13. 
14. 
15. 
16. 
17. 
18. 
19. 
20. 
21. 
22. 
23. 
24, 
25. 
26. 
27. 
28. 
29. 
30. 
31. 
32. 
33. 
MWiscellanies. 175 
synonyms to this species. But, 
Lamarck gives the Mya radiata of 
Gmelin and U. ochraceus of Say as 
. these are perfectly distinct. The 
bite ens strait Ee fe: after Lam. is 
distinct from Say’s ochraceus, and 
there is no doubt but that the M. 
radiata, G. differs from both. 
Resembles the circulus of Ohio, but 
U. brevialis, Lam. i. larger, less round and radiated. 
(It is, no doubt, a distinct species. 
U. rhombula, Lam. 
U. carinifera, Lam. Varieties of the complanatus. 
U. georgina, Lam. 
lr clavas Lani: ane be identified with any of 
our shells. 
The same as Barnes’s prelongus. 
U. recta, Lam. Be recta being described first, 
should be retained. 
U. cylindricus of Say, and previ- 
U. naviformis, Lam. el described: the naviformis, 
therefore, cannot stand. 
(is Sab ae i lees of the cartosus most prob- 
oa lies the recta of Lam. or the 
. nasuta, Lam. 2 
gibbosus of Barnes. 
U. ovata, Lam. The ovatus of Say. 
U. rotundata, Lam. The circulus of Lea. 
U. littoralis, described by Draparnaud, who says it resembles 
the margaritifera, but is much smaller. 
U. semirugata, Lam. Cannot be identified. 
U. nana, Lam. Habitat is Franche Comté. 
Wig ela, Tam, aoe Say and Symphynota 
alata, of Lea. 
U. delodonta, Lam. Description too short. 
U. sulcidens, Lam. A variety of complanatus. 
The specimens sent Mr. Lea from 
U. rostrata, Lam. } Eno are only varieties of the 
prctorum. 
U. pictorum, Lam. Mya pictorum, Lin. 
U. batava, Lam. 
Europe, appear to be only varie- 
The specimens sent Mr. Lea from 
ties of the pictorum. 
