Two new species of Porifera,
Dendroxea pseudodidiscoides
(Tremiti Archipelago, Adriatic Sea) and
D. adumbrata (Ustica
Island, Tyrrhenian Sea), are described. They show a close affinity
with the Atlanto-Mediterranean species
D. lenis (TOPSENT,
1 892), even though they are both characterized by the occurrence
of a peculiar spicular type.