FISHES FROM BIWA. 



163 



2. Leucogobio jordani* C. Ishikaioa. 

 Pl. III. Fig. 2. 



D. 10. A. 7. V. 8. L. lat. 39-10. L. transv. 5J/44. 



Total length 78 ; length of the head 26 ; length of the snout 5 ; 

 length of the eye 4 ; length of the tail 19 ; length of the pectoral 11 ; of 

 the ventral 10 ; height of the body at the root of the dorsal 12 ; width of 

 the interorbital space 6. 



The height of the body is nearly one-sixth of the total length, the 

 length of the head one-third. Head relatively long, with the snout a 

 little longer than the eye which is a little less than one-sixth the length 

 of the head, and two-third of the width of the interorbital space. Mouth 

 anterior, deeper than wide, its corner being half-way between the end of 

 the snout and the anterior border of the eye. Barbels minute, about 2/3 

 of the diameter of the pupil. The origin of the dorsal fin is slightly in 

 advance of the root of the ventral, and just in midway between the end 

 of the snout and the root of the caudal. 



Pectoral fin about one-half the length of the head, without snout, 

 terminating a long way from the root of the ventral. Ventral fin shorter 

 than the pectoral and terminating in front of the vent. Caudal fin very 

 deeply emerginate. 



There are about three series of scales between the lateral line and the 

 ventral fin. Silvery, back dark brownish, a bluish-black band on the side 

 of the body just as in the preceding species. A small triangular spot of a 

 deeper colour at the root of the caudal fin is very distinctly to be seen in 

 small individuals just as in L. güntheri. Pharyngeal teeth 5 or 6/3-3/6 

 or 5, hooked at the end. Intestinal tract with only a single convolution. 

 Peritoneum with a few pigments of brownish colour. Number of verte- 

 brae 33, of which 14 enter into the tail. 



A single specimen was obtained at Shiwotsu in the month of 

 December 1898. Two other specimens of smaller size were also found 

 in our former collections from Matsubara. 



* Dedicated to Prof. David S. Jordan of the Stanford University, U. S. A. 



