Mixed with skipjack, and in eastern Honshu they are called kitne.11 . 



The flesh is pink and firm, and the flavor is very fine. 



Thunnus raras 'n.cp. ( koshinaeMi ) 



D. 13, U, 9. A. U, 8. Gill-rakers 6/17. 



Head and eye small, snout short, tail long, body broad. There is no air blad<i» 

 der. The foramen of the haemal arch is broad and enveloped in bundles of eapllla* 

 ries originating from the arteries and veins. The pectoral fins are short. 



The belly is gray with slender iriiite spots arranged in irregular rows. 



Only one specimen of this species was obtained. It had been brought tnm 

 Nagasaki to the Nihombashi Pish Market. It was 2 ahak^ A J32B [28.8 inches]) long 

 and WBighed 1 kan 4.60 momme Cl2ol pounds). Its ovaries were enlarged, and there 

 were two mackerel about 8,4, inches long in the stomacho 



Kben a drawing of this fish was shown to Mr. Heibei Kodama, a fish dealer, he 

 said that it is taken very rarely in large pound nets in Kyushu during the winter, 

 that It grows to a weight of about 25 pounds, and that it is called tongari by the 

 fleh dealers. ?lhen the drawing wa£: shown to Mr. Kodama 's assistant, he gave the 

 sane information. Probably this is a rare species with a restricted distribution, 

 and for this reason there has been no mention of it in the past literature, 



F^om the general appearance and the structure of the fish there is no doubt 

 that it is a new species, 



Katsuwonus n, g, (katsuo»zoku) 



In the past the kats^ o has been included in the genus Euthvnnas [ yaito-^ ok y ]* 

 but an examination of its osteology, circulatory system, and so forth makes it ap- 

 pear proper to place it in a completely separate gevis. Its position is between 

 the genus Thunnus and the genus Ei^thynnus . There are 20 thoracic vertebrae, the 

 same number as in Euthvnnus. and 21 caudal vertebrae, the same number found in 

 Thunnuff. The genus comprises only the one species of the skipjack [katsdo] , 



Katsuwonus pelqiiys (katauo) 



D, 12 - 17, U - U, 8. A, 11 - 15, 7. Vert. 20/21. Gill-rakers 19 / 39. 



This species is easily recognised by the four or more longitudinal stripes on 

 the sides. The gill-rakers are fine and numerous, and their inner aides have an 

 undulating outline. The bundles of capillaries from the vein and artery ventral to 

 the spinal column are thlok and are enclosed in a kind of cage formed by the es- 

 pecially developed haemal spines. This part of the fish is commonly called the 

 '^^Qg^Ul Cblack bloody tissue^l. There is no air bladder. 



This species prefers warm clear waters, and its dlatrlbutlon la world-wide. 

 It attains a length of over 3 feet and a weight of 49,6 pounds. It apparently 

 apawns in pelagic waters around August, 



-12- 



