Zool.— Vol. I.] JORDAN— NEW SPECIES LAMNOID SHARK. 201 



than second dorsal and rather lower; no caudal keel; no pit at root of caudal; 

 lower lobe of caudal long and rather high, with a sharp notch near its tip. 



Color light reddish gray, brownish above; the fins darker brown; nuchal 

 region a little darker; belly paler. 



The genus is apparently unique among living forms, its 

 nearest relative being apparently the genus Carcharias 

 of Rafinesque, which is Odonlasfiis of Agassiz. This 

 group contains few recent sharks, but is rich in fossil 

 forms. Unless place can be found for it in some family of 

 fossil species, it must stand as the type of a distinct family 

 Mits ukurin idee . 



I take great pleasure in associating this remarkable animal 

 with the name of my honored friend and colleague, the dis- 

 tinguished Professor of Zoology in the University of Tokio, 

 with the Hon. Shiro Fujita, joint representative of Japan 

 in the International Conference of 1897 in the interest of 

 the protection of the fur seals. 



The specific name, in recognition of Mr. Owston's inter- 

 est in his discovery, is given at the request of Professor 

 Mitsukuri. 



LELAND STANFORD JUNIOR UNIVERSITY, 

 CALIFORNIA, 



January, 1S98. 



