SYSTEMATIC 171 



Genus Lorabela n.g. 

 Type : Bela pelseneri Strebel 



Bartsch (1941) reviewed the Boreal Turrids of the groups previously ascribed to Bela, Lora, 

 Oenopota and Propebela and proposed ten new genera and subgenera. He explained, as I did, inde- 

 pendently (Powell, 1942, pp. 9, 12 and 16), that Bela Gray, 1847, applies to the Mangeliinae and Lora 

 Gistel, 1848, was proposed as a n.nom. for the preoccupied Defrancia Millet, 1826 = Pleurotomoid.es 

 Bronn, 1831, an Italian Miocene member of the Mangeliinae. The available names for the 'Bela' 

 auct. shells are thus restricted to Oenopota Moerch, 1852, Propebela Iredale, 1918, and the ten new 

 propositions of Bartsch. 



A group of Antarctic shells, typified by the South Georgian Bela pelseneri, resembles the boreal 

 Propebela in build and adult sculptural plan of strong axials crossed by regular spiral cords, but has 

 a smooth, paucispiral protoconch and a deep rounded anal sinus occupying the shoulder. 



The protoconch in Propebela has a smooth initial whorl followed by one bearing spiral threads and 

 finally a brephic stage with the spirals crossed by weak, closely spaced axial riblets. The anal sinus is so 

 shallow that it is scarcely apparent. 



The genotype of Lorabela has a vestigial, thin, oval operculum with a terminal nucleus and radula 

 very similar to that of Propebela turricula, which consists of bundles of slender, twisted rods. 



Lorabela pelseneri (Strebel, 1908) 



Bela pelseneri Strebel, 1908, p. 15, pi. 2, fig. 27 a, b. 

 Type locality. Cumberland Bay, 252-310 m., South Georgia. 

 St. 45. 27 miles S 85° E of Jason Lt., South Georgia, 6 Apr. 1926, 238-270 m. 



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. 



Lorabela notophila (Strebel) 



Bela notophila Strebel, 1908, p. 16, pi. 2, fig. 28a, b. 

 Type locality. Cumberland Bay, 252-310 m., South Georgia. 

 St. 123. Off mouth of Cumberland Bay, South Georgia, from 4-1 miles N 54 E of Larsen Point to 1-2 miles S 



62 W of Merton Rock, 15 Dec. 1926, 230-250 m. 

 St. 149. Mouth of East Cumberland Bay, South Georgia, from 1-15 miles N 76^° W to 2-62 miles S n° W of 



Merton Rock, 10 Nov. 1927, 200-234 m. 

 St. WS 27. Off northern end of South Georgia, 53 55' S, 38 01' W, 19 Dec. 1926. 



Protoconch. Fig. N, 114, p. 196. 



Lorabela plicatula (Thiele) 



Bela plicatula Thiele, 1912, p. 215, pi. 14, fig. 4- 

 Type locality. St. 1660. Ross Sea, 74 46-4' S, 178 23-4' E, 27 Jan. 1936, 351 m. 



Genus Belalora n.g. 

 Type: Belalora thielei n.sp. 

 This genus resembles Propebela in build and adult sculpture, but has a relatively larger, more dome- 

 shaped protoconch consisting of a smooth planorbid tip, a whorl of closely spaced spiral threads and, 

 finally, a whorl of spiral ribs crossed by axial threads. As in the previous genus, Lorabela, the posterior 

 sinus is deep and rounded. There is a vestigial oval operculum with a terminal nucleus. Theile s Bela 

 striatula (1912, p. 215, pi. 14, fig- 3), from Gauss Station, Davis Sea, belongs to this genus. It has the 

 same style of protoconch as thielei, but the post-nuclear axials are more numerous. 



