196 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxi. 



anterior curve. Fin ra3^s and vertebrse numerous, as in the halibut. 

 Two species known, arctic fishes, in some degree intermediate between 

 the true halibut and Ather<sth(s. 



(Named for Prof. Johanu lieinhardt, of the University of Copen- 

 hagen, an able investigator of the fishes of Greenland). 



24. REINHARDTIUS MATSUURiE Jordan and Snyder. 



Hippoglossus grcenlandicvs Ishikawa and Matsu'ura, Prel. Cat., 1897, p. 25 



(Sagami Bay). (Not of Authors. ) 

 Reinhardtius matsuurie Jordan and Snyder, Journ. Coll. Sci. Imp. Univ., XV, 



1901, p. 309, pi. XVI, figs. 7, 8 (Sagami Bay). 



Habitat. — Sagami Bay, probably in deep water. 



Head, \\ in length; depth, 3^^; dorsal, 96; anal, 69; scales, 117. 



Body dextral; interorbital width 3 in maxillary; a little less than 

 longitudinal diameter of lower e3'e; cleft of mouth same on both sides; 

 lateral line single, not sharply curved anywhere, running obliquely 

 downward to a point a little a})ove middle of body and posterior to 

 base of pectoral a distance equal to 2 times length of niaxillar}^, then 

 straight backward to end of caudal fin, similar on blind side; dorsal 

 fin inserted just behind eye; anal inserted below 26th dorsal ray; dor- 

 sal and anal extending an equal distance posteriori}^; length of caudal 

 peduncle 2^ times in head; minute scales on intcrradial membrane of' 

 both dorsal and anal; length of pectoral equal to maxillary. 



Color plain brown. 



A stuffed specimen about li feet long, No. 156, Imperial Museum, 

 Tokyo. Localit}^ Misaki. This species is allied to Reinhardtius. hip- 

 poglossoide.s, the Greenland Halibut, diflcring in the larger scales and 

 in other characters. No second specimen is known. 



(Named for Mr. K. Matsuura, curator of fishes in the Imperial 

 University Museum at Tokyo.) 



IS. ATHERESTHES Jordan and Gilbert. 



AtheresthcH ioKYiAS and Gilbert, Pror. U. S. Nat. Mus., 1880, j). 51 {sloiirias). 



Eyes and color on the right side. Body ver}^ long and slender, 

 closely compressed, tapering into a long and slender caudal peduncle; 

 head elongate, narrow; mouth extremely large, oblique; the long and 

 narrow maxillarj^ extending beyond the eye; each jaw with 2 irregu- 

 lar series of sharp, unequal, arrow-shaped teeth, some of them long 

 and wide set, and others short and close set, sharp; the long teeth 

 freely depressible. Gill rakers numerous, long, slender, and stiff, 

 strongly dentate within. Scales rather large, thin and readily decidu- 

 ous, slightly ciliated, those on the blind side similar, smooth; lateral 

 line without arch. Fins low and fragile; dorsal beginning over the 

 eye, its anterior rays low, the posterior rays somewhat forked; no 

 anal spine; pectorals and ventrals small, both of the latter lateral; 

 caudal lunate. 



