68 ALLEN 



the face, the second from the first 3 branchial arches, and 

 the third from the fourth branchial arch, the viscera, and the 

 body wall. Hyrtl (7) states that the lateral trunk in Acificn- 

 ser, Cy-prinns, Leuciscus, Esox, etc., ends in a thin-walled 

 pear-shaped sinus situated at the side of the skull, a little 

 behind the orbit, which empties into the jugular a little forward 

 of the lower jaw and opercular vein. This sinus he believes is 

 contractile upon electrical or mechanical stimulation. With the 

 salmon and trout the lateral trunk is said after passing under 

 the clavicle to end in a sinus that discharges itself in the sinus 

 of the spermatic vein (Sinus der Holvenen) at its junction with 

 the ductus of Cuvier. A valve was seen at the point of union, 

 but no vessels were described in advance of the cephalic sinus ; 

 doubtless for reasons so fully set forth by Vogt (1), namely, that 

 the vessels emptying into this sinus were all guarded by valves, 

 and the injection mass would naturally find its way into the 

 venous system. With Pcrca lucioferca, Tinea chrysitis and 

 Cottus gobio both points of union were noticed. Stannius (24, p. 

 254) speaks of the lymphatics from the head, gills, and trunk as 

 uniting in a sinus that emptied into the truncus transversus (pre- 

 cava) near the jugular, and in a footnote states that this com- 

 munication was noted by Monro (14) and Hewson (5). Milne- 

 Edwards (16, p. 475) following Hyrtl says that in the pike, 

 roach, grudgeon, barb and sturgeon, the lateral trunk is pro- 

 longed into the head and terminates at the base of the cranium 

 into a sinus that empties into the jugular through a transverse 

 canal. While in the salmon, cod, rays and sharks he describes 

 the lateral vessels as opening into a pair of cervical sinuses, 

 which descend behind the center of the scapula to unite in the 

 median line at a point where the abdominal sinus joins them, 

 and each of these scapular reservoirs is said to communicate 

 with the ductus Cuvieri through an orifice protected by valves. 

 Also with Perca lucioferca and Cottus Gobio 2 modes of com- 

 munication with the venous system are vaguely mentioned. 

 Trois's description in Lophius (28, p. 8) of the termination of 

 the 2 lateral lymphatic vessels in the cervical or cephalic sinuses 

 and their union with the abdominal sinus is almost identical 

 with the descriptions given by Hyrtl and Milne-Edwards, 



