CORRIGENDA 



Bulletin 34, ]). 71 {joj), cut out Antigona {^Ventricola) cal- 

 liinorpha Dall as extralitnital. Not }et found in the Gulf of 

 Mexico (Dall, 1921). ^&n\ov & pilula Dall from synonymy with 

 the above and refer to genus Vesicomya. Also extraliniital. 



Bulletin 36, p. 6, {jj2) 2d line, change Volvula cyclindrica 

 to l^olvula cy/iiidrica . 



ADDENDA 



Bulletin 34, p. 26 {3^). Under .i^enus Lhi/'o add the follow- 

 ing species : imcsinus, a/ixiis and sa//dn'///<s Dall, Proc. U. S. N. 

 Mus., 46, pp. 229-230, pi. 20, figs. 2, 4, 5, 6, 1914. Brackish 

 water Upper Miocene or Pliocene, well near Alexandria, Louis- 

 iana, about 48 feet below the surface. 



