172 DISCOVERY REPORTS 



Belalora thielei n.sp., PI. VI, fig. 20 



Shell small, biconic, with turreted spire and sculptured with strong axials and dense spiral lirations. 

 Whorls six, including a relatively large, bulbous to dome-shaped sculptured protoconch of three whorls, 

 as described above. Spire equal to height of aperture plus canal. Spire-whorls with a prominent 

 slightly concave shoulder; outline steep from below the shoulder and sculptured with prominent, 

 bluntly rounded, slightly protractively oblique axials, fourteen on the penultimate and fifteen on the 

 body-whorl. All post-nuclear whorls crossed by dense spiral lirations, six to eight weak spirals on the 

 shoulder and twelve strong spirals from the shoulder to the lower suture of the spire-whorls. Body- 

 whorl, including base, with about fifty-eight spirals, much finer on the shoulder, the fasciole, and neck. 

 Aperture narrowly ovate-pyriform with a short, broad anterior canal and a deeply concave posterior 

 sinus, occupying the shoulder. Inner lip strengthened by a massive, smooth, rounded parietal- 

 columellar callus, which is separated from the base by a narrow excavated area. There is a conspicuous, 

 bulging fasciole. 



Height 7-1 mm.; diameter 3-7 mm. (holotype, St. WS 801). 



Type locality. St. WS 801. North-west of Falkland Is. to Patagonia, 48 26' 15" S, 61 ° 28' W, 

 22 Dec. 1 93 1, 165-165 m. 



St. WS 216. North of Falkland Is., 47 37' S, 6o° 50' W, 1 June 1928, 219-133 m. 



St. WS 797. North-west of Falkland Is. to Patagonia, 51 06' S, 64° 10' 30" W. to 47 47' 43" S, 64 07' 30" W, 



19 Dec. 1931, 117 m. 



St. WS 808. From 49 41' S, 65° 40' W to 49 39-5 S, 65 44' W, 8 Jan. 1932, 1 10-106 m. 



Protoconch. Fig. N, 115, p. 196. 



Genus Pleurotomella Verril, 1873 

 Type (monotypy): Pleurotomella packardi Verril Recent, north-east coast of U.S. 



The first species recorded below has a three-whorled, conical, pale brownish, ' sinusigerid ' proto- 

 conch, a Daphnellid reversed L-shaped sinus and general features closely similar to the north-east 

 American genotype. Dall (18896, pp. 119-26) has described or recorded a number of deep-water 

 species from the West Indies. He accounts for the presence of two types of protoconch in the genus by 

 a suggestion that the smooth, shelly nucleus is an infilling of a horny 'sinusigerid' envelope which has 

 subsequently weathered away (loc. cit. p. 124). 



The remaining two species recorded below have this blunt, white, shelly, few-whorled protoconch, 

 and the ohlini material, several of which contain the animal, resemble typical Pleurotomella in the lack 

 of an operculum. 



Pleurotomella simillima Thiele 



Pleurotomella simillima Thiele, 1912, p. 216, pi. 14, fig. 8. 

 Type locality. Gauss Station, Davis Sea. 



St. 1660. Ross Sea, 74° 46-4' S, 178° 23-4' E, 27 Jan. 1936, 351 m. (one empty shell). 

 Protoconch. Fig. N, 117, p. 196. 



Pleurotomella? ohlini (Strebel) 



Thesbia ohlini Strebel, 1905 b, p. 592, pi. 22, figs. 22, 22a. 

 Type locality. Fortescue Bay, 10-12 fathoms, Strait of Magellan. 

 St. WS 212. North of Falkland Is., 49 22' S, 60° 10' W, 30 May 1928, 242 m. 

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

 St. WS 244. West of Falkland Is., 52° S, 62° 40' W, 8 July 1928, 253-247 m. 



Protoconch. Fig. N, 116, p. 196. 



