Though Glossogobius biocellatus (CUVIER et VALENCIENNES) has been recorded in the Ryukyu Islands, there is a record by NAKAMURA (1941) of its having been caught in Japanese waters north of the Ryukyus. However, on November 8, 1962, two specimens of this species were obtained from the mouth of the River Oyodo in southern Kyushu. Their gill membranes are united across the isthmus, and the upper part of the iris makes a small projection into the pupil, as described by TOMIYAMA (1936). The counts and measurements of the two specimens from Kyushu are given in Table 1, together with those of the specimens from the Philippines, and those of the descriptions of HERRE (1927), KOUMANS (1941) and AOYAGI (1957). On the whole, the counts, the measurements and other characteristics of the Japanese specimens as well as those of the Philippine specimens agree well with those given by these authorities. The Philippine specimens are darker in colour than the Japanese specimens, and it is difficult to see the pattern on the ventral fin. One of the two Japanese specimens, in both of which the ventral pattern can be clearly seen, is illustrated in Figure 2. It seems likely that the darker coloration of the Philippine specimens is due to their having been caught during the breeding season.
A record of Sagamichthys abei PARR of the family Searsidae is given. This species has been already recorded by TANAKA (1910) from Sagami Bay. The specimen was caught by bottom trawl on February 13, 1963, from a depth of 250m. off the coast of Miyako, Iwate Pref. Its standard length is 252mm.
The reciprocal crosses between Pseudogobio esocinus and Biwia zezera are successful and three hybrids from P._??_B._??_are reared until they reach one-year age with a survival rate similar to that of controls. The hybrids are not only intermediate morphologically, but also they behave intermediatelly between their parental forms. Of three hybrids reared until one-year age, two are sterile males and remaining one is a neuter. None of spermatozoa is observed in their testes.
Preliminary results obtained from a series of experiments conducted during the striped mullet (Mugil cephalus LINNAEUS) fishing season of 1963 indicated that the ripe striped mullets during their spawning migration to the southwestern coast of Taiwan could be induced to spawn by injection of hormonal materials. The threshold dosage for precipitating ovulation of the female mullets was approximately at the level of 2.0 pituitaries taken from fish of the same species and of comparable size combined with 40 rabbit units of Synahorin (a gonadotropic product composed of a mixture of chorionic gonadotropin and hypophysial extract). The great majority of the males, however, did not require administration of hormones, to furnish sperms for the ovulated eggs. The embryonic development of this species observed from the external features is described and shown in photomicrographs of living specimens in this paper. The hatching of these eggs took place in 59 to 64 hours at water temperatures ranging from 20.0° to 24.0°C. Most of the newly hatched larvae died two days after hatching, and none of them survived beyond the prelarval stage when reared either in aquaria or holding boxes in shallow sea.