832 PROCEEDINGS OF THE NATIONAL MUSEUM. vouxxm. 



EXLANATION OF THE PLATES. 



Plate XXXIX. 



Fk;. I. ' 'odakid {J(Hjonki) chiquUa Dall; Lower California; U. S. Nat. Mus. No. 96563; 

 Ion. 10.2 mm.; p. 82.3. 



2. I h(icoi<lei< {Pa)'i'ilucina)cre)tell<i.l)ii\\; Florida; U. S. Nat. Muh. No. 60948; alt. 



6.5 mm.; p. 825. 



3. Thyasira tomeana Ball; Chile; V. H. Nat. Mw. No. 108907; alt. 14.7 mm.; 



p. 818. 



4. FhacoidcH {I'arvllihcina) upproximatiiK Dall; Ciulf of California; U. S. Nat. 



Mus. No. 96418; alt. 6.5 mm.; p. 828. 



5. Phacoides {Callucina) bermudenm DaW; Bermuda; U. S. Nat. Mus. No. 41339; 



Ion. 15.5 mm.; p. 825. 



6. ('odak'xt (Jagoniaf) portorlcaiid Dall; Porto Kico; U. S. Nat. Mus. No. 108959; 



Ion. 7.25 mm.; p. 822. 



7. Phacoides {Carilucina) Ihigualis Carpenter; (4ulf of California; U. S. Nat. 



Mus. No. 73687; alt. 12.5 mm.; p. 827. 



8. Divaricella perparvuhi DaU; At-apulco, Mexico; V. S. Nat. Mus. No. 120699; 



lat. 7.0 mm.; p. 829. 



9. Phacoides {Cuvilucina) lampnis D-dU; (iulf of California; U.S. Nat. Mus. No. 



41626; Ion. 17.5 mm.; p. 827. 



10. I'liacoides {Bellucina) amiantus Dall; Yucatan Strait; XT. S. Nat. Mus. No. 



64276; alt. 7.6 mm.; p. 826. 



11. Phacoide.f {Bellucina) cancellaris Fh[\ip\n; Lower California; U. S. Nat. Mus. 



No. 96440; Ion.- 5.3 mm.; p. 829. 



12. Thyasira excarata'DaM; Gulf of California; V. S. Nat. Mus. No. 107449; alt. 



21 mm. ; p. 818. 



13. Phacoides (Lucinisca) nuUallii Conrad, var. (■nitrifucjus Dall, young; Gulf of 



California; U. S. Nat. Mus. No. 108881; Ion. 7.0 mm.; p. 828. 



14. Phacoides {Pleurolucina) undatas Carpenter; Gulf of California; IT. S. Nat. 



Mus. No. 73685; alt. 10 mm.; p. 826. 



15. Thyasira excavata Dall; interior of valve represented by fig. 12, supra. 



Plate XL. 



Fk;. 1. A.iinopsis viridis BaW; Unalaska; U. S. Nat. Mus. No. 108925; Ion. 6.2 mm. 

 p. 819. 



2. ^ixinopsi.'< .^ericatus Carpenter; type specimen for comparison with fig. 1; 



Puget Sound; U. S. Nat. Mus. No. 5249; Ion. 4.0 mm.; p. 819. 



3. Lucina. pliemtx DaW and Simpson; Porto Rico; U. S. Nat. Mus. No. 103951; 



alt. 9.0 mm.; p. 823. 



4. Codakia {.lagonia) (jalapagana Dall; Galapagos Islands; U. S. Nat. IMiis. No. 



102454; Ion. 23 mm.; p. 823. 



5. Phacoides {Pariilucina) tenuisculpius Carpenter; Puget Sound; U. S. Nat. 



Mus. No. 108827; alt. 12 mm.; p. 828. 

 (). Codakia (Jagonia) mexicana Dall; Gulf of California; U. S. Nat. INIus. No. 

 101783; Ion. 23 mm.; p. 822. 



7. Phacoides [Here) richthofeni Gabb; young shell from Catalina Island, Cali- 



fornia; U. S. Nat. Mus. No. 108828; Ion. 14.5 mm.; p. 827. 



8. Thyasira Imccta Conrad (sp. ), viewe<l from above; .southeastern Alaska; U. S. 



Nat. Mus. No. 122556; Ion. 50 mm.; p. 817. 



9. Phacoides (Here) nchthofeni Galib, interior of the valve represented by fig. 7, 



showing excavation of lunule and muscular impressions. 



