FONTAINE, ] THE EMMONS COLLECTION. 281 
about 14 cm., distinct from the lower termination of the first-men- 
tioned primary pinna, and it is so placed that if the two were pro- 
longed downward they would meet under an angle of 45°. This 
smaller pinna looks as if it were sent off lower down from the larger 
rachis, or probably from near the summit of a common trunk. 
This smaller rachis on the right is, like the first named, only a frag- 
ment. It has attached to it, on both sides, a number of ultimate pinne, 
carrying pinnules similar to those figured by Emmons, but somewhat 
smaller. There are also several ultimate pinne so placed as to indicate 
that they were attached to it lower down. It will-be seen from this 
description that the fern must have had a wide spread and that it was 
much larger than is indicated by Emmons’s figure. Emmons’s figure of 
the principal rachis makes it too straight and rigid. It is really rather 
flexuous and shows ridges. The epidermis of the plant seems to be 
very durable, for it is now retained on the stone as a black, shining 
film. The pinnules are more obtuse than Emmons’s figure indicates. 
I have represented one of these enlarged in Pl. XX XVIII, Fig. 1. 
This plant is much like Agrostichites princeps (Presl) Schenk,‘ but as it 
shows no fructification it can not be stated that it is an Acrostichites. 
The habit of the pinnules is much like that of the pinnules of A. prin- 
ceps, which fact is not well shown in Emmons’s figure. This makes 
the plant too rigid in aspect. The pinnules, however, are on an average 
larger than those of Schenk’s plant, and if it is an Acrostichites it is 
almost a modified form or representative of A. princeps. But most 
probably it is a new species. The attitude of the two principal pinne 
indicates that they radiate from a common trunk, as Schenk represents 
in A. princeps. 
Genus LACCOPTERIS Presl. 
LaccopTrERIs LANCEOLATA (Gépp.) Pres] n. comb. ?” 
Pl. XXXVIII, Figs. 2-4. 
1836. Asterocarpus lanceolatus Gépp.: Syst. Fil. Foss., p. 382. 
1838. Laccopteris elegans Presl in Sternberg: Flora der Vorwelt, Vol. II, p. 115, pl. 
xxxii, figs. 8a (1, 2, 3), 8b, 8c. 
1857. Pecopteris sp.? Emm.: American Geology, Pt. VI, p. 104, pl. vi, fig. 2. 
1883. Undetermined fern (cf. Laccopteris elegans Presl) Font.: Older Mesozoic Flora 
of Virginia, Mon. U.S. Geol. Survey, p. 105, pl. li, fig. 6. 
Emmons’ notes a small fern which he leaves undescribed, but he says 
of it that it is probably a Pecopteris. Judging from the aspect of the 
1 Foss. Fl. der Grenzschichten des Keupers und Lias Frankens, pp. 46-49, pl. vii, figs. 3, 3a, 4, da, 5; 
pl. viii, figs. 1, la. : ; 
2G6ppert’s name Asterocarpus lanceolatus has priority over Presl’s by two years. He bases his descrip- 
tion on the same plate and figures, which Sternberg seems to have sent him, so that there is no ques- 
tion of identity. The specific name given hy Géppert must therefore stand. Although he credits it 
to Sternberg, there is no proof that Sternberg suggested it. It was probably a mere compliment, and 
it must be credited to Géppert, who first published it. L. F. W. 
2 American Geology, Pt. VI, p. 104, pl. vi, fig. 2. 
