. iQmm C ped Text-fig. 51. Sulculeolaria biloba. Posterior nectophore from Celtic Sea, Plymouth 1937 Cruise, St. 6. A, C, dorsal and lateral view of the mouth-plate, x 2-5 ; B, ventrolateral view of proximal end to show triangular, articulating facets, x 3-5 ; D, posterior nectophore, x 3-5. Bigelow's 'baso-ventral' sector indicated between k and / in fig. B. [Galetta] Sulculeolaria turgida (Gegenbaur), 1854. Gegenbaur (1854) described and figured (under the name Diphyes turgida) a species of 'Galetta with no obvious somatocyst in the anterior and an undivided, rounded lamellato the pos
. iQmm C ped Text-fig. 51. Sulculeolaria biloba. Posterior nectophore from Celtic Sea, Plymouth 1937 Cruise, St. 6. A, C, dorsal and lateral view of the mouth-plate, x 2-5 ; B, ventrolateral view of proximal end to show triangular, articulating facets, x 3-5 ; D, posterior nectophore, x 3-5. Bigelow's 'baso-ventral' sector indicated between k and / in fig. B. [Galetta] Sulculeolaria turgida (Gegenbaur), 1854. Gegenbaur (1854) described and figured (under the name Diphyes turgida) a species of 'Galetta with no obvious somatocyst in the anterior and an undivided, rounded lamellato the posterior necto- phore from the Straits of Messina. Candeias (1929) found the anterior nectophore of a similar species, and in 1932 I reported on similar specimens from the Great Barrier Reef. Since then I have often seen these forms. In recent years Dr T. Gamulin has been sending me fine specimens of both nectophores of this species from the Adriatic. Since a species of this sort was long ago described from the Mediterranean and can still be recog- nized there, I think it well to retain the name turgida for it. The two points about the alleged absence of a somatocyst and the undivided lamella of the anterior nectophore can both be explained, I still think, by the difficulties encountered in trying to see the details of these transparent animals. Dr Sears herself says ' both characters which make the species. . unique. .are such that they could have been overlooked easily'. The most characteristic thing about the Mediterranean species is the rounded and undivided lamella of the posterior nectophore (Text-fig. 52), which Gegenbaur clearly figured. The larva was figured by Gegenbaur (1853, pi. 16, fig. 20) and labelled in error, Diphyes sieboldii. On 15 April 1950 Dr Mary Sears published a paper on siphonophores from the Marshall Islands. In it appears a review of this subject and a description of the deformed anterior nectophore of a similar species under the new name Galetta bigel
Size: 2912px × 1716px
Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti
