DISTRIBUTION OF LYMPHATICS l\ SCORP^ENICHTHYS 63 



the profundus ventral lymphatic vessel. Numerous interlinking 

 vessels were also found between this sinus and the myelonal 

 trunk. With Ophiodon a large posterior mesenteric trunk was 

 seen to pass between the generative organs with the correspond- 

 ing vein acid empty into this sinus ; it had its origin from the 

 posterior end of the intestine, being simply a continuation of the 

 main intestinal trunk. As has already been stated the abdomi- 

 nal sinus receives a communication from the pectoral sinus, and 

 a little in advance of this a connection is received from the peri- 

 cardial sinus (Figs. 4 and 6) ; while between the two it receives 

 the large cceliaco-mesenteric lymphatic trunk (Figs. 4 and 6, 

 Cce. Mes. L. V.), coming from the viscera and following the 

 course of the corresponding artery. In advance of the head 

 kidney each cephalic fork of this sinus swells up considerably 

 upon the receipt of 3 sinuses from the region of the branchial 

 arches. An important communication, which has already been 

 mentioned is the papilla from sinus (S) of the cranial lymphatic 

 trunk (Figs. 4 and 5, S.). Another possible accession is the 

 profundus facial lymphatic trunk (Figs. 4 and 5, P.Fac. 

 L. V.). 



Branchial or dorsal branchial sinuses (Figs. 4 and 5, Br.L.Si). 

 These 3 sinuses appear to arise from the dorsal extremities of 

 the first, second, third and fourth arches respectively, and pass- 

 ing between the obliqui dorsales muscles, unite with each other 

 and the abdominal sinus in such a way as to entirely encircle the 



2 internal branchial levator muscles. My injections simply 

 showed these sinuses to be blind pockets off from the ab- 

 dominal sinus, and no trunks from the branchial arches or 

 even from the dorsal branchial muscles were seen to empty 

 into them. 



Vogt in the salmon (1, p. 177-8) describes the second canal 

 emptying into the common cephalic sinus as being composed of 



3 different branches, each of which is composed of 2 different 

 components. These 3 branches come from the first, second, 

 and third branchial arches, and of their 2 components, one is 

 very small, arising from the superior part of the arch especially 

 from the filaments ; while the other is more superficial, continues 

 along the arch and unites with the inferior jugular (Veine de 



