Enlarged section of perichordal tube that is arranged serially but out of phase with segmental musculature. [ https://www.worldcat.org/search?q=bn%3A0073040584 ]
This is just here as a test because I lose it
Enlarged section of perichordal tube that is arranged serially but out of phase with segmental musculature. [ https://www.worldcat.org/search?q=bn%3A0073040584 ]