2 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 63. 



Page 19. Chlamys fucicolus, strike out reference to the Sulphur voyage and 

 insert "Arnold, Tert, Pectens, Calif., p. 131, pi. 46, fig. 8, 1906." 



Page 23. It now appears that Muscnlus was used by Martyn binomially in its 

 ancient significance for Mytilus eleven years before Bolten, so we 

 happily can return to the familiar generic name Modiolaria for the 

 species of this group. 



Page 24. Crenella decussata, add " also Atlantic." 



Page 25. Cyathodonta pedroana, read " Dall, 1915." 



Page 30. Astarte globosa, read Reeve " vol. 2." 



Page 35. Lucinoma " densilineata," read " densilirata." 



Page 41. Pachydesma stuUorum, add " Halfmoon Bay, Weymouth." 

 Amiantis callosa, add " Santa Monica, Weymouth." 



Page 42. Saxidomus nuttalUi, add " Humboldt Bay, Weymouth." 



Chione fluctifraga and succincta, add " Mugu Bay, White." 



Page 49. Donax gouldii, add " San Luis Obispo, Weymouth." 

 Donax californica, add " Mugu Bay, White." 



Page 50. Sanguinolaria, add "Mugu Bay, White." 



Page 52. Hemimactra falcata, add " Newport, Calif." 



Page 54. Cyrtodaria kurriana, read " 1861." 



Page 55. Add "Rocellaria sp, San Diego, Calif., Orcutt." 



Page 56. Under Xylophaga add " Xylophaga californica Bartsch, 1921 ; Proc. 

 Biol. Soc. Washington, vol. 34, p. 32, ofE Point Pinos, Cal., in 78 to 

 108 fathoms. Also: Xylophaga washingtonia Bartsch. 1921, same 

 reference, Departure Bay, B. C, to coast of Washington. Also : 

 under Teredo, "Teredo beachi Bartsch, 1921, Proc. Biol. Soc. Wash., 

 vol. 34, p. 29 ; Bull. U. S. Nat. Mus. 122, p. 18, pi. 20, fig, 1, pi. 32, 

 fig. 4, 1922, San Francisco Bay." Add Teredo (Lyrodus) townsetidi 

 Bartsch, Bull. U. S. Nat. Mus. 122, p. 26, pi. 22, fig. 2; pi. 33, fig. 

 2, 1922, Southern San Francisco Bay. Also: to Teredo (Teredops) 

 diegensis add " Bull. U. S. Nat. Mus. 122, p. 29, pi. 22, fig. 3 ; pi. 34, 

 fig. 3, 1922." The true Teredo navalis of Europe is not a resident 

 of the Pacific Ocean. 



Page 59. Read Cymbuliidae. 



Page 60. Rictaxis punctocoelata, add " Departure Bay, B. C." 



Page 61. Acteocina cnlcitella, add " San Diego, Strong." 



Acteocina infrequens, fossil at Santa Monica, living Cape San Lucas 

 to Panama. 



Page 62. Above " Genus Diaphana " insert " Family Diaphanidae." 



Page 66. Liriola thersites, second line, read "Ann. Mag." 



Page 71. Antiplanes rotula, add " smithi Arnold, not Forbes." 



Page 76. Lora woodiana, for " strait " read " sea." 



Page 86. For " Merovia " read " CypraeoUna Cerulli-Irelli, 1911." 



Page 90. Beringius kennicottii, for " Dall, 1907," read " Dall, 1871." 



Page 96. Latisipho naflli, read " Latisipho halli." 



Page 103. Under Columbella, insert " Columbella fuscata Sowerby, 1832, Proc. 

 Zool. Soc, p. 117; Thes. Conch., Columbella, p. 114, pi. 36, figs. 21. 

 25. 1847. La Jolla, Calif. (Orcutt) to Ecuador." 



Page 111. Under Thais insert " Thais biserialis Blainville, 1832 ; Nouv. Ann. 

 du Mus. de Paris, p. 50, pi. 11, fig. 11, La .Tolla (Orcutt) to Peru." 

 Neptunea tenuisculpta, add " Bull. Am. Pal. VIII, No. 36, p. 5, pi. 

 1, fig. 6-9, 1921." 



Page 113. Pseudomurex costata read " p. 231." 



Paige 114. Opalia evicta, vol. 44, rend " vol. 64." 



