e. i'orafugu i Sp{;aeroides rubripes I. et S») (Tetraodontidae) 



This species has onl;y the subcutaneous veins » The vessels originate 

 from the kidneys and run posteriorly, ending near the anus o 



The examples cited above show clearly that, although there are various 

 differences as between species, there are teleostean fishes which have 

 remarkably developed subcutaneous blood vessels 



V. The Subcutaneous Blood vessels of the Plecostei and of the 

 Teleostei Are in the Broad Sense Identical <, 



Although Kishinouye claimed that subcutaneous blood vessels are lack- 

 ing in the Teleostei and are found only in the Plecostei, if the subcutane- 

 ous blood vessels are as he described them it would be very unreasonable 

 to deny their existence in teleostean f ishes „ As explained above, there 

 are among the Teleostei many species having vessels which present the 

 same conditions seen in the subcutaneous vascular systems of the Plecostei,, 

 furthermore the differences between the vessels seen in these teleosts and 

 the subcutaneous vessels of the rlecostei are much slighter than the 

 differences between the subcutaneous vessels of certain species within 

 the Order Plecostei (for example between Ihunnus orientalis and Auxis ma ru ) 

 Although it has been impossible for the reasons given above to find out 

 the points of origin of the subcutaneous arteries and veins in the broad- 

 bill swordfish, in all other respects these vessels are identical 

 respectively with the posterior part of the subcutaneous arteries and 

 with the dorsal subcutaneous veins of the genus Auxis o 



The subcutaneous veins of Gnathagnus elongatus are completely 

 identical with the ventral subcutaneous veins of the genera Auxis and 

 Euthynnus , and although the subcutaneous arteries of the former differ 

 with regard to their point of origin from the posterior subcutaneous 

 arteries of the latber, they are completely identical on all other 

 points o 



The subcutaneous veins of the dolphin, except for the fact that they 

 are simple and that the left and right vessels are joined at their posterior 

 ends, ore on all other important points completely identical with the sub- 

 cutaneous veins of the genus Thunnus » 



The subcutaneous veins of Sphaeroides rubripes are identical with the 

 dorsal subcutaneous veins of the genera Euthynnus an d Auxis o 



Even though the subcutaneous vessels of the teleostean fishes cited 

 as examples here are not in the strict embryological sense identical with 

 those of the Plecostei, there is no obstacle to regarding them both as 

 the same and calling them both subcutaneous vessels according to the 

 writings and views of Kishinouye- This is because Kishinouye himself 

 lumped together nonhomologous vessels and vessels which differ markedly 

 in their areas of distribution, conditions of origin, and relations to 

 the dark red lateral tissues and applied to all comparatively conspicuous 

 vessels which appear in the subcutaneous tissues in the vicinity of the 



11 



