Collecting site
Incheon (Zinsen, Jinsen, Chemulpo), Korea
latitude: 37.466702     37°28'0.13"N
longitude: 126.633301     126°37'59.88"E
[Precision of location: Alexandria Digital Library (with NGA GNDB data)] 
[Site Named Here by name of site (or city, etc.)] 
Collected here:
| Pseudostylochus okudai Kato, 1937 | Jul 1936 |  |  | collected by Mr. Siro Okuda of the Hokkaido Imperial University, in the coasts of Korea.  Two specimens at Zinsen on the western coast of Korea. | 
| Prosthiostomum asiaticum Kato, 1937 | Jul 1936 |  |  | collected by Mr. Siro Okuda of the Hokkaido Imperial University, in the coasts of Korea.  Single specimen from Zinsen on the western coast of Korea. |