BABINGTON, ARCTIC LICHENS; 523 



Cetraria nivalis, Fries. Near Cape York. 



Parmelia triptophylla, var. Schraderi, Fries. Assistance Bay. 



P. fulgens, Sw. (?) Assistance Bay. 



P. coarctata, Sw. (?) Assistance Bay. 



P. stygia, L., var. lunata, Fries. (^Cornieularia lanata, 



Auctt.) 

 P. elegans, Ach., and var. a, miniata, Schser. The latter 



near Assistance Bay. 

 P. aurantiaca, var. 7, calva, Fries. Assistance Bay. 



P v^telHna*^' ^^^* j C'ornwallis Island, on a bone implement. 



P. pulverulenta, Ach., var. Fries. (P. pitt/rea, Ach.) 



Umbilicaria hyperborea, Hoffm. 



U. proboscidea, L.. var. a, Fries (two forms). 



U. vellea, Fries, var. lecidina, Bab. Near Cape York. 



Urceolaria scruposa, Ach. (?). Assistance Bay. 



Lecidea geographica, var. contigua. Fries. Assistance Bay. 



L. atroalba, Ach. Assistance Bay. 



L. lapicida (?), Fries. Assistance Bay. 



L. confluens, Fries et Auct. pr. p. Assistance Bay. 



L. contigua, var. calcarea, Fries. Assistance Bay. 



L. vesicularis, var. globosa. Fries. Assistance Bay. 



L. sp. Assistance Bay. 



Alga. 



Protococcus nivalis. Assistance Bay. 



LXXVIII. — An Account of the Plants collected by Dr.;! 

 Walker in Greenland and Arctic America, during 

 the Expedition of Sir Francis M'Clintock, R.N., in 

 the Yacht "Fox." By J. D. Hooker, Esq., M.D., 

 F.E.S., F.L.S., &c. (Bead June 21, 1860.) Reprinted, by 

 Permission, from the Proceedings of the Linnean Society, 

 Botany, vol. v., 1861, pp. 79-89. 



On the termination of Capt. M'Clintock's memorable voyage, 

 the Plants collected by Dr. Walker, surgeon and naturalist to the 

 Expedition, were placed in my hands by that officer for determi- 

 nation, together with some accurate notes of the localities, and of 

 the temperature of the soil and air to which they are exposed in 

 their native habitats. Though containing no absolute novelties 

 amongst Flowering Plants,* Dr. Walker's herbarium is a parti- 

 cularly interesting one, both from the thorough manner in which 

 that officer explored the localities he visited, and from the proximity 

 of one of his stations (Port Kennedy, in the Boothian peninsula) 

 to the magnetic pole. The florula of that province is further im- 



* Amongst the Cryptogamic plants are two Algae of great rarity, and three 

 new Fungi. 



