. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. SYSTEMATIC 141 Chlanidota signeyana , PL VIII, figs. 34, 35 The species is closely allied to the South Shetlands elongata but is constantly broader and of ovate rather than cylindrical outline. Shell thin and fragile, white, covered with a thin, pale buff epidermis. Spire tall for the genus, 0-56 height of aperture. Whorls sculptured with moderately strong but narrow sharply raised spiral cords, ten to eleven on penultimate and twenty-three to twenty-six on the body-whorl, plus a few weak i
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. SYSTEMATIC 141 Chlanidota signeyana , PL VIII, figs. 34, 35 The species is closely allied to the South Shetlands elongata but is constantly broader and of ovate rather than cylindrical outline. Shell thin and fragile, white, covered with a thin, pale buff epidermis. Spire tall for the genus, 0-56 height of aperture. Whorls sculptured with moderately strong but narrow sharply raised spiral cords, ten to eleven on penultimate and twenty-three to twenty-six on the body-whorl, plus a few weak intermediates. Surface crossed by dense exceedingly fine axial growth lines. Anterior canal deeply notched; fasciole margined above by a sharply raised narrow ridge. Height 38 mm.; diameter 24-5 mm. (holotype). Height 32 mm.; diameter 21-0 mm. (paratype). Height 29 mm.; diameter 19-0 mm. (paratype). Height 32 mm.; diameter 19-0 mm. {elongata, St. 1952). Height 28 mm.; diameter 16-5 mm. [elongata, St. 1952).. Fig. F. Chlanidota signeya?ia, View of the whole animal with the mantle cut and folded back. Note the vestigial operculum, in relation to the size of the aperture (shown by crossed lines to the left). Dentition. Fig. L, 74, p. 194. Operculum. Fig. N, 129, p. 196. The central tooth has a wide but comparatively shallow base, deeply excavated below. Animal. The external features of the animal are shown in Fig. F. Type locality. St. 167. Off Signy I., South Orkneys, 6o° 50' 30" S, 460 15' 00" W, 20 Feb. 1927, 244-344 m- St. 162. Off Signy I., South Orkneys, 6o° 48' 00" S, 460 08' 00" W, 17 Feb. 1927, 320 m. Chlanidota paucispiralis , PI. VIII, figs. 36, 37 Shell small, thin and fragile, narrowly ovate, white, covered with a thin buff epidermis. Spire tall for the genus, o-6 height of aperture. Whorls sculptured with a few wide-spaced prominent but narrow, sharply raised, spiral ridges, four on penultimate and eleven on the body-whorl. Surface cro
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