 

 pericardial sinuses. Between these 2 papillae the ventral longi- 

 tudinal lymphatic trunk curves around the cephalic ends of the 

 pelvic bones, and empties in the median line into the posterior 

 end of the ventral sinus. Ventrally this sinus bifurcates and 

 soon forms 2 conspicuous reservoirs situated on the ventral sur- 

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



