circumscript

Century Dictionary and Cyclopedia

1. Circumscribed; limited.
2. In the Echinoidea as applied to the ambulacra, not continuous from one pole of the body to the other, but confined to the area above the equatorial circumference or ambitus, enlarging at first and subsequently contracting within this space and thus assuming a petaloid outline.

Wiktionary

1. adj. limited, circumscribed