1977 年 27 巻 Specialnumber 号 p. 139-144
The author once made a report on the segmental structure of abdomen in Arachnura sp. _??_.Much attention has since then been paid to the abdominal structures of various spiders. The observation has revealed the following facts.
1. The spiders which still retain comparatively distinct traces of segmental structures after becoming adults are Oxytate and Misumenops.
2. Even in other spiders, the same structures can be seen in the early stage of post embryonic development.
The following is the report on these findings.