Hypomesus olidus (Pallas) 
“ Wakasagi " 
PL. XIII, fig. 5. Cal 
D. 8, to 9; A. 16; scales 57, 
Length of body equal to 4 '/, times that of head, 
and to 5'/, times depth of body. Shape of body 
rather elongated and compressed, and covered with 
rather large and thin scales. Mouth rather small ; 
maxillary extending to below middle of pupil; 
has minute teeth in jaws, and on vomer, palatines, 
pterygoids, and tongue.  Ventral fins inserted im- 
mediately below, or anterior to, anterior rays of 
dorsal fin. Colour of body light-yellow above and 
silvery below ; on lateral sides of body it has a 
broad darkish longitudinal band. The fish at'ains 
to 110 mm. in length. This species occurs abun- 
dantly in northern Japan, but lately it has been 
introduced into, and suecessfully acelimatizated in, 
lakes of southern Japan. Spawning begins early 
in January, ending in February. 
Osmerus dentex Steindachner 
** Kyuri-uwo "' 
PL. XIII, fig. 6. XT 
D. 10; A. 15; scales 70. 
Length of body equal to about 4 times that of 
head, and to about 6 times depth of body. Body 
elongated, slender and compressed ; head long and 
pointed at the tip; mouth large, lower jaw slightly 
longer than upper; maxillary extending to pos- 
terior margin of orbit. Jaws are provided with 
small teeth; tongue with a few strong teeth at 
the tip. Dorsal fin inserted near middle of body. 
Body attains to 200 mm. in length. Colour of 
body pale-brown above and white below. This 
species ranges from the coasts of Alaska to 
northern Hokkaido. Spawning takes place in 
May. 
Salangichthys microdon Bleeker 
** Sira-uwo 7 
PL, XIII, fig. 7. x1 
D. 11; A, 23. 
Length of body equal to 6 times that of head, 
and to 8'/, times depth at the insertion of anal 
fin. Body very elongated, translucent, cylindrical 
anteriorly, and compressed posteriorly, especially 
so in the male; females more slender than males. 
Head rather short, narrow and depressed above, 
and pointed at tip. Lower jaw somewhat longer 
than upper, and maxillary extends to anterior 
margin of orbit. Teeth arranged in a single row 
in jaws and on palatines, those on premaxillary 
being enlarged. Body entirely scaleless in the 
female; but in the male there is a single row of 
large thin seales which extend along the base of 
anal fin. First dorsal fin inserted on posterior 
third of body, before anal fin; caudal fin deeply 
forked. Colour of body translucent, two rows of 
black spots along ventral surface, It attains to 
100 mm. in length. This species is found off the 
coast of every part of Japan. It ascends rivers 
during period from March to May to spawn. A 
valuable food fish in Japan, 
Oncorhynchus masou (Brevoort) 
** Amenouwo ” 
PL. XIII; fig. 1. xu. 
D. 12; A. 14; scales 133. 
Length of body equal to 3 */; times depth of body, 
and to4times length of head. Body oblong and 
compressed. Jaws long and upper jaw overlaps 
lower; maxillary extends scarcely beyond eye. 
Caudal fin slightly emarginated. Gill rakers short 
and 17 to 20 in number. Body bluish-green above, 
covered with numerous small black spots, which 
also occur on dorsal, adipose, caudal fins; pectoral, 
ventral and anal fins have rather faint black spots 
on them. Length of body attains to 650 mm. 
This fish is the landlocked form of Oncorhyn- 
chus masou (Brevoort), and is abundantly 
found in Lake Biwa, where the adult is specially 
called ‘‘Amenouwo’’; it averages 400 mm. in 
length and 1 kg. in weight. Recently, this fish 
h s been suecessfully transplanted to other moun- 
tain lakes in Japan. 
Hucho perryi (Brevoort) 
we Ito 33 
PL. XIII, fig. 2. * 
D. 10; A. 9; scales 109, 
Length of body equal to 3 ½ times that of head, 
and to 5 times depth of body; length of head 
about 4 times that of snout, and 5 times diameter 
of eye. Body elongated and slender, covered with 
somewhat small scales; head long and pointed at 
tip; maxillary extending a little beyond eye; vomer 
boatshaped, its shaft strongly depressed, and with- 
out teeth ; tongue has a row of sharp teeth on 
each edge. Caudal fin deeply forked. Colour of 
body dark above and silvery below, head and 
body profusely covered with small brown spots, 
It attains to 600 mm. in length. This species is 
distributed in streams of northern Japan, especial- 
ly in Hokkaido. It ascends rivers in April, and 
spawning take place from September to October, 
Plecoglossus altivelis Temminck & Schlegel 
rá Ayu LÉI 
PL. XII, figs. 3. (male), fig. 4. (femal) x1 
D. 10 to 11; A, 14 to 16; scales 156, 
Length of body equal to 4% times that of head, 
and to 4% times depth of body. Body moderately 
elongated and covered with very small scales. 
Head somewhat small and snout pointed. Maxil- 
lary extending somewhat beyond eye. Young has 
canines in jaws disappearing with age, but adult 
has very broad, short teeth seated in folds of skin. 
Male differs from female, in having dorsal and 
pectoral fin rays longer, and anal fin rays shorter 
than hers. Colour of body light brownish-yellow 
above and silvery below, and with a yellow bar 
on the area posterior to the gill opening. Body 
attains to 300 mm. in length. This species is 
distributed from Hokkaido to Formosa and also 
to Korea. It spawns from September to Novem- 
ber in the middle course of the rivers, and the 
fry descends the rivers to the sea, where it spends 
the Winter. In March the young fish ascend the 
rivers to the upper parts where they feed on their 
natural food, and grow somewhat rapidly. It is 
the choicest in flavour of fresh water fish in 
this country and is highly prized by the Japanese 
as a delicacy. 
g 5  * 
Hypornesus olidus (Pallas) 
《第 十 三 图 版 ”第 五 图 ) x1 
D. 8 to 9: A. 16; seales 57. 
MELMEO 4/4% HHO 5 / Db. ۴ 
D 8*/4&. MURO 3 ½ Heeb. Hite, FIREONE 
ZI ce. DARIO ا | 7 .ع عا‎ PARE 
ER). Wibi WARNTE REARS 
BEES ٠١ sutz Er rot 
En & 2. MAP + ۰سا‎ 1*2 12 AE 
53. 2۵۲۱۱-۱28۳6 5 LEM MEPS . EFE 110 ۴6۱-۴ 
T ERS غ‎ BERE ERO 61111 BML, DR 
XH MN. EME, HL, MICHEL X 
AWPU CHIT. IO 5000 FE p. 
4 27 ا‎ 27 + 
Osmerus dentex Steindachner 
ENEE TG CHEN 
D. 10; A. 15; scales 70. 
MEAD 4 با‎ EGO ۵ D. THEMED 3 
Im, RED 5 182 ۰ RS MT FEK 4 He 
HRALO- AEREL FREIE DARL. LAT 
IRR OBERT CET. LRRD. REB 
اناالا‎ HS KED IDRC 2 PE MODA SH, 
DZ, ERR EEE haaa Y. Wee wo 
RED K 200 FEET. MCS AF ABIL DPBS حا‎ 
THA هآ‎ AIR خر ار‎ ۳ 2 A DIET 
HAO PM ۲ ۱226 o CHEN 3- : 
* e E. > 
Salangiethys mierodon Bleeker 
(第 十 三 图 版 ”第 七 图 ) x1 
D. 11; A. 23, 
181۱2211 RT 041, AS AAA 
MELIMWERO 3/0 4% RED 4 / EE T. REEL 
ERL BM LC, ein, PALA Y 
H IS CEL € AUT. WEKE X o AEL Wi 
AAA ELT NM eh. CTI EH DF 
EI, K sei, HEA 4 dE 2 b 
ASTRO / BANS D. EERE (IKE 
. M'ERU ۳۵۵ ۱ مات‎ Wi 
WO 2 NEH. N K 100 FE id F . DAS 
ONE E b FIRE MU = 5x06 4 
ما‎ WHEDANCLEIHCTEIENT. N 
ONE D. LEONE 2000 Hr ser, 
7 SAS, 
Oncorhynchus masou (Brevoort) 
(第 十 三 图 版 ”第 一 图 ) و‎ 
D. 12; A. 14; scales 133. 
0818 > > خا اع‎ HHH 4 3309۶ ماع‎ EN 
ERNI L HD. FAILS PARE A 
T. HEA PTE LCN ما‎ t 
Watt eg, IS, eh. REE 650 FEN 
T. EPA Y سم‎ JH OU ذا‎ BARS FIC LTR 
AT. MKIRETSFALLTSCHEN O B 
ETH Y O ADE TARA RH. 
1 上 7 
Hucho perryi (Brevoort) 
《第 十 三 图 版 ”第 二 图 ) ۶ 
D, 10; A. 9; scales 109, 
MEAHEO 3 ½ t, RHO 5 ff. 0 
4 f, IREO 5 Ig b. BEK (ETF, 827/۱۶ ۰ 5 
HE/ FEMA. ۱3 ۵ 1۳ E Hb. B 
] 25-۳ ۱ BEAL, ۲۳۷۷۵۳۵ ¢ MA THE L. FED 
TIC که‎ 1 ORAS ١ . EREB SURE Zn. 
METER, MARISSA de h. MAE NUN 
(id It b. REK 600 FEET. ۳۵ H 
AULUS rd. UNE o de H ع‎ 
Min L, IJ X b EMEH DY TEIT. 
KA E 
Plecoglossus altivelis Temminck & Schlegel 
(tan "E, FORO) x1 
D. 10 to 11; A; 14 to 16; scales 155. 
MEME o 4%/4t fads 4 ½ HN Y. MEI e 
DÊ ê O 2 % AE, WED 54%, MRO 2۳/۱ E 
EME A. RIFET OO. HERB ETHIE BER 
ENU. WETDnUMDEEXO, Pott 
Ed DK ۲۱۱ بل‎ END HND E ant 
DORADA MERA METRES E 
سا‎ ۳۸۲۲۱۹2 b. ۸۵26170۱-۵ 1 Pie b. HE 
LBE: St LASA E (HEMED RR HEIL BOL جا‎ E 
ما‎ ERKA جاه‎ 300 HET. JO I Y EE 
RIS L, MHF BEEF. +A’ 0-۱-5 DHI 
PHOBIEN CEIT. 38۱۵ ۱۵۸۱-۴۸76 L, ۲ 
i- F SNE EBT. = Alan ETE LF. ( Hte 
IND ED, KAMER LEGRILISUCCHOÁ hip. A 
CK MB b HEHE SOIL CHE, 9:0 HHN b. 
