8 
10 G. Platilites, Raf. Small valve 
with an angular opening and internal cavity, 
hinge very long, often longer than the shell 
which is thus winged. 
11 G. Pleurinia, Raf. Differ from 
last by the great valve perforate, shell wing- 
ed also. 
12 G« Pachiloma, Raf. Inequilateral, 
with thick edges, hinge with a linear open- 
ing. 
13 StrophomeneSj Raf. Equilateral, hinge 
broad, great valve notched by a lunulate si- 
nus receiving a lunulate projection of the 
cmallpr vqIvp 
HI. Family ATREMOSIA. Shell ine- 
quivalve, valves entire, not perforated. 
14 G. Orbicula (Cuvier, Lamark.) Shell 
orbicular, one valve flat and one conical. 
15 G. St7'ophesia , Raf. Shell orbicular 
equilateral, beak curved in the great valve. 
16 G. Diclipsites Raf. Differs from last 
by hinge short and straight; no proeminent 
beak. 
17 G. Trunculites, Raf. SubequitaJ, 
valves convex, equilateral, nearly equal, 
binge short and truncate. 
IS G. Productus , [ Sowerby ,] Equilateral, 
winged, or rather auriculated, one valve con- 
vex, the other flat or convex, hinge linear. 
19 G. Styriasis , Raf. Differ from last by 
great valve, with a projecting cruciform ap- 
pendage on the beak. 
20 G. Goniclis, Raf. Shell longitudinal, 
great valve concave inside, with a longitudi- 
nal angle outside. 
21 G. JVJegarites , Raf. Shell longitudinal, 
equilateral suborbicular, valves nearly equal, 
both convex with concentric ridges, hinge 
like a linear horizontal fissure. 
Most of the species belong to the follow- 
ing Genera. 
Obovites— 6 sp. 
Gonotrema-— 15 sp. 
Platilites— 13 sp. 
Shophomenes— 16 sp. 
In a supplement of March 1821, 1 added 
2 JNT. G. 
22 G. Amblotrema, Raf. Differs from 
Gonotrema by the opening or perforation, 
being oval or oblong, and obtuse. 
23 G. Pleuranisis , Raf. Differ from Pla - 
tilites by having the shell inequilateral. 
The geological age of these shells appears 
the same as that of the oldest fossils, Mad- 
reporites, Turbinolites, Encrinites, &c. being 
found together and promiscuously in the 
same. strata, or in diluvial debris; but the 
different genera and species are not found 
together, sometimes they are wide apart, or 
very rare; tney are mostly silicified. 
II. SUPPLEMENT. 
Description of the TULOSITES, Raf. N. 
G. of fossil Encrinite — disc. 1821. 
Pedunculate. Head articulated to the 
stem by a round concave articulation, conical 
verrueose, monostome, or with only one ter- 
minal opening hexagone, and surrounded by 
a thick hexagone margin with six warts on 
it. 
This is a very striking genus, evidently of 
the tribe of Encrinites , but with a very dif- 
ferent structure and mouth. I have a unique 
species and specimen, which is from the 
geological region of the Encrinites and Pen- 
tremites , the knob hills of Kentucky, Ten- 
nessee, and Alabama. I value it very high. 
The name means Warty fossil. 
Tulosites conica. Conical, lower part 
convex, smooth, with a concave, round mar- 
ginated central pit; and a crenate margin, 
upper part with several rows of obtuse warts. 
Remarks— Pale brown, one ineh long, 
three fourths broad, the warts are a little ir- 
regular in position and size, some of them 
are a little umbilicated; the mouth is small 
with acute angles inside, and the sides con- 
vex. 
An account of the most rare shells, fossil remains, &c. of the cabinet of Prof. Rafi- 
nesque, is now printing, and will appear in November. 
They will all be disposed of along with those above noticed, if a suitable price is offeree 
for them. 
This small tract contains 30 new Genera, and 47 new Species.— Price 25 cents. 
William Sharpless, Printer, No. 2 Decatur street. 
