SYSTEMATIC 87 



Type localities. Falkland Is. (conica and jalklandicd) ; Kerguelen I. (analoga). 

 St. 27. West Cumberland Bay, South Georgia, 3-3 miles S 44 E of Jason L., 15 Mar. 1926, no m. 

 St. 42. Off mouth of Cumberland Bay, South Georgia, 1 Apr. 1926, 120-204 m. 

 St. 144. Off mouth of Stromness Harbour, South Georgia, 5 Jan. 1927, 155-178 m. 

 St. 156. Off north coast of South Georgia, 53° 51' S, 36 21' 30" W, 20 Jan. 1927, 200-236 m. 

 St. 159. North-east of South Georgia, 52° 52' 30" S, 36° 08' W, 21 Jan. 1927, 160 m. 

 St. 170. Off Cape Bowles, Clarence Is., 6i° 25' 30" S, 53 46' W, 23 Feb. 1927, 342 m. 

 St. 175. Bransfield Strait, South Shetlands, 63° 17' 20" S, 59 48' 15" W, 2 Mar. 1927, 200 m. 

 St. 1562. Near Marion I., from 46 51' 7" S, 37 56' 5" E to 46 54' 8" S, 37 53' 8" E, 7 Apr. 1935, 97-104 m. 

 St. WS 85. 8 miles S 66° E of Lively I., East Falkland Is., 25 Mar. 1927, 79 m. 

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

 St. WS 246. South-west Falkland Is., 52 25' S, 6i° W, 19 July 1928, 267-208 m. 

 St. WS. 799. North-west of Falkland Is. 48 04' 15" S, 62 48' 07" W, 21 Dec. 1931, 141-137 m. 

 St. WS 824. South-east of Falkland Is., 52 29' S, 58 27' W, 19 Jan. 1932, 146-137 m. 

 St. MS 71. East Cumberland Bay, 9^ cables E x S to 1-2 miles E x S of Sappho Point, 9 Mar. 1926, 110-60 m. 



Range. Approximately Magellan to Kerguelen I. (possibly Macquarie Island) and south to Bransfield 

 Strait, 60-342 m. (449 fathoms, Dall, 1889, loc. cit.). 



Length 16-0 mm.; breadth 9-8 mm.; height 11-4 mm. (St. 27). 



Length 9-0 mm. ; breadth 6-0 mm. ; height 5-2 mm. (St. WS 228). 



Length 8-8 mm. ; breadth 6-o mm. ; height 6-8 mm. (St. 170). 



Length 7-0 mm.; breadth 5-25 mm.; height 4-25 mm. (noachina, Pilsbry, 1890, p. 230). 



Forbes & Hanley (1850) state that their largest example of noachina 'measures four lines in breadth 

 and rather exceeds five in length'. 



Dentition. (Fig. G, 2, p. 189, from example of length 16 mm., breadth 9-8 mm., height 11-4 mm., 

 St. 27.) The four laterals are all narrow and lie erect and parallel to the axis of the central, not oblique 

 to it as in noachina (Fig. G, 1, p. 189). 



Genus Parmaphorella Strebel, 1907 

 Type (monotypy): Tugalia antarctica Strebel 1907 {non Melvill & Standen 1907) 



(See Tomlin, 1932, p. 163) 

 Parmaphorella melvilli (Thiele) 



Tugalia antarctica Melvill & Standen, 1907, p. 98, pi., fig. 1 (non Strebel, 1907). 

 Tugalia melvilli Thiele, 1912, p. 257. 



Type locality. Burdwood Bank, South of Falkland Is. in 56 fathoms. 



St. 388. Off Tierra del Fuego, 56 19V S, 67 09!' W, 16 Apr. 1930, 121 m. 



St. WS 825. North-east of Falkland Is., 50 50' 00" S, 57 15' 15" W, 18-19 Jan. 1932, I35-J44 m. 



Dentition. Fig. G, 3, p. 189. oo + (i + i+4)+i+(4+i + i) + co. Central tooth broad but reduced 

 above to a comparatively narrow cutting edge. Four narrow laterals lying parallel to the oblique sides 

 of the central— fourth lateral pointed but without a cutting edge— fifth lateral massive, hooked and with 

 a prominent cusp in addition to the terminal cutting point. There is a sixth incipient or obsolescent 

 lateral, which is less than half the size of the fifth. Similar accessory plates are shown in Puncturella and 

 in Thiele's figures of the dentition of several Fissurellids, e.g. Emarginula obovata, E. elongata and 

 Scutus australis (1891). The marginals are very numerous, slender and curved, and all are delicately 

 cusped towards the outer extremity. 



Three species of the genus are known: antarctica (Strebel, 1907) from Strait Le Maire, Tierra del 

 Fuego ; melvilli (Thiele, 1 9 1 2) and barnardi (Tomlin, 1932) from Cape Point, South Africa, in 180 fathoms. 



