82 ALLEN 



costal vessels, the coeliaco-mesenteric trunk from the viscera, 

 the dorsal branchial sinus which could only be traced to the 

 arches, and more than likely the lymphatic vessels from the 

 kidney and the profundus facial trunk ; in addition it has inter- 

 linking branches with the myelonal trunk, and has communica- 

 tions with the pectoral sinus, the pericardial sinus, and the 

 cranial trunk. 



12. What is designated as the cephalic sinus in Scorflce- 

 nichthys may be only analogous to the similar sinus of other 

 fishes that performs the same function, but which has entirely 

 different connections and very different modes of termination. 

 With Scor-panichthys this is a non-contractile stomach-shaped 

 reservoir situated beneath or mesad to the upper portion of the 

 hyomandibular. Dorsad it tapers down into a sort of a papilla 

 that empties into the jugular directly behind the prootic process. 

 The orifice of this papilla is guarded by a valve, which opens 

 into the vein. In one way or another the lymph from the entire 

 body can reach this sinus ; the superficial facial lymphatic trunk 

 unites with its jugular papilla; the hyoidean sinus empties into 

 it from below ; and a connecting branch from sinus (s) of the 

 cranial trunk, which is also in direct communication with the 

 abdominal sinus, is received from above and behind. 



13. The pericardial sinuses, which surround the heart in 

 Scorficenic/ithys have been subdivided into 3 distinct reservoirs. 

 What has been designated as the main pericardial sinus is situ- 

 ated between the precava and the shoulder-girdle. It is in con- 

 nection above with the lateral lymphatic trunk, and sends off a 

 vecicle anteriorly that soon divides into 3 lobes, the most ante- 

 rior being in communication with the abdominal sinus and the 

 other 2 ending blindly. Some little distance below this level 

 the pericardial sinus is continuous posteriorly into what has been 

 described as the posterior pericardial sinus, which either ends 

 blindly or receives the profundus ventral lymphatic trunk. In 

 addition to all these connections it also receives from below and 

 in front a prolongation of the ventral pericardial sinus, a sinus of 

 considerable importance, which can always be separated into a 

 posterior and an anterior portion. The former receives the 

 ventral lymphatic trunk and the ventral prolongations of the 



