COMPAUATI\-E STITDY OP SCOMBROIP FLSHliS. 445 



know, ])ebif!:i(i nud does nut a])])roiu'h the coast. 



KrrAHARA (48) ideutifitxl tin's 8])ecie8 with Tliifnnm aild of S:hleoel 

 (67), but the latter author wiitea that the species is very :common, during 

 sujumer months, and is caught in hundreds at a time by means of nets of 

 large dimension. This statement is not jKleqnato for tlie ])rcseut species. 

 Moi*eover there are no decisive charmiters in the descri])tion by Schlegel, except 

 the long jiectoraLs and remarkable height of the Ixxly. Probably ScHLEGEr. con- 

 founded this species with NcoÜnmnm macropkrvs. CUNNiNonAJr (10) considers 

 this sixxdes to l)e identical with Thijnnus ohesiis Lowe of tlie Atlantic; bnt oiu- 

 si)ecies diflers from the latter in the colour of the second dorsal, and the anal 

 at least. Accoi*ding to Cunningham these fins have " some black at edges, 

 but httle or no 3-ellow." The descriptions of Thynnns ohesus by Lowe (52) 

 jvs well as Ccnningham are veiy incomplete. It is allitnl to the prtsent 

 species in having large eyes, and a short, thickset figitre. But as the other 

 important stnK^tnres of Thynnus dxsns Lowe are unknown, it is im]K)Ssible to 

 ascertain the relation between these two species. 



liecently the catch of tliis species is s.-ud to bwe much increased, due to 

 the use of long snootis among snaxls of normal length on a long line. The 

 lower end of these long snoods will hang in a layer of water, deejjer than 

 57 m under the sm-fac« of the sea. At present this sjiecies is very (»mmon 

 in the groimds ueai- the mouth of Tokyo Bay. 



Genas Neothunnus gen. nov. 



Cutaneous blood-vesi3els are found fi'om the segment of the seventh vertebra. 

 Posterior cardinal vein is united to the right CuvierLiu duct, and the former 

 vein is connected with a plexus of blood-vessels in the haemal canal, so that 

 the haemal arch is remarkably wide. The first haemal arch is found in the 11th 

 vertebra. On the exterior surfiice of the liver we find no juinute veins. 

 Caudal vertebrae elongated, and accordingly the caudal portion long. 



Key to the the Jaimnese species of the gemis Neothunnus. 



Air-bladder present, second dorsal und anal much elongated A", maaroplerus. 



Air-bladder absent, second dorsal and anal slightly higher than the 



first dorsal X rarus. 



