It was concluded that the salmonid fish found in Ise Bay, the Inland Sea, Tokai district, Kinki district, and Shikoku district (Figs.1-2, Table 1) is the sea-run form of“Amago”, Oncorhynchus rhodurus Jordan and McGregor which is widely distributed in the freshwater of southwestern Japan.It was shown that the sea-run form is morphologically different from the salmonid fish“Biwamasu”in Biwa Lake which has been considered to be conspecific with O.rhodurus.
In Onaga-tani (Fig.1.B) and Sutani River (Fig.1.C) in the upper reaches of Ane River and Echi River of Lake Biwa water system, the author collected specimens which seem to be the char, Salvelinus leucomaenis having zigzag marks, instead of parr-marks, on their body side.Since such specimens are not known, the author describes their form (Table 1), localities, and habitats. Specimens with atypical color patterns may be variation of Salvelinus leucomaenis (Pallas), and not hybrids between other salmonids and the char.Japanese name “6 nagaremon -iwana” is proposed for these variants.
The following three species of the genus Glossogobius have been recorded from Japan: G.olivaceus (Temminck and Schlegel), G.biocellatus (Valenciennes) and G.giuris (Hamilton). Three specimens of the fourth species which well agree with the syntypes of Gobius celebius Valenciennes (Fig.4) have been collected in Iriomotejima (Fig.1).They were compared with nine specimens of G.celebius from Australia and the Philippines and twenty two specimens of G.giuris.It was found that G.celebius can be distinguished from G.giuris by the number of predorsal scales (13-15 in G.celebius and 17-22 in G.giuris);the number of spines on the gill-raker (4 and 12 on the fifth from the uppermost gill-raker on the lower limb in two specimens of G.celebius;0 and 1 in six specimens of G.giuris);eye diameter (6.6-9.2%, mean 8.0%, of standard length in twelve speci mens of G.celebius;3.8-6.4%, mean 5.0%, in twelve specimens of G.giuris);the two small additional pores between G and H on the oculo scapular sensory canal (Fig.3A);and the uniserial pit organ lines without a group of short pit organ lines on the lower part of the opercle (Fig.3A).
Five specimens of Cryptocentroides insignis (Seale) collected from Ishigakijima, Okinawa Prefecture are described here with a new Japanese name, “hasujimahaze”.The specimens examined well agree with the, description and the figure by Seale (1910: 116, pl.2, fig.1) and the description by Herre (1927: 234).
Three specimens of Ectreposebastes imus Garman were collected from off Kamaishi (dept 710-895 m) Iwate Prefecture, Japan.These specimens have some characters which fall outside of ranges of variations reported by Eschmeyer and Collette (1966).Previously this species was reported only wice from Japan: one specimen from off Kesennuma, Miyagi Prefecture and one from Suruga Bay, off Heta, Shizuoka Prefecture.