246 AMERICAN JOURNAL 



Conchologia Iconica. By Lovell Reeve. Parts 260, 261. 



Unio, plates 47 to. 54. November, 1866. 

 Sp. 254. Unio Hainesianus, Lea, may be that species, but 

 certainly does not come from "Little Arkansas." The correct 

 locality is Siam. 



Sp. 257. Unio leptodon, Rafinesque = U. velum, Say, and 

 U. tenuissimus, Lea. 



Sp. 258. Uuio se)7iiquadrata, Sowerby. This species, herein 

 first described, appears to be only the young state of U. Hainesi- 

 anus. It is undoubtedly only a young shell. 



Sp. 260. Unio Kousei, Lea. " Georgia, in America." This 

 figure does not represent ITousei, which inhabits Siam, and is 

 described in " Observations," VI., p. 11, t. 23, f. 3, and not in 

 vol. 2, p. 71, t. 22, f. 69, as quoted by Sowerby. The figure 

 looks like a Dipsas plicatus. 



Sp. 262. Unio crispisulcatus, is described by Benson ; Sow- 

 erby has the authority. " Lea MSS." 



Sp. 264. U. Oumingii is wrong in identification, locality and 

 reference. It is a Chinese species, described by Mr. Lea. Obs. 

 VII. p. 58, t. 35, f. 120. Mr. Sowerby's reference is VI., p. 

 9, t. 21, f. 1. " Uphanpec Creek, Ala." This is also a Dipsas 

 plicatus. 



Species 265. U. 3Iyersianus, Lea. The reference should be 

 p. 10, t. 22, f. 2, instead of p. 9, t. 21, f. 1, and the shell figured 

 is certainly American, and not Siamese. 



Species 266. U. complanatus is not an Unio, but a 3Iar- 

 garitana. Mr. Barnes' description is accessible to English 

 naturalists (Am. Jour. Science, 1817) and therefore there is no 

 excuse for quoting ^'■Barnes, Lea on Unio, &c." 



Sp. 267. U. marginatus, Lea, is Margaritana marginata. 

 Say. The authority quoted would be rather difiicult to consult, 

 because the description was never published by Lea. The 3Iga 

 rugulosa of Wood, quoted as a synonym, is a very different shell 

 belonging to the pustulose section of Unios. 



Sp. 258. U. Von Buscliea should be U. Vondem Buschiana. 



Sp. 277. U. percoarctatus, Lea, MS. Hab. — ? The lo- 

 cality is North Carolina. 



Sp. 278. M. Conradicus, Lea. The locality is Tennessee. 



Sp. 280. U. plicatus. The authority given is " Say, Ency- 

 clopedia Americana." The species is a JJipms 2)licatus from 

 China, and Mr. Sowerby has confounded it with Unio plicatus 

 Lesueur, described by Say in Nicholson's Encyclopj^edia. 



