84 ALLEN 



pass out of the pores, concluded that this system also arose from 

 free openings in the digestive tract. Robin states that Foh- 

 mann's work on Torpedo marmorata (4) contains nothing not 

 found in Monro, and that his failure to inject the blood vessels 

 has resulted in many incorrect relationships. Fohmann desig- 

 nates the common chylous reservoir as the reservoir de Pccquet, 

 and finds in the digestive tract many connections between the 

 small veins and the lymphatics. He has not found muscle 

 fibers in these vessels, but considers them as contractile, and, 

 contrary to Monro, claims that they do not possess valves save at 

 the entrance into the veins. 



Leydig (12) made a histological study of the lymphatics of 

 the digestive tract of Raja batt's, and reached the conclusion 

 that the blood vessels are surrounded by chylous vessels. He 

 was the first to describe the tubular bodies, turbanliche Korper, 

 that encircle the lymphatic vessels, which Sappey and Mayer 

 have so fully discussed. 



Robin (23) after working up this system of vessels in Torpedo 

 galvanii and other plagiostomes, firmly declares (pp. 2 and 32) 

 that these subcutaneous vessels are veins, and that the chylous 

 vessels are the only lymphatics possessed by a fish. He also 

 describes (pp. 15-16) lymphatic networks arising from the heart 

 and neighboring trunks, which reach the veins through the 

 intermedian plexus on the oesophagus and liver. 



Parker (20, pp. 720-1) describes these subcutaneous vessels 

 in Mustelus antarcticus under the head of cutaneous veins, and 

 states that so far as his experience goes that they invariably 

 contain blood. A dorsal cutaneous vein is set forth as extend- 

 ing from the tail to some distance in front of the first dorsal 

 fin. Behind the second dorsal it forks ; the two branches 

 encircling the fin unite in front in a single trunk, which when 

 the first dorsal is reached subdivides into three branches, two 

 of which encircle the fin to reunite in front while the median 

 one passes ventrad to terminate in the left renal portal. An 

 anterior ventral cutaneous vein extends from the pubis to 

 the shoulder girdle. It is located between the skin and the 

 abdominal muscles, and receives a beautiful plexus from the 

 abdominal wall. "Anteriorly the vein trifurcates, the three 



