54 ALLEN 



there are at least 3 pectoral lymphatic trunks emptying into the 

 cephalic sinus. Secondary branches are noted as anastomosing 

 with the intercostals, and a sinus (vaso collettore) is spoken of 

 as lying at the base of the rays and forming a ring about every 

 ray. Lymphatic vessels are described as running along the 

 surface of the rays and collecting the rich network from the 

 skin. It will be seen from Trois' description that the lymphatics 

 of the fin itself correspond somewhat with the arrangement in 

 Scorpcenichthys, but as regards their mode of termination there 

 is nothing in common. 



Dorsal lymphatic trunk (Figs. 1 and 4, D.L. V.). — Hyrtl 

 and Vogt seem to have overlooked this canal. Stannius (24, 

 p. 253) says that this trunk can be divided into 2 subordinate 

 stems. First a vessel is described as running along the angle 

 of the intermuscular septa, and a vessel is noted as passing 

 along between the upper border of the great lateral muscle and 

 the longitudinal muscle of the dorsal fin, which would place 

 it at the base of the dorsal fin. Cross-branches are said to 

 exist between the 2 trunks, and the second trunk receives 

 numerous branches that followed along the rays. The first 

 dorsal trunk of Stannius is undoubtedly the same as that de- 

 scribed by Trois and myself as the most dorsal of the secondary 

 lateral lymphatic trunks. Trois (28, p. 6) and Sappey (25, 

 p. 47) describe the dorsal trunk in Lophius and the pike as a 

 knotty vessel that separates into 3 distinct trunks upon reaching 

 the dorsal fin, two of which run laterad to the base of the rays, 

 while the third, more slender, passes through the holes in the 

 base of the rays. Two vessels for each ray collect the lymph 

 from the fin and empty into the median trunk. With Uranoscopus 

 (29, p. 23) the anastomosis with the neural or interspinal vessels 

 was noted. Hopkins (8, p. 373) describes this trunk in Amia 

 as anastomosing with the lateral trunk before terminating in the 

 caudal sinus, while anteriorly it bifurcates at the base of the 

 skull, each fork emptying into a cephalic sinus. 



The description given of the dorsal longitudinal lymphatic 

 trunk by Trois for Lophius and Uranoscopus will also answer 

 very well for Scoj-pcenichthys. In the region of the dorsal fins 

 this canal separates into three longitudinal trunks, two of which 



