DISTRIBUTION OF LYMPHATICS IN SCO k I'.K \ K UTII YS 5 I 



verse branches, the most cephalic of which is a large ventral 

 sinus to which the name pectoral sinus has been given. Pass- 

 ing under the pectoral arch it follows along in front of the first 

 rib across the anterior fork of the kidney. About half way 

 across the kidney it receives a communication from the pericar- 

 dial sinus (Figs. 4, 5 and 6, Per.S.), and when the atlas is 

 reached unites with a fork of the myelonal or longitudinal spinal 

 lymphatic trunk, the point of junction being marked by quite 

 a large reservoir, designated as the occipital sinus (Figs. 4 and 

 5, Oc.S.). From here on the combined trunk thus formed is a 

 distinct profundus vessel designated as the cranial lymphatic 

 trunk (Figs. 4 and 5, Cr.L. V.). This vessel finally empties 

 into the cephalic sinus, and is described in detail further on 

 under a separate paragraph. 



Had the lateral trunk in Scorpcenichlhys, after having passed 

 under the clavicle, curved downward without expanding into a 

 sinus and emptied into the jugular, we would have the condi- 

 tions as described for the carp and pike by Sappey (25). Had 

 the lobe of the kidney not extended so far cephalad and the 

 occipital sinus been located in front of the precava a little below its 

 present position in Scorpcenichlhys, and received the branchial, 

 hyoidean, and facial trunks, but not the myelonal, it would have 

 answered to Vogt's description of the anterior termination of the 

 lateral canal in the cephalic sinus with the salmon (1) ; provided 

 that this sinus emptied into the precava. Finally, had the 

 lateral trunk of Scorpcenichthys continued to the base of the 

 skull, without receiving the myelonal trunk and the pericardial 

 sinus, but collecting the branchial, facial and hyoidean trunks, 

 and had sinus (s) emptied into the jugular we would have had 

 the conditions met with in Cyprinus, Leuciscus, Esox, Acipen- 

 ser, etc. It is of special interest to note in this connection that 

 Hyrtl and Milne-Edwards have vaguely described 2 anterior 

 communications from the lateral lymphatic trunk with the venous 

 system in Cottus gobio, a species belonging to the same family 

 as Scorpcenichthys . 



The intermuscular or transverse vessels (Figs. 1, 2, 4 and 5, 

 Intm. V.) described by Hyrtl, Stannius, Milne-Edwards, Trois, 

 Sappey, Hopkins, and which Vogt took to be extravasations of 



