71 
Unio plicatus, Say, peruvianus, Lam. 
' Poulsoni, Conrad, . 
sai *pileus, Lea, 
: » perovalis, Conrad, 
{ purpurascens, Lan. 
| coarctata, Lam. 
purpureus, Say, 4 Carinifera, Lam. 
— Lea, 
aurata, Raf. 
-pectorosus, Conrad, 
planus, Barnes, 
personatus, Say, subrotundus, Lea, 
» prasinus, Conrad, 
rugosus, Barnes, 
i quadrulus, Raf. < lacrymosus, Lea, 
asperrimus, Lea, 
U. latissima, Raf. 
Toews Lam. ; U. prelongus, . Barnes, 
rubellus, Conrad, : 
*“ © Raveneli, Conrad, 
treflexus, Raf. cornutus, _ Barnes, 
Mya radiata, Gmel. 
radiatus, Lam. virginiana, Lam. 
ridibundus, Say, ; 
retusus, Raf. bt Y ire THVINEItA 
stapes, Lea, 3 
‘stramineus, . Conrad, ess 
: subtentus, Say, 
stegarius, Raf. irroratus, Lea, 
- { pusilla, — Raf. 
striata, Raf. 
subrotundus, Raf. circulus, Lag, 
( orbiculatus, Fiildreth, 
: cuneata, Raf. 
‘ scalenius, Raf. ; patulus, Lea, 
* This species nearly approaches the sulcatus, of Lm, if it be 
not a variety of that shell. La observes, “it differs from” the 
latter “in being more elongated and in being destitute of a pur- 
ple nacre.” A specimen I found in Elk river, Alabama, has a 
deep purple nacre. 

