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CONTINUATION 
OP A MONOGRAPH OP THE BIVALVE SHELLS OF THE RIVER OHIO 
AND OTHER RIVERS OF THE WESTERN STATES. 
BY PROF. C. S. RAFINESQUE. 
c Published at Brussels, September 1820.) 
Containing 46 Species, from No. 76, to No. 121. 
INCLUDING AN APPENDIX ON SOME 
BIVALVE SHELLS OF THE RIVERS OF HINDUSTAN, 
WITH A SUPPLEMENT ON THE 
FOSSIL BIVALVE SHELLS OF THE WESTERN STATES, 
AND THE TULOS1TES, 
•S new Genus of Fossils. 
liTEc.: 
PHILADELPHIA, OCTOBER, 1831. 
Hardly a -dozen species of North Ameri- 
can fluviatile bivalve shells, had been men- 
tioned by Bose, Lamark, Say, and Lesueur, 
before 1820, when I described, in a special 
and ample Monograph, 75 species of them! 
with 40 varieties, mostly discovered by my- 
self, in my travels of 1818 and 1819, and 
figured 28 of them. This labour was writ- 
ten at Lexington, in January 1820, and pub- 
lished in French, at Brussels, in September 
1820, - in the General Annals of Physical 
Sciences , by Bory and Drapiez, and also in 
a separate pamphlet. I stated then, that se- 
veral other species existed in the Western 
Waters, but described none but those I had 
before my eyes. I have, however, diligently 
collected these additional species, in my 
successive travels between 1820 and 1826, 
and have thus added, at least 40 species to 
the 75 already described; some of which, 
must also form peculiar Genera, or Sub-ge- 
nera, particularly the Lasmonos, which fills 
the gap in the variety of hinges. We have 
thus five different tribes of Bivalve shells. 
1. TJnio. Hinge, with a cardinal tooth and 
a lamellar tooth. 
2. Alasmodon. Hinge, with a cardinal 
tooth only. 
3. Lasmonos. Hinge, with a lamellar tooth 
*only. 
4. Anodonta. Hinge, without teeth. 
5. Cyclas. Hinge, with two lamellar teeth. 
My labour on this branch of conchology, 
of which I was the pioneer and first histo- 
rian, lias attracted a great deal of attention 
in Europe, and latterly, also, with us. I 
was repeatedly asked for the shells I had 
discovered and described; I disposed of some 
rare ones, for the Museum of my fricnd'Clif- 
ford, in Lexington, and for the Museum of 
Transylvania University. I furnished' seve- 
ral to^ my friends, Elliot, Collins, Gra- 
ham, Hart, &c. in America, and Ferusac, 
Bronguiart, Swainson, Sowerby, &c. in Eu- 
rope. Meantime, I have lately found that 
these fine shells have acquired a great value 
in Europe, and some have sold at very hiah 
prices in England, Germany, and France, 
while I have seldom derived any profit from 
them, but much trouble, expense, and even 
vexation, I am determined to dispose of 
none left me, but for sale; I have as yet 400 
specimens, or 60 species, of my Monograph 
in my cabinet, and all those described in this 
continuation, about 96 species in all, which 
I value from one to five dollars each; and 
even 5 species at ten dollars or more, being 
perhaps unique specimens. I offer them all 
for sale, and have begun to sell upwards of 
50 to Mr. Oh. A. Poulson, for his fine cabi- 
net in Philadelphia. 
Some of these shells are so very rare, 
that I have only met them once in 4000 miles 
of travels and explorations; others I have 
never seen, except; in collections, such are 
the Unio ridibundus , and the Alasmodon 
complanatum , lor instance. I shall describe 
here, only those which I have now before my 
eyes , and with tke names given them ten 
years ago, at their discovery; I have seen a 
few others, which I delay to describe, not 
having them now in my hands. Those who 
shall purchase these new shells, may have 
the pleasure to give splendid figures of them, 
if they like. 
Since 1820, several American Concholo- 
gists have attempted to notice, describe, or 
figure these shells; Barnes, in 1S23, Lea, 
Say, and Eaton, later still. They had a fine 
field before them, in elucidating them by 
good figures, and describing the new kinds; 
but led astray, by various motives, they 
have neglected to verify, or properly notice 
my previous labours, although they were 
known to them. Mr. Say is, above all, in- 
excusable. I had respectfully noticed, in 
1820, his previous labours; but he has ne- 
ver mentioned mine, and knows so little of 
the animals of these shells, as to have mis- 
taken their mouth for their tail, and their an- 
terior for the posterior part of the shells! 
If he had seen these animals alive, feed- 
ing, moving, and watched their habits as I 
have done repeatedly, he would not have fal- 
len into such a blunder. The mouth is 
always near the cardinal tooth, and the la- 
mellar tooth is to the right of it in the 
right valve, to the left in the left valve — 
Others pretend that my monograph is too 
intricate; it is the subject which is such; 
whenever many species belong to a tribe, 
many divisions and sections are needed to 
