ArPKNDlX. 
2 
All the species, except two, herein described, are from SnowHilh Green- 
county. 
BIYALYES. 
ANOMIA. Lin, 
A. linifera, pi. 1, fig. i. Shell rounded,- convex, thin in substance, 
with numerous radiating irregular-acute lines minutely tubereulated 
This shell is extremely rare, while A. aryentea , Morton, is abundant. 
A. Untea. Shell having the larger ’-Valve, ventrieose. and scuptureti 
with reticulated lines, radiating lines alternated, waved. 
Locality: The Barm Cape Fear river 
RADI LA. h tern. Lima 
Tv. oxyjtieura, pi. I, tig. o'. Shell ovate, oblique, inflated , ribs 19, com 
pressed, acute; umbo inflated: anterior extremity angular and situated 
above the middle of the valves. — • 
Common in a particular part of the bed, which is exposed only to the 
depth of about 5 feet, but very rare in other places It is almost always 
pressed eutoHfs true shape, but otherwise the shell is in excellent preser- 
vation, though very friable. 
. ’ AMY v " Y. .. 
jTRKtCXN OARCA. C \ynrad 
This genus is very characteristic of the Ripley group of America and the 
Bondman'' of Southern India, where its development reaches its climax 1 r 
is a well defined genus, characterized by an exterior resemblance in form 
and 1 ' sculpture to Gucullvea, and in the marginal plate’ of the posterYv 
cicatrix, while it lias the oblique descending series of teeth, somewhat 
resembling those of There- is -no trace ot this- genus in the okh- 
Eocene and none apparently in the chalk. Thu, area: between the beaks in 
the American species is long anteriorly and very short ehind t . 
T, triquetra, \Ll. 1, fig 1 7. Shell triangular/ ineijiulateral, cmic.ilb;ii 
posteriorly ; umbonal slope • nearly straight, very oblique, angular; disk 
flattened anterior to the- umbonal slope : posterior slope profoundly de 
pressed interior radiately -striated. 
This species is rare and is the only one. T have seen without radiating 
lines on the disk. 
