1853.] 



267 



Supplementary Notes. 



TJ. cuneatns, Haf. Having examined several specimens of this shell, it is 

 found to be a form between U. paUUus and U. clav2is, and may be a distinct 

 species. 



TJ. fasrioliis^ Raf. Mr. Poulson's specimen labelled by Rafinesque, is not U. 

 mulliradiatits, but certainly TJ. suhangulatus. Lea. 



Z7. simplexy Lea. It is strange that Mr. Lea should compare this shell with 

 TI. Hydiatins, to w^hich it bears no resemblance, and at the same time overlook 

 U. Greeiiii, Con. His figure might almost answer for a copy of mine. 



77. triangularis, Raf. Mr. Poulson's cabinet contains no authentic specimen 

 of this species, which is one I have never identified. Pachostea, Cliffordiana 

 and lateralis are also uncertain species. Lamjpsilis rosea and pallida are pro- 

 bably varieties of TJ. ochracetcs. 



Table shoioing the geograpJiical range of the Families Unionid^, Muteladje and 

 Mycetopodid^, and some of the genera and sub-genera. 



Asia. 



Family TJnionidtz. 



Sub-genera. 

 Naia, Sicains. 

 Lanceolaria,* Con. 

 Monodontina, Con. 



Genera. 

 Barbala, Humph. 

 Hyriopsis,f Con. 

 Nodularia,J Con. 



Europe. 



Sub-ge?iera. 

 Mysca, Turton. 

 Potamida, Sicains. 



Africa. 



Family Mnteladce. 

 Mutela, Scoj)oli. 

 Iridella, Con. 

 Pleiodon, Con., Gray. 

 Calliscapha, Swains. 

 Sjiatha, Lea. 



Family TJnio7iidce. 



Sub-gentcs. 

 Caelatura, Coji. 



Australia. 



Family TJnionidce. 

 Hyridella, Swains. 

 Parreysia, Con. 



U. m^dtidentatus , Parreyss. 

 Cucumaria,i| Con. 



North America. 



Fam,ily Tlnionidce. 



Snb-genera. 



Eurinea, Raf., Agas. 

 Lampsilis, Raf. Agas. 

 Canthyria, Swains. 

 Theliderma, Swains. 

 Cunicula, Swains, 



Genera. 

 Metaptera, Raf., Agas. 

 Strophitus, Raf. 

 Lastena, Raf. 



Complanaria, Stvains., Agas. 

 Alasmodonta, Say, Agas, 



South America. 



Fam,ily Micteladce. 



Genera. 

 Leila, Gray. 

 Paxyodon, Schum. 

 Prisodon, ib. 



Sub-genus. 

 Iridea, Swai?is. 



Family Mycetopodidce. 

 Mycetopus, D'Orb. 



Fam,ily JJnionidcE. 

 Genera. 

 Lamproscapha, Stvains. 

 Monocondylaea, D'Orb. 

 Byssodonta, ib. 



Sub-genus . 

 Corrugaria, Co7i. 



* U. Grayanus, Lea. f U Delphinus, Gruner. X U. Douglasiae, Gray. 



U. Egyptiacus. || U. cucnmoides, Lf:a. 



