624 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
outer rays of caudal; all tins except ventral and pectoral of blind side irregularly spotted and mottled 
with black. The membrane has drawn away from the scales in our specimen leaving them light at base. 
The type is 155 mm. in entire length, taken at station 3708 in Suruga Bay. It is numbered 51406, 
U. S. Nat. Mus. Cotypes were taken at the same station, and at stations 3715, 3716, and 3717 in 
Suruga Bay, and at station 3725 in Owari Bay. Cotype No. 8389, Stanford University. 
DEXISTES Jordan & Starks, new genus. 
Dexistes Jordan & Starks, new genus of Pleuroncctidx (rikuzenius) . 
This genus differs from Pseudopleuronectes in having large scales, and large eyes narrowly separated 
by a high, sharp, naked interorbital ridge. Eyes and color on the right side. 
114. Dexistes rikuzenius Jordan & Starks, new species. (PI. 6, fig. 1.) 
Head 3.83 in length; depth 2.75; D. 73; A. 59; scales 64 (pores); upper eye 3.1 in head; snout 
from upper eye 4.83; maxillary of eyed side 3.83; of blind side 3; pectoral of eyed side 2; of blind 
side 3; ventral 3.1; highest dorsal rays 2.5; median caudal rays 1.5. 
Body moderately narrow; anterior dorsal curve slightly broken by the raised orbital rim; snout 
blunt; lower jaw projecting, and with a knob developed at symphysis below tip; eyes large, upper 
slightly the larger and placed farther back; narrowly separated by a high, sharp, naked ridge; mouth 
much larger on blind side; maxillary of eyed side reaching to opposite anterior edge of pupil; teeth 
blunt and not very even or closely set, in one moderately straight row except on blind side of lower 
jaw, where 3 or 4 are irregularly placed inside the row; gillrakers short and triangular, 7 on lower 
limb of arch, 1 developed and 2 rudimentary ones on upper limb; scales large and ctenoid on eyed 
side, cycloid on blind side; spinules on scales very slender, sharp, and numerous; a few" scales on 
anterior part of interorbital where it widens on snout; upper eye with a patch of ctenoid scales, each 
with 2 or 3 spinules; a row of small scales running out on each fin ray; lateral line without an arch, a 
branch of it curves down behind eyes and around lower edge of lower eye; dorsal beginning above 
middle of eye; pectoral of eyed side longer and more pointed than that of blind side; ventrals equal 
in length, the last rays the longest; median caudal rays produced, upper edge obliquely truncate, lower 
slightly concave. 
Color brown, with a few irregular inconspicuous dark brown spots, one on lateral line at beginning 
of its posterior two-fifths, one near base of caudal, one below middle of lateral line, one near top of 
pectoral; small ones show little color except a few brown spots, the one on lateral line the most 
conspicuous. 
The type from which this description is taken is 22 cm. in length, and was taken at station 3774, 
in Matsushima Bay, in 84 fathoms. Two small cotypes were taken at station 3717, off Ose Point, 
Suruga Bay, in 65 to 125 fathoms. 
The type is No. 51423, U. S. Nat. Mus. A cotype is No. 8388, Stanford University. 
115. Araias ariommus Jordan & Starks, new genus and species. (PI. 6, fig. 2.) 
Head 3.8 in length; depth 2.6; I>. 71 to 74; A. 57 to 60; scale 60; upper eye 2.8 in head; snout 
from upper eye 4.33; maxillary 3.75; pectoral of eyed side 1.87; of blind side 2.75; caudal 1.16. 
Kim of upper orbit very slightly protruding above rest of upper profile; eyes separated by a 
narrow sharp ridge; anterior rim of lower scarcely or very slightly anterior to that of upper, pos- 
terior rim anterior to that of upper (to a greater degree in the type than in cotype); mouth very 
small, considerably larger on blind side, the maxillary reaching to just below anterior edge of orbit; 
teeth blunt, set in a single, very irregular row, those of lower jaw projecting around on eyed side 
farther than those of premaxillary; gillrakers short and triangular, 3-)- 7 on first arch; dorsal begin- 
ning above middle of upper eye; pectoral of eyed side a little longer and not so bluntly rounded as 
that of blind side; caudal doubly truncate, median rays the longer; lateral line not arched, gradually 
curved up anteriorly; scales cycloid, with occasionally a ctenoid scale with long irregular spinules 
(as the spinules are easily broken, leaving no trace, it appears probable that the scales may have all 
been ctenoid); a few small scales running out on fin rays. 
Color light pinkish brown, without definite markings; dorsal, anal, and caudal with very faint 
wavy cross marks. 
Two specimens taken in Matsushima Bay, at stations 3770 and 3773. The type is the larger, and 
is 13 cm. in length. It is No. 51417, U. S. Nat. Mus. The other from station 3773 is No. 8386, Stanford 
University. 
The new genus Araias is technically near Pleuronectes, differing in its thin, scarcely ctenoid scales 
and in its fragile body. 
