Catalogue Recently Described IMoeeusca 185 



Lampsieis venusta (Lea). 



Is a variety of L. ellipsiformis (Lea) according to Utterback (135, p. 

 343). 



Lampsieis vibex (Con.). 



Is a Micromya according to Ortmann (79, p. 340). 



Genio MICROMYA (Agassiz, 1852) Simpson. 



J\Iicro:mya ceeata Conrad. 



Unio propeccelatus De Gregorio, Moll, di aq. dul. di Amer., 1914, p. 30, pi. 

 YIII, figs. la-d. 

 This species has been identified by Frierson (42, p. 7) and Ortmann 

 {82, p. 39) as Unio (Leniiox) rimosus Raf. and the latter (1. c.) has raised 

 Lemio.v to generic rank. The identification seems too doubtful (Walker, 

 162, p. 4) to 'be reHed upon, the species should therefore retain Conrad's 

 name and a new generic name proposed. 



]\IlCROMYA FABAEIS (Say). 



Unio donacopsis De Gregorio, Moll, di dul. di Amer., 1914, p. 30, pi. X, 

 figs. 5a-b. 



Genus TRUNCILLA Rafinesque, 1819. 



Truncieea curtisii Frierson and Utterback. 



Truncilla curtisii Frierson and Utterback, Am. Mid. Nat., IV, 1916, p. 453, 



pi. VI, figs. I4a-d, pi. XXVIII, figs. 109A-D. 

 Type locality: White River, Hollister, Mo. 



This is the form that was collected by Ferriss in 1900 and distributed 

 by him as T. deviata (Anth.). It has also been found in Bear Creek, Frank- 

 lin Co., Ala., a tributary of the Tennessee. It does not seem to be more 

 than a light colored form of that species. 



Truncieea eeeevrei Utterback. 



Truncilla lefevrei Utterback, Am. Mid. Nat., IV, 1916, p. 455, pi. VI, figs. 



13 -d, pi. XXVIII, figs. 108A-D. 

 Type locality : Black River, Williamsville, Mo. 



Truncieea foeiata (Hild.). 



This species has been identified as Rafinesque's Obliquaria Uexiiosa by 

 Conrad and the specimen in the Poulson collection under that name is stated 

 by Vanatta (140, p. 550) to be this species. If identifiable from the orig- 

 inal description, Rafinesque's name would have priority. It has also been 

 identified by Frierson (42, p. 7) as Rafinesque's Bpioblasma biloba. 



