396 GEOLOGICAL SUEVEY OF THE TERRITOEIES. 



Our leaf is slightly smaller, bat exactly of the same form and nerva- 

 tion as that published by Heer from North Greenland. It evidently 

 differs from V. marginatum by its more rounded and elongated form, by 

 the nervation less deeply marked, the veins not blackened, and less 

 divided, the upper secondary veins simple, the tertiary areolation more 

 deeply and equally marked, and the borders less deeply, acutely, and 

 equally dentate. In the Spitzberg flora Professor Heer has described 

 and figured PI. XIII, Figs. 3 to 23, some fruits which he refers to this 

 species. Their form is different from that of the fruit of Viburnum mar- 

 ginatum^ which resembles that of Fig. 24, of the same plate, referred to 

 Viburnum mocrospermum., Heer, known only from seeds, ours being 

 merely slightly smaller, with a small point in the middle of the round 

 truncate top. » 



VlBUE,NUM CONTORTUM, sp. UOV. 



Leaves small, obovate or nearly round, unequal at base, rounded on 

 one side, attenuated at the other, curved ; borders entire or obscurely 

 serrate ; nervation, pinnate, craspedodrome. 



Two leaflets of this species, which might be considered as varieties of 

 Viburnum marginatum, but for the irregular and different form of the 

 leaves, and their entire borders ; one of the leaves, however, is slightly 

 toothed. The nervation is of a same type, but the secondary veins more 

 distant and less numerous. 



CiSSrS LOEATO-CRENATUS, sp. HOV. 



Leaves thiekish, coriaceous,smooth, nearly square in outline ; abruptly, 

 short obtusely pointed, round truncate to abroad petiole, crenate short- 

 lobed all around; nervation, tri-nerved from the base, alternately pin- 

 nate uj)wards, craspedodrome. 



A number of leaves variable in size from 2J to 9 cent., nearly square, 

 with generally two obtuse, short lobes on each side, crenate like the 

 borders between them. The basilar veins branch outside, and pass into 

 the obtuse point of a lobe. The smallest of these leaves are somewhat 

 like some varieties of Populus mutabilis var. repando-crenate, Heer ; far 

 different, however, by the nervation. 



YiTis TRicuspiDATA, Heer, Fl. Bait., p. 91, PL xxviii, Figs. 18 and 19. 



Leaves small, enlarged on the sides, three-lobate, lobes pointed, spar- 

 ingly dentate. 



Our specimens present a true counterpart of the figures given of this 

 species. It is related to the former. In the small leaves,the teeth are slight- 

 ly obtuse,but in the large ones they become,with the iobes,more distinctly 

 pointed. Per contra, the large leaves of Cissus lobato-crenatus are 

 more and more obtusely and obscurely crenate and dentate. Both forms, 

 hovever, may represent varieties of one species of Cissus. No transi- 

 tion is remarked from one form to the other in our specimens. 



Magnolia Inglefieldi (I), Heer, Fl. Arct., p. 120, PI. xviii, Fig. 1. 



Leaf elliptical, subcoriaceous, entire, medial nerve thick ; secondary 

 veins distant, camptodrome. 



The leaf resembles by its form the figure quoted above ; the nervation 

 appears about the same, differing only by the lowest secondary veins 



