LYMPHATICS IN TAIL REGION, SCORP^NICHTHYS 19 



brae in a caudal sinus that empties into the caudal vein. In 

 Lepisosteus I found in the caudal peduncle region (p. 62, and figs. 

 1-5) that the lateral trunk bent mesad, and in anastomosing with 

 a haemal trunk, formed a sinus on the vertebral column, desig- 

 nated as sinus (x) , which opened into a caudal sinus that emptied 

 into the caudal vein. 



Regarding the Teleosts, Hyrtl (pp. 233-5, and figs. 1-5) and 

 Vogt (pp. 135-6, and pi. K; figs. 3-5, 66) found in Lucius, Leucis- 

 cus, and Salmo that each lateral lymphatic trunk terminated be- 

 hind the last vertebra in a caudal sinus. The former observed 

 that the caudal sinus received the longitudinal neural lymphatic 

 trunk in addition, and both found these sinuses to empty into the 

 caudal vein. Likewise Stannius (p. 254) portrayed the lateral 

 and the longitudinal neural lymphatic trunks as ending in a cau- 

 dal sinus, which emptied into the caudal vein. Trois (pp. 5, 9, 

 20-22, 39, 51-2) described in great detail the distribution of the 

 lateral trunks in Lophius piscatorius, Uranoscopus scaber, and in 

 several of the Pleuronectidae, but concerning the caudal ending, 

 has nothing to add to Hyrtl's description. Sappey (pp. 46-7; 

 pi. xi, figs. 4-5, and pi. xii, fig. 2) represented each lateral trunk 

 in the carp and pike as terminating in papilla opposite the last 

 vertebra, which communicates with a fork of the caudal vein. 



Taking Tinea vulgaris as a type, Favaro (pp. 182-6, and fig. 84) 

 portrays an entirely different termination of the lateral lymphatic 

 trunk than has been observed before in Teleosts. He finds them to 

 end in two caudal sinuses, one situated behind the last vertebra, de- 

 signated as the atrium cordis caudalis, and the other situated at 

 the base of the tail, the sinus lymphaticus caudalis, which through 

 the medium of the caudal lymphatic trunk communicates with 

 the former sinus. The atrium is said to be connected mesad with 

 a parallel sinus, the ventriculus cordis caudalis, which discharges 

 its contents into a swelling of the caudal vein, the sinus venosus 

 caudalis. With Lucius lucius, Favaro's representation (pp. 198-9 

 and fig. 107) of the ending of the lateral lymphatic trunk is quite 

 different from his type described above and from Sappey 's de- 

 scription of the same. Here the lateral trunks are continued to 

 the tail, but have no communication with the sinus lymphaticus 



