63 William F. Allen 



Yogi found no transverse branches uniting with the lateral trunk, and 

 he was of the opinion that such vessels were onty extravasations of the 

 injecting mass. Trois' description of the caudal ending of the lateral 

 trunk in Lophius (op. cit., p. 5) and that of Sappej' for the pike and 

 carp (op. cit., pp. 46-7) are very similar to what Hyrtl found for the 

 perch. 



Concerning the Ganoids, Hopkins (op. cit., p. 373) notes that the 

 lateral lymphatic trunk in Amiatus (Fig. 11, 1.) extends candad as far 

 as the posterior end of the dorsal fin, where it suddenly bends at right 

 angles toward the meson, to terminate in a caudal sinus, which lies 

 beneath the vertebral column and empties into the caudal vein. Just 

 as the lateral lymphatic trunk bends to empty into the caudal sinus it 

 receives a connecting branch (Fig. 11, t) from the tail portion of the 

 ventral trunk (o), and immediately before uniting with the caudal 

 sinus it is joined by the dorsal trunk, or, as represented in Fig. 11, a 

 fork of the dorsal (r). 



In Lepisosteus there is but one lateral subcutaneous trunl; (Figs. 1-5, 

 8, 10-18 and 25, L. T.) on each side of the body. It occupies a like 

 position to a homologous canal of other fishes, which is in a median 

 lateral line, in a sheath of connective tissue, just within the skin. The 

 anterior connections of the lateral trunk in Lepisosteus have been given 

 in a previous paper (op. cit., p. 113). As with other fishes, it collects 

 numerous paired intermuscular or transverse hranclies (Figs. 1 and 3, 

 Intm. C), which travel along superficially in the connective tissue, 

 joining two myotomes, and gather a network of vessels from the con- 

 nective tissue that binds the skin to the trunk muscle. Doubtless these 

 vessels are continued dorsad and ventrad to anastomose with the dorsal 

 and ventral trimks as in Scorpaniclithys and other bony fishes, but this 

 point remains undetermined. Wlien about half way between the pos- 

 terior end of the dorsal fin and the base of the tail, the lateral trunk 

 bends mesad, at right angles, to culminate in, and help form, what has 

 been designated and described as sinus (x). Ordinarily, as shown in 

 Figs. 1, 3, 4, 5 and 6, the lateral trunk joins the haemal in forming 

 sinus (x), but in Fig. 3, which is the opposite side of the same specimen 

 as Fig. 1, the lateral trunk did not join sinus (x) until after it collected 

 the dorsal trunk. In fact, the point of union was considerably behind 

 that of the dorsal trunk, being almost opposite the opening of sinus (x) 

 into the caudal sinus. A description of the union of the htemal and 

 the dorsal trunks with sinus (x) and the culmination of the latter in 

 the caudal sinus has already been given under a separate paragraph. 



