. Cpa cped Text-fig. 54. Lensia challengeri, , anterior nectophore from 'Challenger' St. 104, Oct. 1950; A, lateral view, x 12; B, dorsal view of mouth-plate, x 35. Lensia hotspur, anterior nectophore, Gulf of Aqaba, Manihine St. 1; C, antero-lateral view of base, X40; C1, dorsal view of mouth-plate; D, lateral view, x 12; E, lateral view of base, x 25. Lensia cossack Totton, 1941. This species was reported by Browne from Chago, Mauritius, Farquhar and Amirante under the name of Diphyes subtiloides. I have re-examined eight of the eleven anterior and the two posterior nectophores which ar

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. Cpa cped Text-fig. 54. Lensia challengeri, , anterior nectophore from 'Challenger' St. 104, Oct. 1950; A, lateral view, x 12; B, dorsal view of mouth-plate, x 35. Lensia hotspur, anterior nectophore, Gulf of Aqaba, Manihine St. 1; C, antero-lateral view of base, X40; C1, dorsal view of mouth-plate; D, lateral view, x 12; E, lateral view of base, x 25. Lensia cossack Totton, 1941. This species was reported by Browne from Chago, Mauritius, Farquhar and Amirante under the name of Diphyes subtiloides. I have re-examined eight of the eleven anterior and the two posterior nectophores which are now in the British Museum Collection. Lensia subtiloides (Lens & van Riemsdijk), 1908. The record by Browne from Chagos, Mauritius, Farquhar and Amirante is not for this species but for Lensia cossack. I have re-examined the specimens in the British Museum Collection. L. subtiloides and one of its associates, Diphyes chamissonis are not widely spread over the oceans. They were the only two really abundant Siphonophores that the Great Barrier Reef Expedition of 1928-9 found in the Barrier Reef lagoon, where Lensia subtiloides became relatively very rare when the

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