86 ALLEN 



I, 13), which drains the posterior part of the pectoral fin. At 

 various intervals communicating branches are received from le 

 petit sinus longitudinal (Fig. i, 24), which runs parallel but 

 median to the grand sinus. In the lumbar region there is a 

 rich network ^(Fig. i, 16), which in part empties into le grand 

 sinus longitudinal and in part into its anterior branch le tronc 

 lateral posterieur. Midway between the pectoral and ventral 

 fins a large lateral branch is given off (Fig. i, 23) to communi- 

 cate with the veins at the articulation of the ventral fin, les 

 veines ext?'apelviennes. This communicating trunk also re- 

 ceives the rich network from the ventral fin. Two lymphatic 

 vessels are said to have their source from the snout region and 

 flow toward the eye (Fig. i, i). The outer one passes behind 

 the eye and empties into the internal jugular or a branch ; 

 while the inner one terminates in like manner mesad of the 

 eye. 



In brief, the subcutaneous vessels from the ventral surface of 

 the body are set forth as follows : In the anterior part of the 

 pectoral, laterad of the mouth, four vessels unite in a common 

 trunk (PI. VI, Fig. i, 6), which passes dorsal to discharge itself 

 into the anterior end of the sinus curviligne. Two of these 

 vessels arise from the anterior part of the pectoral and are 

 designated as le tronc anterieur (Fig. i, 2) and le tronc moyen 

 (Fig. 1,9); while the other two come from the median portion 

 of the body and are named le tronc ccphaliqtic (Fig. 1,1) and 

 le tronc thoracigtie (Fig. i, 8). The former takes its origin 

 from the snout region and the latter from the region immedi- 

 ately behind the mouth. Le tronc posterieur (Fig. i, 15) col- 

 lects the lymph from the posterior part of the pectoral and from 

 the abdomen ; it pierces the muscular wall to unite with the 

 common vein of the pectoral fin. Sappey states that the ab- 

 dominal plexus is remarkable for the fact that it not onh' anas- 

 tomoses with the networks of the ventral and anal fins, but in 

 addition there are numerous communications with the blood 

 capillaries. The rich network of the anal unites in a great 

 number of vessels that connect with those of the cloaca and in- 

 testine, and without a definite course disappear in the veins of 

 the caudal fin. 



