ERRATA 



p. 21, line 20. For Pseudamuss'tum tigerinus read Pseudamuss'iutn tigerinum. 



p. 48, line 21. For Chaltnys (Pseudamussium) vitrea read Chlamys (Pseudamus- 

 sium) vitrea. 



p. 53, line 13 from bottom of page. For Chalmys (Palliolum?) groenlandica 

 read Chlamys (Palliolum?) groenlandica. 



p. 83, line 5. For {1 — Chlamys patagonicus King, 1831) read {} — Chlamys 

 patagonica King, 1831). 



VIll 



