DISTRIBUTION OF LYMPHATICS IN SCORP^NICHTHYS 6 1 



leads into a lateral vessel or papilla, which curves around the 

 first internal branchial levator muscle to empty into what has 

 been designated as the cephalic sinus (Figs. 4 and 5, Ceph.S.). 

 A full description of this sinus and its connection with the jugu- 

 lar behind the prootic process will be given under a separate 

 paragraph. 



Longitudinal /nrmal or inferior spinal lymphatic trunk and 

 the abdominal sinus. — Hyrtl and Stannius seemed to have over- 

 looked these vessels, but such a canal is represented by Vogt 

 (1, p. 138) as consisting of 2 large lymphatic trunks that follow 

 the aorta, and into which the trunk from the viscera and the 

 vessels from the body wall empty. The posterior connections 

 of these trunks were not given, but anteriorly they are said to 

 empty into a branch of the third canal, terminating in the 

 cephalic sinus. Vogt states (p. 138) that this canal (PL L, 

 Figs. 1 and 8 ; 64) comes from a common reservoir which fol- 

 lows the superior plate of the fourth branchial arch, and that it 

 receives 2 important branches, one coming from the fourth 

 branchial arch and the other arising at the middle of the body. 

 The last branch is said to communicate in the median line with 

 the corresponding branch from the opposite side immediately in 

 front of the kidney, and at this point receives the 2 longitudinal 

 trunks which follow the aorta. Two small vessels, which could 

 not be definitely traced, but which appeared to come from the 

 brain, are described as emptying into the cephalic ends of these 

 longitudinal trunks. Milne-Edwards (16, p. 477) says that in 

 general there are 2 lymphatic canals running parallel with the 

 aorta, but expresses some doubt about their emptying into the 

 cervical or cephalic sinuses. He further adds in a footnote that 

 Fohmann (4) found 2 longitudinal lymphatic vessels traveling 

 along with the aorta in the eel, which received branches from 

 the trunk musculature and emptied anteriorly into the cephalic 

 sinus. With the pike Sappey (25, p. 49) represents the trunk 

 sous-vertebral 2,$ occupying the same canal as the caudal artery 

 and vein, being situated below the vein, and receiving branches 

 which traverse the muscles adjacent to the hasmal spines. With 

 the Pleuronectidee (p. 50) he states that the inferior spinal trunk 

 empties into the jugular directly below the superior trunk. It 



