. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. ii2 DISCOVERY REPORTS tooth (Text-fig. 54A). The hydroecium is less deep than that in both L. fowleri and L. hardy. The somatocyst, which alters shape, presumably in accordance with the amount of fat in store, may be spheroidal or egg-shaped, often much flattened, but its base remains close to the basal facet of the nectophore, and it usually reaches to the ventral facet. The canal leading immediately to the somato- cyst is well on the baso-dorsal side. In dorsal view it will be noticed that the
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. ii2 DISCOVERY REPORTS tooth (Text-fig. 54A). The hydroecium is less deep than that in both L. fowleri and L. hardy. The somatocyst, which alters shape, presumably in accordance with the amount of fat in store, may be spheroidal or egg-shaped, often much flattened, but its base remains close to the basal facet of the nectophore, and it usually reaches to the ventral facet. The canal leading immediately to the somato- cyst is well on the baso-dorsal side. In dorsal view it will be noticed that the mouth-plate on the left (morphologically the right-hand one) is much broader than the other (Text-fig. 54 B). Both halves of the mouth-plate are much less deep than in L. hardy and L. fowleri. It may be found advisable later on to include the three species fozvleri, hardy and challengeri in a separate genus. The eudoxids of all are known but have not all been described and figured. The holotype specimen (Text-fig. 54A, B) bears the (Nat. Hist.) Register number: 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,
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