The serpulid polychaete Spirobranchus tetraceros of Red Sea / Indo-pacific origin, recently has succeeded to establish a foothold in Alexandria Mediterranean waters. Worms were monthly scraped from submerged iron substrates at Abu Kir Bay during the period

A new species of Dialychone, D. egyptica sp.n. (Sabellidae) is described from the Mediterranean Coast of Egypt. The material was collected from soft bottom at 60 m depth. It is unique among the genus in having an abdominal glandular ridge on chaetiger 13. The new species is also characterized by having pygidial cirrus, medium sized radiolar tips and long radiolar pinnules, anterior peristomial ring lobe incised and exposed beyond collar, a trapezoidal ventral collar shield, and paleate chaetae with long mucro. The distributions of Dialychone collaris (Langerhans, 1880), D. usticensis (Giangrande et al., 2006), D. dunerificta (Tovar-Hernández et al., 2007), and Paradialychone gambiae (Tovar-Hernández et al., 2007) along the Mediterranean coast of Egypt are also presented. P. gambiae reported for the first time in the Egyptian coasts, while D. dunerificta was previously recorded as Chone duneri Malmgren,

ABSTRACTn the present study, 9 spionid species were reported. Five of them are new records to the Egyptian waters. In order to achieve this study fouling components and sediments samples were collected from different sites of Egyptian waters. The recorded spionid species were described and figured in details. The identification of the two Dipolydora species has been corrected. The relation between the surrounding habitat, major spines of setiger 5 and boring activity of the recorded polydorid species was discussed. The geographic distribution of five new taxa recorded indicated that Scolelepis carunculata, Pnonospio aucklandica and Pseudopolydora paucibranchiala appeared for the first time in the Mediterranean Sea. They are of indo-pacific origin and migrated through Suez Canal. While Pnonospio steenslrupi is new to the Egyptian Mediterranean waters and Spiophanes kroeyeri new to the Egyptian Red Sea waters (Suez Bay).

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