A snrvey of the Pliytogeography of the Aratic American Archipelago 
Island, J. C. Ross (KH); Mansfield Island, Bell (ex Holm, i. c.)l; Baffin Land: Big 
Island' and White Strait, Tarr (ex Rowlee & Wiegand, 1. c). Cape Searle, Tayloe 
(1. c). Possession Bay, John Ross (NHM), Ponds Bay, Walker (ex Hooker. Exp. 
Fox), Borden (ex Macoun, App. Neptune), Navy Board Inlet, Lyall (KH), Port 
Bowen, Parey (LS, NHM, KH); Melville Island, Parry, Fisber, Edwards, J. C. 
Ross (NHM), Sabine (KH, NHM), M'Millan (ex Macoun, App. Arctic), M'Clintock 
(KH) Beverley (KH), herb. Menzies (LS), herb. Trevelyan (CH), Winter Harbour, 
Hennessey (App. Arctic); Lowther Island. M'Clintock (ex Markham, 1. c.); Cornwallis 
Island: Assistance Bay, Sutherland (KH); EUef Ringnes Island, Isachsen (ex Simmons 
Stray Contr.); North Devon: Cuming Creek. Borden (ex Macoon, App. Neptune), Powell 
Creek Lyall (KH), Beechey Island, Pullen, Lyall (KH, SH), Horner (KH), Borden 
(ex Macoun, App. Neptune), M'Clintock (ex Markham, I. c), east side o£ Wellington 
Channel, Lyall (KH, SH), Mount Belcher, Cape Hawes, Cape Vera, West Fjord, 
SiMMON» (I. c); North Kent, Simmons (1. c); Heiberg Island, Sche. (ex Simmons I cJ; 
Ellesmereland: extremely common. Hart, Geeelv, Simmons; Bartlett (NHM, CH), 
Borden (ex Macoun, App. Neptune), Goodsell and Wolp (ex Rydberg, 1. c), 
Certainly this plant is one of the niost comn,on of the Archtpelago, but st.ll 
records are wanting for so.ne even among the larger islands, meluded, eunously 
enongh, Victoria Land. On the other hand there are son,e specimens in the collec 
tions whose provenience cannot be acconnted for, such as from .Arctic America, 
M'Clure. (KH, SH) and »Low Island, J. C. Ross. (KH). As is well known, it is 
a very a yariable plant also, and a great n.any species have been establ^hed within 
its range of forms, the newest being the D. Bellii of Holm (\ c 338). Macoun, 
in App Arctic, bas given a good 6gure which still more evidently than ,he dia- 
gnosis of Holm shows that a form of D. alpma is meant. 
117. Arabis arenicola, (Richards.) Gelert. 
A. hispida, HOOKKE, App. Paeby 11 (?). 
Distribution Victoria Land: south coast. Rae (KH); [Melville Peninsula: 
Repulse Bay, Parry (NHM), Igloolik, Parry (ex Hooker, l.c.)): Ellesmereland: 
Discovery Harbour. Greely, Beitstad Fjord in Hayes Sound, Simmons. 
Geographic area Greenland, arctic and northem temperate parts of America. 
I think I am right in regarding the A. hispvla of Hooker (1. c, p. 388) as a 
synonym of this species notwithstanding its being recorded only from Igloohk and 
the specimen as stated in the label, fonnd at Repulse Bay. Gelert (Not. Aret 
Pl, p. 287) who has closely studied the synonyniics of this plant has transferred 
au american records of A. petr^a to it, and if no confusion with other species 
exists in Macoun's Cat. we should get a range for it extending rather far south m the 
temperate region, but in the north it is, as tar as hitherto shown, a very rare plant. 
From the Continent (arctic and especially subarctic parts) I have seen a good many 
•^['ecinifiis iu the London collectioDS. 
