SYSTEMATIC 83 



Type locality. South Georgia (littoral). 



St. 45. 27 miles S 85 E of Jason Lt., South Georgia, 6 Apr. 1926, Shore Coll. 



St. 163. Paul Harbour, Signy I., South Orkneys, 17 Feb. 1927, 18-27 m - 



St. 164. East end of Normanna Strait, South Orkneys, 18 Feb. 1927, 24-36 m. 



St. 166. South-east point of Paul Harbour, Signy I., South Orkneys, 19 Feb. 1927, Shore Coll. 



St. 173. Port Foster, Deception I., South Shetlands, 28 Feb. 1927, 5-60 m. 



St. 179 Melchior I., Schollaert Channel, Palmer Archipelago, in creek to south of south-west anchorage, 



10 Mar. 1927, 4-10 m. 

 St. 456. 1 mile east of Bouvet I., 18 Oct. 1930, 40-45 m. 

 St. 1092. Signy I., South Orkneys, 23 Jan. 1933, Shore Coll. 

 St. i486. Harmony Cove, Nelson I., South Shetlands, 3 Jan. 1935, Shore Coll. 

 St. 1487. Desolation I., Livingston I., South Shetlands, 8 Jan. 1935, Shore Coll. 



Wilhelmina Bay, Danco Land, South Shetlands, 64 30' S, 62 W, 8 Feb. 1922, 1-8 fathoms, A. G. 



Bennett. 

 St. WS 564. Moltke Harbour, South Georgia, 24 Feb. 1931, in rock pool. 



Range. South Georgia, South Orkneys, South Shetlands, Palmer Archipelago and Bouvet Island 

 ('Discovery'), Seymour I. and Paulet I. (Strebel, 1908), 0-60 m. 



This strictly Antarctic limpet is, typically, large, elevated, oblongovate, lightly built, sparingly and 

 weakly radially ribbed, mostly smooth, drab externally and more or less uniformly bronzy black within. 

 Examples from below the littoral are of paler colour — bronzy reddish brown within. 



Length 51 mm.; breadth 36 mm.; height 23 mm. (South Georgia). 



Length 48 mm.; breadth 35 mm.; height 26 mm. (South Georgia). 



Length 48 mm.; breadth 34 mm.; height 25 mm. (South Shetlands, St. 1487). 



Length 58 mm.; breadth 42 mm.; height 19 mm. (Palmer Archipelago, St. 179). 



Patinigera polaris concinna (Strebel) 



Patinella polaris concinna Strebel, 1908, p. 82, pi. 5, figs. j6a-e, j8a, b. 

 Type locality. Cumberland Bay, South Georgia, 15-25 m. 



A. Typical form, with crisp radials: 



St. 145. Stromness Harbour, South Georgia, between Grass I. and Tonsberg Point, 7 Jan. 1927, 26-35 m - 



St. WS 25. Undine Harbour (north), South Georgia, 17 Dec. 1926, 18-27 m - 



St. MS 12. East Cumberland Bay, 1 cable E to 1 mile S x E^, east of Hobart Rock, South Georgia, 17 Feb. 1925, 



25-53 m- 

 St. MS 66. East Cumberland Bay, z\ miles south-east of King Edward Point Lt. to ii cables W x N of Macmahon 



Rock, South Georgia, 28 Feb. 1926, 18 m. 



B. Depressed form, radials obsolete towards margin: 



St. MS 6. East Cumberland Bay, \ mile south of Hope Point to 1 \ cables S x E of King Edward Point Lt., 



12 Feb. 1925, 24-30 m. 

 St. MS 10. East Cumberland Bay, \ mile south-east of Hope Point to \ mile south of Government Flagstaff, 



14 Feb. 1925, 27 m. 

 St. MS 71. East Cumberland Bay, 9J cables E x S to 1-2 miles E x S of Sappho Point., South Georgia, 9 Mar. 

 1926, 110-60 m. 

 Range. South Georgia, 1 5-1 10 m. 



A benthic form of polaris. Typically it is small, thin-shelled, moderately elevated, with narrow, crisp 

 radials crossed by dense concentric growth lines. Colour buff, blotched or variously marked in reddish 

 brown. With it (Form B) is a very depressed form which reaches a larger adult size and is probably the 

 adult concinna. It commences with crisp radials on a normally conic shell, but later flattens out, the 

 radials become either obsolete or are present as very weak corrugations, but the concentric growth lines 

 persist over the whole shell. 



