ADDENDA et CORRIGENDA. 



Page loi, To the synonymy of Lampsilis lienosa add: 



Hurynia (Micromya) Hcnosa Oriwfann, Ann. Car. Mus., 

 VIJI, 1912, p. 340. 

 Page 180, Dele the last six lines. Thev will be found on page 



281. 

 Page 230, TJne 16 from top read calimatorunt. 

 Page 289, Ijnes t and 7 from the top, read grandensis. 

 Page 348, Line 11 from top read shcefferianiis. 

 Page 402, To synonymy of Alasmidonta add: 



Alasuwdon Swainson, Tr. on Mai. 1840, p. 382. 

 Page 573, To the synonymy of Unio batavus add : 



Unio steTenianus D.roitet, Unionidae Russ., 1881, p. 14; 

 Snpp. Un. Serbie, 1884, pis. i, ir. 

 Page 583, To Unio monceti add : 

 \?ir. ntbcr Germain. 



"Typical in form; shell of a magnificent, brilliant red; 

 nacre bright rose-salmon, very iridescent." (Germain.) 



Type locality, Entebe, Take Victoria-Nyanza. 

 Unio monceti var. rubra Gi^rmain, Bull. Mus. Hist. Nat., 

 1906, p. 306. 

 Page 630, To the synonymy of Unio jaycnsis add : 



Unio leonensis "B. H. Wright" Simtson, Pr. U. S. Nat. 

 Mus., XY, 1892, p. 419, pi. Lxii, figs. 3, 4. 

 Page 730, Dele last five lines and first eight lines on page 731. 



See p. 1 142. 

 Page 732, Dele line 4 from top. 

 Page 779, To synonymy of Plenrobema nux add: 



? Unio placidus Kuster, Conch. Cab., Unio, 1861, p. 262, pi. 



LXXXVIIT, fig. 2. 



Page 988, To the synonymy of Xodnlaria bonncandi add : 

 Unio bonncandi Hani.ky and Theobald, Conch. Tnd., 1876, 

 p. 22, pi. Exvi, figs. 5. 6. 



Page 1068, Fhysunio fricrsoni. While this work was going 

 through the press, Mr. L. S. Frierson called my attention 

 to what had been overlooked in compiling the Synopsis, 

 viz.. that the name of velaris for a Unio was used by Han- 

 ley in 1856. vSowerby's name for this species must, there- 

 fore, be changed and I propose that of fricrsoni in its 

 place. 



