ie. eee oe ae ae 
le [174 J 
a magnifier.. This fossil is very similar to the Fucoides equa aidat Brong., 
(from the lower chalk,) except that the branches are longer and undivided. 
10. Tricnopreris Gractus. Pl. 1, fig. 5. (No. 84 of collection.) 
Description.—Slender, stems numerou s, flexueus, in a tuft, b 3 
branches numerous, slender, oblique, Serhinge than in the last species. 
is species is more robust than the first described, but evidently 
to the same genus. I had first supposed that this might be a collection of 
fern stems, stripped of their foliage; but their slender structure, long 
branches, and peculiar arrangement, with the appropriate proportion of all 
the parts, forbid its reference to any thing of this kind ; it is therefore placed 
in a new genus, 
11. Stems or rerns. PI. 1, fig. 7 
The stems of ferns, denuded of leaves, and portions only of the branches” ‘ 
remaining. Great numbers of these stems occur, mingled with fragments 
of leaves and other portions of ferns still perfect. 
12. Lear oF A DyYCoTYLEDONOUS PLANT. (?) Pl. 2, fig. 4. (Fr. Aug. 
_ 17, and No. 201 of collection. 
aes yn.—Leaf ovate- lanceolate, lobed, lobes acute, mucro 
hee distinct, dichotomous; principal divisions going to the ) el 
nate poi 
This leaf has the aspect of the leaf of a gap ght ag and a 
proaches remotely only to the character of species of the genu 
ris of Brongniart, which are regarded as such by Phillips, #7 by Lindley 
and Hutton. The e specimen was not observed soon enough to make a sat- 
isfactory comparison. 
ocality, in the neighborhood of the specimens saa i oe. 
fossils, and regarded by Captain Frémont as belonging to 
tion. The rock pee | them is a soft or very agte pe indurated lay ay 
verpagilike Bile haw! austih rittle mass containing the o coe § 2 
+ 
- = amt 4 : Prats Ud, 4. * 
: ee Pica ‘Fossil shells, &e. i : 
Figures 1, 2, 3,4, 5, 6, and 7, are from longitude 111°, latitude 40°. 
ee Sine se saniag some eo latitude 41 “s 
Figures 8, 9, and 1 from longitude it latitude r 3! edegee 
Figures 14 and 15, Lies from longitude 12 °, latitude 455°. a 
13. nha TELLINOIDES.* PI. 3, figs. 1 and 2. Compare unio peregri- 
nus; ted’ s Geol. Yorkshire, pl. 7, fig. 12. (Nos. 8, 325; and 32, of col- 
lection. 
Description Oran, potas side extended, sl fake g 
ide regularly rounded ; surf 
pete at 
mooth, or 
mated only by lines ‘of growth; beaks slightly Ww: hes nea Y secpesalle 
1 fig. 1 is an entire shell; fig. = Re of the two valves Z 
of'a stastict Socata, retaining a a small portion of the she * 
~ cimen, larger than either of these, presents the inside of both valet wi vil 
\ X"# The species, where no authority is given, are regarded as new, a 
\ * = ce x 
