62 ALLEN 



is also of interest to note in this connection that he claims to 

 have found the minute lymphatic vessels anastomosing with the 

 blood capillaries in the connective tissue of the muscles and the 

 skin. Trois' description of this canal in Lofhius, Urano- 

 scofius, and in the Pleuronectidae (28 to 31) is very similar to 

 Sappey's, but so far as could be learned he does not give a 

 cephalic ending for this trunk. With the Pleuronectidas he finds 

 2 parallel longitudinal vessels, a superior and an inferior longi- 

 tudinal trunk, having numerous anastomosing cross branches 

 that form a scale-shaped network on the caudal vein. Hopkins 

 does not mention any longitudinal haemal trunk, but describes 

 (8, p. 375) a large abdominal sinus running along the right side 

 of the air-bladder. Caudad it is said to anastomose with one of 

 the ducts from the duodenum ; throughout its course it receives 

 branches from the bladder and the stomach and finally empties 

 into the right lymphatic sinus, which terminates in the ductus 

 Cuvieri. 



Both the longitudinal haemal lymphatic trunk and the abdom- 

 inal sinus were found in Scor^pcenichthys. The haemal trunk 

 was noticed only in the caudal region, and undoubtedly empties 

 into the abdomidal sinus. 



The abdominal sinus in Scoi'-panichthys (Figs. 4, 5 and 6, 

 Abd.S.) is a very large and important sinus, lying directly 

 below the kidney and extending from the posterior end of the 

 abdominal cavity to the orbit. A little behind the precava it 

 divides, each fork following along under its respective lobe of 

 the kidney continues cephalad along the ventro-lateral surface 

 of the skull, and when the prootic process is reached directly 

 below the jugular, or directly opposite the first internal branchial 

 levator muscle, it turns inward and downward to end blindly 

 opposite the parasphenoid behind the orbit. In some specimens 

 the injecting mass so settled as to give the appearance of 2 

 abdominal sinuses with numerous cross branches in the visceral 

 cavity. Throughout the abdominal cavity this sinus receives 

 many branches from the reproductive organs, urinary bladder, 

 body wall, and probably from the kidney itself. The body 

 wall vessels are the intercostals, which follow along the inner 

 surface of the intermuscular septa and anastomose ventrad with 



