Gyri
See Gyrus.
Sulci
Sulci or Sulki (in Greek Σολκοί, Steph. B., Ptol.; Σοῦλχοι, Strabo; Σύλκοι, Paus.), was one of the most considerable cities of ancient Sardinia, situated in the southwest corner of the island, on a small island, now called Isola di Sant'Antioco, which is, however, joined to the mainland by a narrow isthmus or neck of sand.