. Bulletin - United States National Museum. Science. 194 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 'a O • o LINUCHE UNGUICULATA, var. AQUILA Mayer. Linerges aquila Haeckel, 1880, Syst. der Medusen, p. 496. Linuche aquila Mayek, 1910, Medusae of the World, vol. 3, p. 560, figs. 356 B and C. Linuche unguiculata Vanhoffen, 1913, Zoologischen Jahrbiichern, Suppl. 11, Heft 3, p. 429. Linuche ungiculata forma aquila Mayer, 1915, Publication No. 212, Carnegie Institution of Washington, p. 174, fig. 1, B and O. This variety is widely distributed over the tropical Pacific and is closely related to t
. Bulletin - United States National Museum. Science. 194 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 'a O • o LINUCHE UNGUICULATA, var. AQUILA Mayer. Linerges aquila Haeckel, 1880, Syst. der Medusen, p. 496. Linuche aquila Mayek, 1910, Medusae of the World, vol. 3, p. 560, figs. 356 B and C. Linuche unguiculata Vanhoffen, 1913, Zoologischen Jahrbiichern, Suppl. 11, Heft 3, p. 429. Linuche ungiculata forma aquila Mayer, 1915, Publication No. 212, Carnegie Institution of Washington, p. 174, fig. 1, B and O. This variety is widely distributed over the tropical Pacific and is closely related to the tropical Atlantic L. unguiculata, with which it is identical in form and dimensions, being about 13 mm. high and 16 mm. wide. It has 48 wartlike protuberances upon the subumbrella arranged in two rows instead of in three, as is commonly the case in the Atlantic medusa. Eight On • of the subumbrella sacs in the variety aquila alternate with the gonads and eight arise from the sides of the gonads themselves. Thus, in the Pa- cific medusa we have two zones of protuberances — an inner zone of 16 large sacs and an outer of 32 small subumbrella saccules. The 16 large sacs lie in the midregions of the go- nads, while the 32 small sac- cules lie at the zone of the outer ends of the gonads. In the Atlantic form the areas of brown cells are commonly de- veloped only centrifugal to the zone of gonad, while in the Pacific variety they occur between the gonads as well as beyond them. A marginal ring canal is present. The Pacific variety is, however, found also in the Atlantic. Vast swarms of these Medusae are found among the Samoan, Fiji, and Paumotos Islands, and they extend to the coasts of Africa and to Queensland, Australia. They abound in Queensland in the spring months, in Fiji in December, and at Singapore in April. I have studied a large collection of these medusae taken in the Philippine Islands at Mactan, near Cebu, on April 6, 1908, Cat. No. 27944, , by the Unite
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