CORRIGENDA 



Bulletin 34, p. 71 {ioj), cut out Antigona (Ventricola) cal- 

 limorpha Dall as extralimital . Not } r et found in the Gulf of 

 Mexico (Dall, 1921). Remove pilula Dall from synonymy with 

 the above and refer to genus Vesicomya. Also extralimital. 



Bulletin 36, p. 6, (352) 2d line, change Volvula cyclindrica 

 to Volvula cylindrica. 



ADDENDA 



Bulletin 34, p. 26 (58). Under genus Unto add the follow- 

 ing species : musinus, atixus and sandri?ius 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. 



