l66 DISCOVERY REPORTS 



This species has only two columellar plaits, whereas fragiUima has four. There is a third member of 

 the genus, Paradmete curta Strebel (1908), from off Shag Rock Bank, north of South Georgia, in 160 m. 



Melvill & Standen's Mitra (Vohttomitra) porcellana (1912) from Scotia Bay, 9-10 fathoms, South 

 Orkneys, is not congeneric and will probably prove to be a Marginella. 



Paradmete percarinata n.sp., PI. IX, fig. 57 



Shell broadly ovate, with a prominent peripheral carina, a flat shoulder, and a short, tabulated spire. 

 Whorls four, exclusive of the protoconch, which is missing. Spire-whorls with the carina slightly 

 below the middle, the flat-sloping shoulder with the upper half smooth and the lower half with five to 

 six linear-spaced, weak, spiral threads; the area below the carina straight, slightly undercut, and 

 sculptured with four to six linear-spaced spirals. Body-whorl and base with about forty-five spirals 

 between the carina and the fasciole, which is devoid of spirals. Axial sculpture confined to weak, 

 irregular growth lines. Aperture long and narrow, produced below into a short anterior canal. Outer 

 lip thin, inner lip with three columella plaits, upper two well developed, lowest one weak. 



Height 16-5 mm. (estimated, 17 mm.); diameter 10-5 mm. 



Type locality. St. 1957. Off south side of Clarence I., 7 miles east of Cape Bowles, South 

 Shetland Is., 3 Feb. 1937, 785-810 m. (one empty shell). 



In form this species closely resembles Cancellaria (Admete) carinata Watson (1886, pi. 18, fig. 9) 

 from Kerguelen Island in 28 fathoms, but Watson's species has 'two indistinct folds' on the pillar, 

 which suggests that it is correctly placed in the Cancellariidae. The well-developed plaits in percarinata, 

 on the other hand, are of similar style and strength to those of both fragiUima and longicauda. 



Paradmete crymochara (Rochebrune & Mabille) 



Mitra crymochara Rochebrune & Mabille, 1885, p. 102. 



Mitra crymochara Rochebrune & Mabille, 1889, p. H 49, pi. 3, fig. 1. 



Type locality. South-east of Tierra del Fuego, 220 m. 

 St. 388. Between Cape Horn and Staten I., 56 19*' S, 67 09!' W, 16 Apr. 1930, 121 m. (two empty shells). 



Height 12-0 mm. ; diameter 6-o mm. (holotype). 



Height 20-5 mm.; diameter 7-25 mm. (St. 388). 



Although the ' Discovery ' specimens are much larger than the holotype of crymochara they seem to be 

 the adult of that species. The shell is narrowly ovate-fusiform, has a smooth papillate protoconch of 

 z\ whorls, the tip asymmetrical, four well-developed plaits on the pillar, a weakly defined shoulder 

 bearing three fine spiral threads and dense subobsolete spiral lirations over the remainder of the whorls. 

 The whole shell is covered with a thin, pale buff epidermis. 



Family CANCELLARIIDAE 



Genus Admete Kroyer, 1842 



Type (monotypy): Admete crispa Moeller, 1842 



Admete magellanica Strebel 



Admete magellanica Strebel, 19056, p. 594, pi. 22, fig. 2ga-d. 

 Admete magellanica Melvill & Standen, 1907, p. ill. 



Type locality. Smyth Channel, Strait of Magellan. 

 St. WS 84. i\ miles S 9 W of Sea Lion I., East Falkland Is., 52 33' S, 59 08' W to 52° 34' 30" S, 59 11' W, 



24 Mar. 1927, 75-74 m. 

 St. WS 228. North-east of Falkland Is., 50 50' S, 56 58' W, 30 June 1928, 229-236 m. 

 St. WS 243. Between Falkland Is. and Patagonia, 51° 06' S, 64 30' W, 17 July 1928, 144-141 m. 



