Bougainvillia sp.

(fig. 2A–B)

Material examined. Stn. 3: 01.04.2008 —two 4 mm high monosiphonic, sterile stems, on concretions.

Description. Colonies small, ca. 4 mm high, with erect, monosiphonic, irregularly branched cauli. Perisarc covered with detritus, slightly corrugated at bases of branches, elsewhere smooth; pseudohydrotheca present, evenly covered with detritus. Branches short, each with a terminal hydranth; the latter with roundedconical hypostome encircled by single whorl of 11–13 filiform tentacles. Gonophores absent. Nematocysts (undischarged): microbasic euryteles (5.8–6.1) × (2.4–2.7) µm; desmonemes (3.8–4.1) × (2.4–2.7) µm.

Remarks. The present material belongs, without any doubt, to Bougainvillia Lesson, 1830 . However, the lack of gonophores makes it unidentifiable to species level. Several members of the genus have been reported from the Caribbean (see Vervoort 1968). Additionally, Calder (1988b) recorded B. muscus (Allman, 1863) from Bermuda.