Biology of the Antarctic Seas VI

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Published via the yankee Geophysical Union as a part of the Antarctic study Series.

Species within the genera Hyarachna, Echinozone, Pseudarachna, and Aspidarachna, all within the relations Hyarachnidae, are reviewed and seriously mentioned. A key to genera is gifted in addition to a desk of the species in every one genus from antarctic waters. The genus Echinozone is redefined on new specimens from Anvers Island. A precis of every species in Echinozone is incorporated, and the genus is redefined. Pseudarachna is in brief mentioned, and a moment species is further to the genus. within the family members Janiridae, Notasellus and Austrofilius are introduced out of synonymy at the foundation of specimens from Anvers Island, and the species of Iathrippa and Neojaera are mentioned with a serious evaluation of every species. The genera Nostasellus and Austrofilius are redefined. Ectias is redefined on specimens of the sort species from Anvers Island, and a species from South Africa is extra to the genus. Maps of the distribution of the various species are integrated.

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0. englishi n. sp. Epicalymma schmitti n. , n. sp. 2£. umbonata n. sp. Conaea rapax Giesbrecht C. sue cur va n. sp. C. hispida n. sp. 1817 M 106 14 F 1824 M 343 3 1919 F M 38 9 1 10 60 15 15 31 11 11 2 3 32 2 66 80 12 103 12 1 12 9 3 36 15 17 1920 F M 54 45 6 2 3 1 8 F M 8 1 1 1 20 37 18 2 3 5 3 1 1 49 20 107 1 9 1 2 4 4 42 50 8 5 2 These projections are incompletely sclerotized at the terminal or subterminal region of a number of species. There is a possibility that the setae of leg 5 of all species considered here are delicately plumose, but they have been figured as such only when this aspect was distinct.

Hispida + + + + + + + + I II III IV V VI 8 8 8 13 10 8 8 11 8 11 12 16 13 12 7 8 12 8 10 10 10 7 7 7 12 8 22 23 24 20 20 24 25 22 21 20 23 21 21 22 18 17 20 17 18 21 18 16 18 18 14 17 46 44 44 47 47 42 40 38 47 46 38 37 40 38 43 54 44 53 52 43 48 48 47 54 47 44 11 10 10 10 11 11 12 12 11 10 12 12 11 12 12 10 12 10 9 13 11 12 10 8 12 12 5 5 5 3 4 5 6 6 5 4 6 5 6 6 4 4 5 4 4 5 5 5 5 6 6 6 9 9 8 7 8 8 8 11 8 9 8 9 8 10 16 7 7 7 7 8 7 12 13 8 9 13 Relative Characteristics of the Oncaeidae Species Used in This Study Mandible Denticles + + + + + + + + + + + + + + Leg 5 Maxilliped F, Second Segment Setules + + + + + + + + + + + + + + + + + + + 41 SpSp + + + + + + + + + + + + + + + + + seSp Leg 4, Third Endopod sese Leg 1, M, Modified ISp 3Sp + + + + + + + + + + + + + + + + + + + + + + + + + + 2Sp + Here Sp indicates spine, se seta, F female, and M male.

62 Leg 4 with third endopod segment bearing two spines 16 Leg 4 with third endopod segment bearing three spines 17 Leg 4 with neither terminal spine as long as third endopod segment O. rotunda, p. 77 Leg 4 with long terminal spine longer than third endopod segment O. englishi, p. 79 Genital segment as long as or longer than remainder of urosome 18 Genital segment shorter than remainder of urosome. 20 Leg 5 not delimited from thoracic segment O. petila, p. 75 Leg 5 a free segment 19 Leg 5 with two terminal setae approximately equal in length O.

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