Two new Hyalonema species (Hyalonematidae: Amphidiscosida) from eastern and south-eastern Brazil, and further Hexactinellida (Porifera) collected from seamounts off south-eastern Brazil by the RV 'Marion Dufresne' MD55 expedition. Journal of the Marine Biological Association of the United Kingdom, 89(6), September 2009: 1243-1250. 1244 [Zoological Record Volume 146]