A collection of Sipuncula taken on the summit of the Vema sea-mount, South Atlantic Ocean

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Abstract
A collection made on the summit of this sea-mount, at depths of between 42 m. and 61 m., contained 18 specimens of Sipuncula, referable to 4 spp. This sea-mount is situated off the west coast of Cape Province in 31[degree] S., 8[degree]20 E., and lies beyond the range of the cold Benguela current. It rises from a depth of about 4,570 m. (2,500 fm.), with a base of some 25 mi. in circumference and terminates in a plateau lying about 73 m. (40 fm.) below the surface. The surface of the plateau is rugged and uneven, with numerous gullies and several peaks, the highest rising to within 25 mi. (14 fm.) of the surface. It has a dense and varied covering of sponges, hydroids, ascidians and seaweeds, with a number of sedentary invertebrates living among this mat. Sipunculus titubans dyptichius is redescribed and S. norvegicus spp. vemae described, with notes on 2 spp. of Phascdlosoma.

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