PLANTS FROM ALASKA. 161 



Cladophlebis Huttoni (Dunker) Fontaine n. comb. 

 PI. XLI-XLIII. 



1846. Neuropteris Huttoni Dunk.: Monogr. d. Norddeutsch. Wealdenbildung., p. 9, 



pi. viii, fig. 1. 

 1849. Pecopteris Huttoni (Dunk.) Brongn. : Tableau, p. 107. 

 1869. Alethopteris Huttoni (Dunk.) Schimp.: Pal. Veg., Vol. I, p. 570 [by typ. error 



A. Murchisoni]. 

 1874. Alethopteris Huttoni (Dunk.) Schimp.: Op. cit., Atlas, p. 14, pi. xxxi, fig. 10. 

 1888. Aspidium Oerstedi Heer. Lesquereux: Proc. U. S. Nat. Mus., Vol. XI, p. 32 



in part, quoad Cat. U. S. Nat. Mus., No. 2434, Lesquereux's Nos. 918, 920, 



926, 927. 

 1888. Asplenium Fmrsteri Deb. & Ett. Lesquereux: Loc. cit. 



Five specimens of a large fern were collected by Mr. Woolfe. They 

 are rather poorly preserved and do not show the full character of the 

 plant. Four of these determined by Lesquereux as Aspidium Oerstedi 

 Heer and one as Asplenium Fcersteri Deb. & Ett. The narrower pinnules, 

 occurring on one of the imprints, are not unlike some of those of Aspidium 

 Oerstedi. The collection of Mr. Dumars contains several large slabs of 

 rock, which show a number of imprints of this form better preserved and 

 more complete than those of Mr. Woolfe. The}' are also mostty from 

 different parts of the plant. These show that the plant is a fern that 

 can not well be distinguished from the fossil that Dunker described from 

 the Wealden of Hanover, with the name Neuropteris Huttoni. This seems 

 to have l^een the only specimen ever found. As it is onh^ a small frag- 

 ment it can not show the full character of the plant. Schenk examined 

 this specimen and approved of Schimper's name for it, Alethopteris 

 Huttoni." He gives a figure of it differing somewhat from that of Dunker, 

 and probably a more nearly correct one. Dunker figures the plant as 

 having two complete pinnae attached to a large rachis, portions of which 

 show the original width. Schenk's figure shows the principal rachis with 

 all of the margin on one side wanting, so that the true width is not seen. 

 The only attached pinna is the upper one, and the end of that is wanting. 

 The next lower pinna has the end preserved, but its full length is probably 

 not given, as the base is defective and the pinna visible is only a portion 



« Foss. Flor. der Nordwestdeutsch. Wealdenformation (Palaeoatographica, Vol. XIX, 1871), p. 217 [15], 

 pi. xxix [viii], figs. 1, la. 



MON XLviri — 05 11 



