Vomer with two irregular series of teeth. Body 
bluish-zreen above, silvery below, back of body 
profusely spotted; sides of body, head, and also 
ventral fins spotted. At spawning season there ap- 
pears a broad reddish band along sides, which ex- 
tends from the end of opercle to base of caudal 
fin; jaws, cheeks and opercles are reddish. It 
attains to a length of about 800 mm. and a weight 
of 2.5kg.. This species was introduced to Japan 
from a stream in California, U.S.A., in 1877, and 
is now widely cultured in ponds and streams. 
Spawning season is a period ranging from Feburary 
to May, 
Salvelinus pulvius Hilgendorf 
° Twana "' 
PL. XIV, fig. 5. x N, 
D. 9; A. 8; scales 185. 
Length of body equal to 3 9/1 times that of head, 
and to 4*/, times depth of body. Body rather 
elongated, moderately compressed; head rather 
short and blunt. Mouth large; teeth of jaws very 
small. Body has numerous light spots above as 
large as pupil of eye; anterior edges of ventral 
and anal fins bright yellow, and upper surface of 
ventral and pectoral fins somewhat dusky in colour. 
Fish attains to a length of 300 mm. This species 
is abundant in mountain streams in Japan. 
Salvelinus fontinalis (Mitchill) 
“ Kawamasu '' 
PL. XIV, fig. 6. x !/s 
D. 10; A, 9; scales 230. 
Length of body equal to 4!/. times that of 
head, and to 4½ times depth of body. Body 
rather stout, oblong and compressed. Mouth large, 
mazallary extending beyond eye. Body dark olive- 
green above and reddish-yellow below; sides of 
body paler than back and seattered with small 
red spots; back and dorsal, adipose, and caudal 
fins vermieulated with dark-olive or black ; pecto- 
ral, ventral, and anal fins reddish, Length about 
500 mm. This species was introduced into Japan 
from the United Sates in 1900, and now is widely 
distributed. Spawning season is November. 
Oncorhynchus macrostomus (Günther) 
'* Yamame ” 
PL. XIV, fieg. 1, 2. x1 
D. 15; A, 14; seales 120 to 140. 
Length of body equal to 35 to 4 times that 
of head, and to 3?/, times depth of body; length 
of head equal to 3 ½ times that of snout, and to 
5 times diameter of eye. Body with about 9 
parr marks on sides, above and below which 
there are a good many round dark spots; it is 
also profusely sprinkled with small black spots; 
occasionally there are similar spots on head, dorsal 
and adipose fins, and also on upper lobe of caudal 
and along base of dorsal fin; some specimens are 
adorned with small bright-reddish spots on back 
and sides. This species is found in mountain- 
streams all over Japan. The red spotted species 
distributed prineipally in the southern parts of 
Japan, especially in mountain-streams draining to 
Pacific coast. Fig. 2 shows a specimen with red 
spots, while the fish shown in fig. 1 has none. 
Both forms commonly known as ''"Yamame" in 
Japan which is considered by most authors land- 
locked form of the Masu” (Pl. XII, fig. 4). 
Oncorhynchus adonis Jordan & McGregor 
* Hime-masu ۳ 
PL. XIV, fig. 3. xij 
D. 10; A. 16; scales 131 to 134. 
Length of body equal to 4 times that of head, 
and to about 4 times depth of body. Body ellip- 
tical in sbape, and Sender in head and tail. Dor- 
sal fin beginning rather posteriorly. Gill-rakers 
comparatively long and numerous. Body greenish 
above, with many small round black spots; dorsal 
with several spots at base; caudal fin with many 
spots. During Summer, body is silvery all over, 
but at spawning season, the mature fish assumes 
light a erimson-red colour along side of body. At- 
tains to a length of 400 mm. Formerly this speeies 
was found only in Lake Akan, Hokkaido, but 
recently it has been successfuly introduced into 
and acelimatised in almost all mountain lakes in 
Japan. This species is a landlocked form of the 
red salmon. Spawns in October and November. 
Salmo irideus (Gibbons) 
* Nidimasu " 
PL. XIV, fig. 4. x s 
D. 11; A. 12; scales 146. 
Length of body equal to 4 times that of head, 
and to 34/; times depth of body. Body oblong 
and compressed, covered with rather large scales 
compared with other salmon. Head rather short, 
blunt, convex and obtusely ridged above. Mouth 
moderate ` maxillary scarcely reaching beyond eye. 
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Salvelinus pulvius Hilgendorf 
CH HIRD و‎ 
D. 9; A. 8; scales 185. 
EERIE 3٩ Ik, Mig 44/5 ۶۰ ۴ 
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Salvelinus fontinalis (Mitchill) 
CAS THERM SA ۵ و‎ 
D. 10; A. 9; scales 230. 
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Oncorhynchus maerostomus (Günther) 
CAS HU Ml, BZD ۱1 
D. 15; A. 14; scales 120 to 140. 
EMH HECO 4% fü, HHO 3 / 1 . ۷۵ 
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Oncorhynchus adonis Jordan & McGregor 
(第 十 四 图 版 BBD ۶ 
D. 10; A. 16; scales 131 to 134. | 
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Salmo irideus (Gibbons) 
Arme Say) و‎ 
D. 11; A. 12; scales 145. 
MASHED 41%, Mio 3 ½ 4%, ERAIK 5 4% 
BY, 1812 ۳ Ric), URN] S &, otir LC AB کل‎ 
