io 4 DISCOVERY REPORTS 



Brookula pfefferi n.sp., PL V, fig. 8 



Shell minute, solid, white, globose-turbinate, umbilicate, sculptured with crisp axial ribs and finer, 

 closely spaced spiral threads. Whorls 4 J, including a smooth, globular protoconch of one whorl. Spire 

 equal to height of aperture. Aperture circular with complete simple peristome. Axial sculpture of 

 crisp narrow radials becoming weaker over the base, about twenty-four on the penultimate. Spiral 

 threads about 12 on the penultimate and twenty-four on the body whorl, plus four very much stronger 

 broad flat-topped cords within the funnel-shaped umbilical cavity, which rapidly contracts to a small 

 deep pit. Operculum horny, circular and multispiral. 



Height 2-0 mm. ; diameter 1-75 mm. 



Type locality. St 144. Off mouth of Stromness Harbour, South Georgia, from 54 04' S, 36 27' W 

 to 53 58' S, 36 26' W, 5 Jan. 1927, 155-178 m. (the holotype only). 



This species is closely allied to calypso Melvill & Standen (19 12) which is smaller, 1 x 1-15 mm., 

 and lacks the four strong umbilical spirals. 



Brookula strebeli n.sp., PL V, fig. 7 



Shell minute, white, elongate-turbinate, imperforate, sculptured with crisp axial ribs and spiral 

 threads. Whorls 3f, including a smooth, globular protoconch of one whorl. Spire slightly taller than 

 height of aperture. Aperture circular v/ith complete simple peristome. Axial sculpture of prominent 

 rounded radials becoming weaker over the base, about twenty-three on the penultimate. Spiral 

 sculpture consisting of six moderately strong lirations on the upper spire-whorls and about sixteen on 

 the body-whorl ; they continue strongly for a short distance over the periphery and then suddenly 

 diminish to minute, closely spaced threads, too indistinct to count, and finally there are four stronger 

 spirals around the closed umbilical area. 



Height 1-5 mm.; diameter 1-25 mm. 



Type locality. St. 144. Off mouth of Stromness Harbour, South Georgia, from 54 04' S, 

 36 27' W to 53 58' S, 36 26' W, 5 Jan. 1927, 155-178 m. (the holotype only). 



This species is smaller than pfefferi, taller, imperforate and differently sculptured. 

 The names of Pfeffer and Strebel are associated with the two above new species in recognition of 

 their respective major contributions on South Georgian molluscan systematics. 



Brookula decussata (Pelseneer) 



Cychstrema deaissatum Pelseneer, 1903, pi. 5, fig. 48. 



Type locality. Bellingshausen Sea, 70 S, 8o° 48' W. 

 St. 182. Schollaert Channel, Palmer Archipelago, 64 21' S, 62 58' W, 14 Mar. 1927, 278-500 m. 



The specimens from St. 182 seem to be identical with Pelseneer 's species as far as I can judge from 

 the rather sketchy illustration. They are very similar to pfefferi, but are smaller and have crisp, more 

 definite sculpture with more numerous axials but fewer spirals. 



Family TURBINIDAE 



Genus Homalopoma Carpenter, 1864 



Type (monotypy): Turbo sanguineus Linn. = Leptothyra Dall, 1871 (non Pease 1869) 



Homalopoma cunninghami Smith 



Collonia cunninghami Smith, 1881, p. 33, pi. 4, fig. 10. 

 Leptothyra cunninghami Pilsbry, 1888, d. 249. 



