. --Whydl. To. Text-fig. 78. A, B, posterior nectophores of Abyla ingeborgae Sears, x 3-8, from ' Discovery II' Sts. 706 and 2639 (1200-600 m.) respectively, each associated with anterior nectophores of that type; C, basal view of posterior nectophore of holotype specimen of Abyla schmidti Sears from 'Discovery II' St. 1581, x 4. The solution of this question of a distinction between A. haeckeli and A. ingeborgae may lie in the fact that a species, whose distribution covers such a wide area as that including the N. Atlantic and Indo-Malaysian oceans, may appear as a larger form in the N.


. --Whydl. To. Text-fig. 78. A, B, posterior nectophores of Abyla ingeborgae Sears, x 3-8, from ' Discovery II' Sts. 706 and 2639 (1200-600 m.) respectively, each associated with anterior nectophores of that type; C, basal view of posterior nectophore of holotype specimen of Abyla schmidti Sears from 'Discovery II' St. 1581, x 4. The solution of this question of a distinction between A. haeckeli and A. ingeborgae may lie in the fact that a species, whose distribution covers such a wide area as that including the N. Atlantic and Indo-Malaysian oceans, may appear as a larger form in the N. Atlantic, and that problems in allometric growth may be involved. Sulculeolaria biloba appears to be another such species. Ceratocymba dentata (Bigelow), 1918. (Plates X, XI.) This Abylid has been taken in the Indian Ocean only at 'Discovery II' Stations 1585 and 2696, though ' Discovery II' took it many times in the Atlantic. It has been recorded only by Bigelow (1918), who made the original record of the species from two North-west Atlantic Stations, about 320 N. lat. and 70-720 W. long., and by Moser (1925) west of the Cape Verde Islands under the synonym Abyla quadrat a.


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Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti