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. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. radlat ~i~~C' radv - - Whydr. Whydr Text-fig. 83. Abylopsis tetragona, posterior nectophore, to show how the left ventral hydroecial fold is held rigidly in place by the right. A, latero-ventral view, x 5 ; B, a section just above the locking tooth of the right wing, x 8-8; C, apical view, x 8-8. REFERENCES Agassiz, A., 1863. On Nanomia cara. Proc. Boston Soc. nat. Hist, ix, pp. 180-1. 1865. North American Acalephae. 111. Cat. Mus. comp. Zool. Harv. No. 11, pp. 201-13, text-figs. 331-50. Ankel,
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. radlat ~i~~C' radv - - Whydr. Whydr Text-fig. 83. Abylopsis tetragona, posterior nectophore, to show how the left ventral hydroecial fold is held rigidly in place by the right. A, latero-ventral view, x 5 ; B, a section just above the locking tooth of the right wing, x 8-8; C, apical view, x 8-8. REFERENCES Agassiz, A., 1863. On Nanomia cara. Proc. Boston Soc. nat. Hist, ix, pp. 180-1. 1865. North American Acalephae. 111. Cat. Mus. comp. Zool. Harv. No. 11, pp. 201-13, text-figs. 331-50. Ankel, W. E., 1951. Phyllirrhoe, Mnestra und die Probleme der Gemeinschaften des ozeanischen Pleustals. Verh. dtsch. zool. Ges. 1951, pp. 396-404, 6 text-figs. Bedot, M., 1893. Revision de la Famille des Forskalidae. Rev. Suisse zool. I, pp. 231-54. 1896. Les Siphonophores de la Bale d'Amboine. Rev. Suisse zool. Ill, pp. 367-414, pi. 12. 1904. Siphonophores provenant des campagnes du yacht Princess-Alice (1892-1902). Result. Camp. sci. Monaco, xxvn, pp. 1-27, 4 pis. Berrill, N. J., 1930. On the Occurrence and Habits of the Siphonophore, Stephanomia bijuga (Delle Chiaje). J. Mar. biol. Ass. xvi, pp. 753-5, 1 text-fig. Bigelow, H. B., 1904. Medusae from the Maldive Islands. Bull. Mus. comp. Zool. Harv. xxxix, pp. 245-69, 9 pis. 1911a. Biscayan Plankton Collected during a Cruise of 'Research', 1900, Part xin. The Siphonophora. Trans. Linn. Soc. Lond. (Zool.), x, pp. 337-58, pi. 28. 1911 b. The Siphonophorae. Reports Sci. Res. Expedition to the Eastern Tropical Pacific. . .XXIII. Mem. Harv. Mus. comp. Zool. xxxvm, No. 2, pp. 173-402, 32 pis. 1913. Medusae and Siphonophorae Collectedby the Fisheries Steamer ' Albatross' in the North-Western Pacific, 1906. Proc. nat. Mus. xliv, pp. 1-119, 6 pis. 1918. Some Medusae and Siphonophorae from the Western Atlantic. Bull. Mus. comp. Zool. Harv. lxii, pp. 363-442, 8 pis. 1919. Contributions to the Biology of the Phil
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