186 



Annals of the Carnegie Museum. 



pair are the longest, about 1.2 in the length of head; gill-openings low; 

 gill-membranes entirely separated; gill-rakers 4 + 14, slender and 

 pointed. 



Dorsal fin very long, originating at anterior third of body without 

 caudal, extending posteriorly to the base of the caudal; anal fin long, 

 inserted slightly posterior to a point midway between tip of snout and 

 base of caudal; pectoral fin armed with a strong, short spine, which 

 has a fine serration below the skin; the ventral very small, its tip 

 reaching beyond base of anal fin; caudal fin separated from the dorsal 

 and anal; rather long, the tip rounded. 



Body naked, with numerous undulating vertical striations on the 

 sides; lateral line descends a little at the commencement and runs 

 straight at mid-height. 



Color in formalin uniformly dark brown, lower parts whitish; 

 sides with about eight vertical rows of minute white spots, descending 

 from the back to the lateral line, and two or more longitudinal rows of 

 the same below the lateral line. 



Total length 192 mm. 



The present description from a specimen from Jitsugetsutan, 

 collected by T. Aoki, in August, 1916. 



Habitat: Very common in the fresh waters of Formosa. My 

 specimens came from Jitsugetsutan (Lake Candidius) ; Taihoku; 

 Tamusui River near Shinten; Maruyama near Taihoku; Giran. 



Measurements of Clarias fuscus. 



Locality. 







Jitsugetsutan. 

 Jitsugetsutan. 

 Maruyama. . 

 Maruyama . . 

 Maruyama. . . 

 Giran 



1.20J 2 

 i.i6| 1. 75 

 1. 14 1.83 

 1. 12 1.86 

 1.20 2 

 1.60I 1.8 



3 |I2 

 2.33 10 

 2.28 11.66 

 2.36 10.33 

 2.55 10 

 2.50 10.33 



192 

 100 

 162 

 132 

 no 

 218 



Remarks: In the year 1908, Mr. C. Tate Regan described a new 

 catfish from Kagi, Formosa, giving it the name Clarias saiiteri, and 

 made the following statement: "C. saiiteri is close to the Chinese 

 C. juscus Lacepede, which differs notably in having villiform teeth 

 on the palate." It is observed, however, that large specimens of 

 C. Juscus are pro\ide<l with more or less enlarged vomerine teeth, 



