NO. nil. PROCEEDINGS OF THE NATIONAL MUSEUM. 379 



Plate XXXII. 



Fig. 1. Inside view of right valve of Vnio mitchelU, Simpson; 54 mm, long; i>. 371. 



2. Dorsal view of the same. 



3. External view of left valve. 



4. Anodonia dejecta, Lewis; dorsal view of specimen, In mm. long; p. .S72. 



5. The same, side view. 



6. BnUmuhis artemenia, W. G. Binney; alarge worn specimen, not showing spiral 



sculpture; 31 mm. long; \). 360. 



7. Pohi f/ II ra mearnsli, Dall; front view; 13 mm.; p. 343. 



8. The same from above. 



9. Fohjtjiira chiricahuana, Dall; front view, 18 mm.; p. 341. 



10. The same from above. 



11. PoJiioyra mrarnsii; basal view; p. 343. 



12. PoJyijyra chiricahiiana, Dall; basal view, p. 341. 



Plate XXXIII. 



Fig. 1. Coelocenirmn ])fefferi, Dall; 43 mm.; p. 352. 



2. Coelocentrum pfefferi, Dall; view of base, same enlargement; p. 352. 



3. Xassa mendica, Gould; slender southern form; No. 46634, U.S.N.M.; j). 377; 



compare fig. 9. 



4. Sfrej)tostyla nebulosa/Dsill; 22 mm.; p. 364. 



5. Coelocentrum nelsonl, Dall; 53 mm.; p. 352. 



6. Coelocentrum nelsoni, Dall; view of the base, same enlargement; p. 352. 



7. Anisospira streheli, Dall ; showing adult decollate shell, with the portion of 



the si>ire which is dropped; 29 and 21 mm. ; p. 353. 



8. Anisospira streheli, Dall; view of base, same enlargement; p. -353. 



9. Nassa mendica, Gould, var. cooperi Forbes, a strongly ribbed form; No. 46636, 



U.S.N.M.; p. 377. 



