C. Classification 



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 Jordan and Evermann — have been taken as the standard for classification. 



Classification of the families 



a. Ventral fins present with 1 to 3 rays, scales developed, all rays of the dorsal fin 

 externally developed even after maturity. Two pairs of keels of equal size on both sides of the 

 caudal peduncle. Teeth very small and firmly attached, sword-shaped portion of upper jaw 

 narrow and almost round in cross section. Left and right branchiostegal membranes fused 

 together Istiophoridae 



b. Ventral fins absent, scales not developed. The nnost posterior rays of the first dorsal 

 fin disappear after maturity. The caudal peduncle has a single pair of very large keels, and the 

 teeth are lost after maturity. The sword-shaped portion of the upper jaw is broad and long and 

 elliptical in cross section. The left and right branchiostegal membranes are not joined together 



Xiphiidae 



a. Family Istiophoridae 



Classification of the genera 



a') Dorsal fin not remarkably high, anterior lobe small, whole dorsal fin well developed. 

 Body slender, upper jaw short, no spots on sides of the body. Ventral fin somewhat 

 developed Tetrapturus 



a'a') Dorsal fin remarkably developed, ventral fins long, snout long, body slender with spots 

 on the sides Istiophorus 



a'a'a') Dorsal fin low, its anterior lobe large, sinterior spines stout. Ventral fins generally 

 poorly developed, body stout, spots may be present or absent on the sides 

 Makaira 



Genus Tetrapturus Rafinesque*, furaikajiki genus 



Jordan and Evermann record six species for this genus, five of them from the Indo-Pacific 

 region. However, those taken in Formosa all belong to the following single species. 



1) Tetrapturus angustirostris Tanaka, furaikajiki /shortnosed spearfish/ 



Plate 13, figure 1 (no Formosan nsime) 



Tetrapturus angustirostris --Tanaka, Shigeo. Japanese Ichthyology, p. 375, 1921. 



Tanaka, S. Fishes of Japan, 1, 2d edition p. 324, 1935. 



Jordan and Evermann. Occ. Papers Calif. Acad. Sci. XII, p. 31, 1926. 



Morphology - D. III. 11-13, XXXV-XXXVII, 6. A. II, 12., 7. V. I, 2. Vertebrae - 24 (12+ 12) 



Body slender and not very large, specimens over 20 kg. being rare. Body length 6. 88 

 times body depth (measured around the sides of the body), 7.9 times body depth at the origin of 

 the first anal, and 6. 28 times the length of the snout. Length of snout 1. 39 times head length 



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— Jordan and Evermann. Occ. Papers Calif. Acad. Sci., XII, 1926. 



* Rafinesque. Caratteri di alcuni nuovi generi e nuove specie di ajiimali e piante della 

 Sicilia, 1810. 



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