564 



BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



According; to the data available, M. nigrescens appears to have a 

 more northern distribution than M. adustus. M. nigrescens is a 

 close ally of the Hawaiian M. acipenserinus and of the Panamaic 

 M. tenuicauda. 



Genus TRACHONURUS Giinther. 



73. TRACHONURUS VILLOSUS (Giinther). 



Trachonurus villosus Gilbert and Hubbs, Proc. U. S. Nat. Mus., vol. 51, 

 1916, p. 205 (description of Japanese material, with synonomy). — Weber, 

 Fische der >s'/7jo<7« -Expedition, p. 105, pi. 5, fig. 2. 



List of stations. 



Albatross 

 station. 



Locality. 



Number 

 of speci- 

 mens. 



5123 

 5124 

 5348 

 5373 

 5407 

 5410 

 5423 

 5425 

 5492 

 5494 

 5512 

 5513 

 5528 

 5533 

 5586 

 5587 

 5646 

 5648 



East coast of Mindoro 



do 



Palawan Passage 



Vicinity of Marinduque Island . . 

 Vicinity of Dupon Bay, Leyte. . 



Between Cebu and Leyte 



Jolo Sea (Sulu Sea) 



do 



Between Leyte and Mindanao... 



do 



Vicinity of northern Mindanao . . 



do.; 



Between Siquijor and Bohol 



Between Cebu and Siquijor 



Vicinity of Sibuku Bay, Borneo. 



do 



Buton Strait 



....do 



The range of depth and bottom temperature inhabited by this spe- 

 cies is remarkably wide for a Macrouroid fish of tropical seas. 



We can detect no differences of importance among these specimens, 

 nor between them and Japanese material. 



Genus CETONURUS GUnther. 



74. CETONURUS ROBUSTUS Gilbert and Hubbs. 



Cetonurus robustus Gilbert and Hubbs, Proc. U. S. Nat. Mus 

 1916, p. 207, pi. 11, fig. 2. 



List of stations. 



vol. 51, 



Between these East Indian specimens and the type material from 

 Japan no specific differences can be detected. 



