78 
Glycymeris amamiensis Kuroda; Chlamys mol- 
lita ( Rve. ) ; C. vesiculosus ( Dkr. ) , var.; C. 
tissotii (Bernardi); Lima tomlini Prashad; Cte- 
noides japonicus (Dkr.); Plicatula muricata 
Sowerby; Septifer gray anus (Dkr.); Gians kyu- 
shuensis, n. sp.; Chama argentata Kuroda and 
Habe; Frigidocardium eos (Kuroda); Vasti- 
cardium sp.; Venus toreuma (Gould); Pitar 
sp.; Bursa sp.; Galeoastraea millegranosa Habe; 
G. tayloriana (Smith); C er at o stoma vespertilis 
Kira; Chicoreus laciniatus (Sowerby)?; Polyn- 
ices sp.; Conus sp. 
FIG. 4. Distribution of Perotrochus heyrichii (Hil- 
gendorf). (See section 12 for numerals on dots.) 
PACIFIC SCIENCE, Vol. XVII, January 1963 
10. Uji Islets 
At 3 stations from depths of 126-140 m; 
dredged by the R.V. "Soyo-maru” on Feb. 8, 
1959. 
A car congenitum (Smith), 126 m; Striarca 
fausta Habe, 126 m; Samacar pacifica (Nomura 
and Zimbo), 126 m; Mimarcaria aizoi Sakurai 
(MS), 126 m; Hawaiarca uwaensis (Yoko- 
yama), 126 m; Spondylus anacanthus (Mawe), 
126 m; Chlamys lemniscata (Rve.), 140 m; 
Malleus irregularis ( Jousseaume) , 126 m; 
Chama argentata Kuroda and Habe, 126 m; 
Atrina penna Habe, 140 m; Penicillus giganteus 
(Sowerby), 126 m; Perotrochus salmiana I 
(Rolle), 126 m; Serpulorhis medusae Pilsbry, 
126 m; Emarginula sp.; Malluvium otohimeae 
(Habe), 140 m; Bursa ranelloides (Rve.), var., 
126, 140 m; Semicassis sp., 140 m. 
11. Insular Shelf around Goto Islands 
Sakurai (1959, and personal communication) 
reported the following species which have been 
collected by Cor allium fishing nets operated off 
the Goto Islands; depths of operation may be 
about 100-200 m. 
Mimarcaria aizoi Sakurai ( ms ) ; Barbatia 
tamikoae Sakurai (MS); A car congenitum 
(Smith); Striarca fausta Habe; S. soyoae Habe; 
Chlamys lemniscata ( Rve. ) ; Dymia argentata 
Habe; Samacar pacifica (Nomura and Zimbo); 
Chama argentata Kuroda and Habe; Perotro- 
chus hirasei Pilsbry. 
TYPICAL SPECIES OR SPECIES-GROUPS FOR 
BANKS-ASSOCIATED MOLLUSCA 
Because the present data are not based on 
quantitative samplings, it is not possible to dis- 
cuss the matter from a quantitative point of 
view. However, several species-groups may be 
indicated as endemic ones (or semiendemic) for 
submarine banks or insular shelves, because of 
their frequency or abundance in occurrence. 
12. Perotrochus beyrichii (Hilgendorf) 
Fig. 5 
It is well known that this "living fossil” occurs 
on the lower shelf around Sagami Bay. The 
