742 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



4 — 2 oil the right. Those of tlie nmjor row high, coinpi-esscd side- 

 wise; the one near the longer straight linil) of the arch somewhat 

 rounded and short; one or two teeth on each side slightly hooked; 

 grinding surface present, though not \'erv broad. Teeth of secondary 

 row slender, easily displaced; one on each side showing traces of a 

 grinding surface. Peritoneum silvery. Air-bladdtu- large, witli one 

 constriction; alimentary canal short, without convolutions. 



Head naked, without barbels or other distinctive dermal characters. 

 Bodv with scales of medium size. Lateral line complete, not extend- 

 ing on caudal tin; the anterior part bending downward parallel with 

 the ventral t-ontour; posterior })art of lateral line in nnddle of caudal 

 peduncle. 



Dorsal inserted midway between center of eye and )>ase of caudal 

 tin; the first ray very short, simple, and closely iidnate to the second; 

 third ray longest. Anal inserted a little posterior to base of dorsal, 

 its base short; first simple ray similai- to that of dorsal; thii-d ray 

 longest; tips of rays when iin is depressed falling far short of bas(» of 

 caudal. Pectoral tins rather pointed. Ventrals rounded, reaching 

 anal opening. 



Body a little darker above than below; a faintly defined, narrow, 

 lighter ])and along the sides, not visible anterior to the dorsal tin. 



One of the cotypes (No. t),37»), Lelaiid Stanford Jr. I'niversity Col- 

 lection) has three teeth on one side in the lesser row. 



The c()ll(H't()r\s notes do not state whether the species was found in 

 salt oi- fresh water, a question of interest, since the island of Tsushima 

 is said to contain oidy 262 square miles, about one-third of which is 

 cutoff from the larger part l)y a narrow chaimel. Leuc!.<ici(s Jidl-nrnsts 

 is able to live in salt Avater, the authors having found it in tide pools 

 and otfshoi'i^ at s(»veral points along the coast of Japan. 



Meoimrements of Leuci'icnis jouyi. 



Length of body in millimeters 



Deptli of bodyexpressed in hundredths 



of length 



Depth of ear.dal peduncle 



Length of head 



Depth of head at oceipiit 



Width of interorbital space 



Length of snout 



Diameter of orbit 



Distance from snout to dorsal tin 



Height of longest dorsal rays 



Distance from snout to anal tin 



Height of longest anal rays 



Distance from anal to caudal tin 



Length of caudal fin 



Distance from snout to ventral (in 



Length of ven^tral fin 



Leiigt h of pectoral tin 



Number of rays in dorsal flu 



Number of rays in anal fin 



Number of rays in pectoral tin 



Number of scales before insertion of 



dorsal fin 



Number of scales in lateral lii\e. 



Number of scales above laterarline 



.14 

 .26 

 .15 

 .10 

 . 085 

 .05 

 .56 

 .18 

 .67 

 .15 

 .25 

 .25 

 .52 

 .14 

 .17 

 s 

 ,s 

 U\ 



41 



68 

 18 



.17 

 .25 

 .255 

 .47 

 16 

 .18 

 8 

 8 

 16 



42 

 68 

 17 



.15 



.245 



.25 



.54 



.145 



.18 



8 



7 

 15 



45 

 69 

 19 



.23 

 .13 

 .26 

 .16 

 .09 

 .08 

 .06 

 .58 

 .18 

 .68 

 .15 

 .25 



.24 

 .14 

 .26 

 .17 

 .09 

 .08 

 .07 

 .56 

 .19 

 .67 

 .15 

 . 25 

 . 27 

 ,54 

 .14 

 .18 

 8- 

 8 

 16 



40 



68 

 19 



