Oshima: Fishes of the Family Mugilid^. 2-H 



Key to Genera Found in Formosa. 



a. Anal spines three ; stomach gizzard-like. Species marine. 



a'. Adipose eye-lid well developed, covering at least a third of the iris 



posteriorly Mugil, i. 



a". Adipose eye-lid not developed. 



b. Upper lip thick, moderately developed Liza, 2. 



bb. Upper lip greatly thickened Chelon, 3. 



I. Genus Mugil (Artedi) Linnaeus. 



1758. Mugil (Artedi) Linn^us, Syst. Nat., Ed. X, p. 316. (Type, Mugil 

 cephahis Linn.f.us.) 



Body oblong, compressed, covered with large cycloid scales. Mouth 

 more or less transverse ; the upper lip moderate ; anterior margin of 

 the mandible sharp. Both jaws with a few series of small, flexible, 

 ciliiform teeth. Eyes lateral, each with well-developed adipose eye- 

 lid. Stomach gizzard-like. Anal fin slightly longer than the second 

 dorsal. 



Distribution: Migratory fishes of all the temperate and tropical 

 regions, often entering rivers. These fishes are known in Japan as 

 Bora. 



Key to Formosan Species of Mugil. 



A. Anal fin with eight soft rays. 



ai. Median dorsal line not carinated. 



&i. Mandibular angle obtuse; extremity of maxillary entirely hid- 

 den ; adipose eye-lid well developed, covering the iris, 

 ci. 40-42 scales in a lateral series ; depth less than 5 in the 



total length cephalus, i. 



c2. 38-39 scales in a lateral series ; depth more than 6 in the 



total length japonicus, 2. 



fc2. Mandibular angle obtuse ; extremity of maxillary exposed ; adi- 

 pose eye-lid thin, not covering the iris. 



ci. 28 scales in a lateral series anpinensis, 3. 



a2. Median dorsal line carinated in front and back of the spinous dorsal. 

 &i. Mandibular angle obtuse ; 38 scales in a lateral series. 



carinatus, 4. 



B. Anal fin with nine soft rays. 



d. 33 scales in a lateral series ; extremity of maxillary en- 

 tirely hidden ; pectoral nearly as long as head, extending 

 to the spinous dorsal kelaartii, 5. 



