23 



resemble in form the U. teres, Raf. common in the 

 western rivers. I did not observe it in Alabama. 



Mr. Say, in his synonymy of the western species, 

 has given the siliquoideus as a synonyme of U. cariosus, 

 considering it a mere variety of that species, and 

 more strangely merges the radiatus in the same. We 

 have seen abundance of both the latter and cariosus, 

 in the Schuylkill and Delaware, but never any varie- 

 ties of either which could for one moment have led us 

 to confound the two species. Mr. Lea informs us 

 that a specimen of the siliquoideus in the Garden of 

 Plants at Paris, is labelled luteola of Lamarck; this 

 name we should have adopted if Ferussac had not 

 referred Lamarck's specimen of luteola to cariosus, of 

 Say, which we presume to be correct, as that distin- 

 guished naturalist is well acquainted with those 

 species which are common in the United States. 



In Bayou Teche there occurs a beautiful species 

 allied to this if it be not a variety; it is distinguished 

 by a darker epidermis, with distant and dark green 

 rays of nearly uniform size. We have not seen many 

 specimens, but a figure of it will be given when its 

 characters shall be determined and its affinity with 

 the siliquoideus clearly ascertained. 



