l8o BUSH 



16. Eudistylia abbreviates sp. nov. Yakutat to Sitka. 



17. Chone teres sp. nov. Unalaska Island. 



18. Myxicola conjuncta sp. nov. Prince William Sound. 



19. Myxicola glacialis sp. nov. Unalaska Island. 



20. Serpula splendens sp. nov. Prince William Sound. 



21. Crucigera formosa sp. nov. Unalaska Island to Wrangel. 



22. Crucigera irregular is sp. nov. Juneau. 



23. Hyalopomatopsis occidentals sp. nov. Prince William 



Sound. 



24. Spirorbis semidentatus sp. nov. Unalaska Island to 



Sitka. 



25. Spirorbis variabilis sp. nov. Sitka. 



26. Spirorbis mdrchi Levinsen. Prince William Sound to 



Sitka ; also North Atlantic. 



27. Spirorbis incongruus sp. nov. Prince William Sound. 



28. Spirorbis quadrangularis Stimpson. Prince William 



Sound ; also North Atlantic. 



29. Spirorbis lincatus sp. nov. Prince William Sound. 



30. Spirorbis similis sp. nov. Prince William Sound. 



31. Spirorbis violaceus Levinsen. Prince William Sound 



to Sitka ; also North Atlantic. 



32. Spirorbis spirillum Linne. Loc. ? to Santa Barbara, 



California ; also North Atlantic. 



33. Spirorbis rugatus sp. nov. Sitka. 



34. Spirorbis asperatus sp. nov. Prince William Sound to 



Pacific Grove, California. 



35. Spirorbis abnormis sp. nov. Sitka. 



Puget Sound Region : 



36. Eudistylia tenella sp. nov. Vancouver Island, British 



Columbia. 



California, Pacific Grove : 



37. Parasabella sp. 



38. Pseudopotamilla debilis sp. nov. 



39. Eudistylia intermedia sp. nov. 



40. Mctachone mollis sp. nov. 



41. Myxicola affinis sp. nov. 



42. Protula atypha sp. nov. 



43. Eupomatus gracilis sp. nov. 



44. Spirorbis eximius sp. nov. 



45. Spirorbis comptus sp. nov. 



Mexico: 



46. Eupomatus humilis sp. nov. 



