WHITE. ] LARAMIE FOSSILS. 5T 
Genus ANOMIA Linneeus. 
ANOMIA GRYPHORHYNCHUS Meek. 
Plate 25, figs. 1, a, 6, and ec. 
Anomia? gryphorhynchus Meek, 1872, An. Rep. U. S. Geol. Sur. Terr. for 1871, p. 375 
Anomia (Placunopsis ?) gryphorhynchus Meek, 1873, An. Rep. U.S. Geol. Sur, Terr. for 
509. 
Cs 10e 
The follow ile is Mr. Meek’s description of this species, as given in 
the second place above cited : 
“Shell, for an Anomia, of medium size,thin and pearaceous s, a little 
obliquely subovate, or more or less orbicular in outline, usually somewhat 
narrowed towards the beak, and more broadly rounded at the opposite 
margin, often rather convex, ‘but variable in this respect; cardinal margin 
arcuate transversely, or very slightly truncated, scarcely thicker than 
other parts of the shell, and without any proper marginal cardinal facet. 
Upper valve (assuming it to be an Anomia), in the more ventricose in- 
dividuals, with umbo somewhat attenuated and curved, so as to present 
the appearance of the under valve of Gryphwa, except that the obtuse 
immediate apex is not quite marginal. Surface usually appearing smooth, 
but in well-preserved specimens, especially those most depressed in form, 
sometimes very faint traces of fine radiating striz, and thin, raised 
lamellz of growth may be seen. No scars of attachment observed on 
any of the specimens. 
‘* Length and breadth of an orbicular specimen, 0.83 inch; convexity 
of same, 0.33 inch; breadth of an oval specimen of the same length, 0.63 
inch; while there are all gradations between these extremes of form 
“In first describing this species Iwas unable to see any traces of mus- 
cular scars in any of the specimens then studied; but many of those 
since collected show them very clearly. They are precisely as in 
Anomia; that is, there are four impressions, one small one by the side 
of alittle submarginal cartilage pit, close up under the beak, and three 
others near the middle of the valve, the largest one of the latter being 
nearest the cardinal margin, and the two smaller ones just below the 
large one. ‘These three central scars are more or less nearly circular or 
oval, and usually distinct from each other, but sometimes in contact or 
nearly blended together. 
“Locality and position—Two miles below Point of Rocks (Union Pa- 
cific Railroad), Wyoming, Bitter Creek series.” 
This species occurs quite abundantly at the limited locality, where it 
was originally discovered; but I have also found it in Laramie strata 
holding a higher position in the Bitter Creek series, at Black Buttes Sta- 
tion, in Yampa Valley, near Cafion Park, and also in Crow Creek Valley, 
east of the Rocky Mountains, Northern Colorado. It is, however, a rare 
form, compared with the one next described, at all others than the first- 
named locality. Professor Powell also obtained a specimen, apparently 
of this species, from the cafion of Desolation, Green River, Utah. 
ANOMIA MICRONEMA Meek. 
Plate 25, figs. 2, a, b, c, and d. 
Anomia micronema Meck, 1875, Bull. U. 8. Geol. Sur. Terr., 2d Ser., No. 1, p. 43. 
The following is Mr. Meek’s original description of this species in the 
place above cited: ; 
“Shell of medium size, thin, orbicular, subovate, or somewhat irregu- 
