164 DISCOVERY REPORTS 



Genus Harpovoluta Thiele, 1912 



Type (monotypy) : Harpovoluta vanhoffeni Thiele 



Harpovoluta charcoti (Lamy) 



Buccinum charcoti Lamy, 19106, p. 318. 



Buccinum charcoti Lamy, 1911a, p. 4, pi. 1, figs. 1, 2. 



Harpovoluta charcoti Thiele, 19 12, p. 271. 



Volutharpa charcoti Smith, 1915, p. 72. 



Volutharpa charcoti Eales, 1923, p. 33 (anatomy and radula). 



Type locality. Off King George Sound, South Shetlands, 420 m. 



St. 170. Off Cape Bowles, Clarence I., 61° 25' 30" S, 53 46' W, in 342 m. 



Range. South Shetlands, 420 m.; Clarence I., 342 m.; off Oates Land, 180-200 fathoms (Smith, 



i9i5)- 



Dentition. Eales (1923) gives a very full account of the anatomy, a figure of the dentition, and 

 refers this shellfish to the Volutidae. For some unaccountable reason, however, Thiele's Harpovoluta 

 was suppressed by Smith and Eales in favour of Volutharpa, which is, however, definitely Buccinoid. 

 The radula in charcoti is typically Volutid, consisting of a tricuspid central tooth only. 



Tomlin (1948, p. 229) recorded Harpovoluta vanhoffeni Thiele from 69 m. off Macquarie Island. 



Genus Provocator Watson, 1882 



Type (monotypy) : Provocator pulcher Watson 



Provocator cf. pulcher Watson 



Provocator pulcher Watson, 1882, p. 330. 



Provocator pulcher Watson, 1886, p. 260, pi. 13, fig. 5. 



Type locality. Off Cumberland Bay, Kerguelen I. 105 fathoms. Between Kerguelen I. and 

 Heard I., 150 fathoms (Challenger). 



St. WS 245. Between Falkland Is. and Patagonia, 52 36' S, 63 40' W, 18 July 1928, 304-290 m. 



The solitary ' Discovery ' example is a juvenile of only three post-nuclear whorls, but it tallies well with 

 Watson's detailed description of the adult holotype. The holotype is about 90 mm. in height (3-6 in.) 

 — the St. WS 245 example 32 x 14 mm. The present example has an excellently preserved ' Caricellid' 

 protoconch, the apical spike being prominent and curved to one side. The deep sutural sinus, concave, 

 smooth, enamelled subsutural band and delicately axially and spirally sculptured surface, are particularly 

 noticeable. In the holotype the outer lip bulges prominently outwards below the middle, but the 

 'Discovery' example lacks this feature, no doubt because this shell is juvenile. 



The animal is very contracted in the one available juvenile, but the elongate-oval foot is shown to be 

 strongly rugose on the posterior upper surface, and the head is broad with two rather flattened short 

 stout tentacles. There are no eyes. 



Dentition. The radula is typically Volutid, consisting of a long series of the usual tricuspid central 

 tooth. 



The finding of this genus in the Magellan Province represents a considerable westward extension of 

 the range of the genus, which previously was recorded only from the vicinity of Kerguelen and Heard 

 Islands. 



