10 GEOLOGICAL SURVEY OF THE TEREITOEIES. 



perpendicular to the veins, which preserve the same thickness in their 

 whole length. Identical in characters with the Enropean species. 



Vitis Islandica, (?) Heer, Fl. Arc, PI. xxvi, Figs. 1 and 7a. Three 

 broken undistinct specimens of loba.te leaves, whose nervation is like 

 that of Fig. 7ci, loc. cit., are doubtfully referred to this S])ecies, most of 

 the outlines of the leaves being destroyed. They might be referable to 

 V. OlriJci, Heer, which has been obtained in better specimens at Evans- 

 ton. 



DoMBEYOPSis ^QUIFOLIA, Gopp., Fl. Ter. Schles., p. 22, PI. iv. Fig. 4, 

 and PI. V, Fig. 2a. The leaf representing this species is only smaller 

 tlian those iignred by Goppert, loo. cit. The form, however, and the 

 nervation are alike. It is broadly cordate, equal, entire on the borders, 

 with 5to.7 primary veins from the base; medial vein branching at a dis- 

 tance above the base; upper basilar veins much divided outside; fibrilies 

 thick, parallel. The specimen shows only the lower half of one leaf. 



JuGLANS KUGOSA, Lsqx. My remarks on J. rhamnoides, in Report, p. 

 294, apply to some forms of this species as represented by the numerous 

 specimens of this locality. The discussion on the value of our Ameri- 

 can species is fallible as long as the descriptions are not elucidated by 

 figures. I preserve this species on account of the small size and the 

 form of the lateral leaflets, which are much shorter and broader toward 

 •the base, sometimes cordate, and also for the more deeply marked 

 nervation. The surface of the leaves is generally runcinate by the de- 

 pression of the veins and veiulets. 



3. Eyanston, above the coal. 



Specimens on a hard, ferruginous shale of the same nature as that of 

 Point of Eocks.* 



Phragmites Oenengensis, A1. Br. I refer to this species part of a 

 stem about half an inch broad, with primary veins deep, strong, sepa- 

 rated by intermediate very thin ones, articulated, marked at the artic- 

 ulation by the round scar of a branch. It is more deeplj^ striated 

 than in most of the specimens figured of this species. Sismonda in 

 Pal. du Piemont, PI. vi, Figs. 3-5, has a branch of the same kind. 



Populus Eici-iaedsoni, Heer, FL Arc, p. 98. The specimen is of the 

 same form as the one in PI. Iv, Fig. 3*^, and still better preserved. It is 

 a large ovate-cordate, pointed leaf witli borders undulately, obtusely cre- 

 nate ; five primary basilar nerves, the exterior ones much branch- 

 ing outside, the two lowest curving in a very open angle toward the 

 borders ; the intermediate ascending more obliquely to near the point ; 

 tertiar^^ nervation very distinct. 



Salix Svanstoniana, sp. nov. Leaf ovate-lanceolate, (1) (upper part 

 broken,) rounded to the base, with apparently entire borders; lower 

 pairs of veins (two pairs) shorter, nearly horizontal ; superior ones 

 longer, on a more acute angle of divergence, at various distances from 

 each other, irregular in directions, curving near and along the borders, 

 separated by shorter tertiary veins. This species has the nervation of 

 S. macrophylla, Heer, especially as figured in Fl. Ter. Helv., PI. Ixvii, Fig. 

 4, and our specimen could be referred to it but for the form of the leaf 

 appearing entire, merely ovate-pointed, much shorter, and by the me- 

 dial nerve, which is narrow proportionally to the thick secondary veins 

 and nervilles. These are distinct, perpendicular to the veins. 



CoKYLiJS McQuAKEii, Heer, Report, p. 292. One specimen bears 



* Eepoifc, p. 291. 



