32 BULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



12331. Akera glansoryza Whitfield. Holotype. 



Fort Pierre (Cret. )• Cheyenne River, near French Creek, 

 Black Hills, South Dakota. 



Whitfield, Rept. Geol. and Resources Black Hills, Dakota, 1880, 

 p. 437, pi. 12, fig. 25. 



1 13384. Alaba chipolana Dall. Holotype. 



Oligocene. Chipola River, Calhoun Count}-, Florida. 



Dall. Trans. Wagner Free Inst. Sci. Phila., Ill, Pt. II, 1892, p. 292, 

 pi. 21, fig. 9. 



1 07 1 28. Alaba turrita Guppy. Holotype. 



Oligocene. Vendryes, Jamaica, West Indies. 



Guppy, Proc. U. S. Nat. Mus., XIX, 1896, p. 321, pi. 27, fig. 7. 



1 58010. Aldrichia elegans Vaughan. Cotypes. 



Jacksonian (Eocene). Jackson, Mississippi. 



Vaughan, Mon. XXXIX, U. S. Geol. Surv., 1900, p. 71, pi. 4, 

 figs. 15, 16, 17a, 19. 



144173. Aligena aequata Conrad. Plesiotypes. 



Miocene. St. Marys River, Maryland. 



Dall, Trans. Wagner Free Inst. Sci. Phila., Ill, Pt. V, 1900, 

 p. 1175, pi. 24, figs. 8-8b. 



162529. Aligena cerritensis Arnold. Holotype. 



Pleistocene. Los Cerritos, California. 



Arnold, Mem. Calif. Acad. Sci., Ill, 1903, p. 138, pi. 13, fig. 3. 



135867. Aligena lineata Dall. Holotype. 



Oligocene. Oak Grove, Santa Rosa County, Florida. 



Dall, Trans. Wagner Free Inst. Sci. Phila., Ill, Pt. V, 1900, p. 

 1 176, pi. 44, fig. 23. 



115110. Aligena minor Dall. ' Holotype. 



Miocene. Natural Well, Duplin County, North Carolina. 



Dall, Trans. Wagner Free Inst. Sci. Phila., Ill, Pt. V, 1900, 

 p. 1 177, pi. 44, fig- 8. 



135868. Aligena pustulosa Dall. Holotype. 



Upper Oligocene. Oak Grove, Santa Rosa County, 

 Florida. 



Dall, Trans. Wagner Free Inst Sci. Phila., Ill, Pt. V, 1900, p. 1176, 

 pi. 33, figs. 18, 22. 



Allerisma. See Allorisma. 



4607S. Allodesma subellipticum (Ulrich). Holotype and plesio- 



type. 

 Trenton (Ord. ). Near Cannon Falls, Minnesota. 



Ulrich, Geol. and Nat. Hist. Surv. Minn., Final Rept., Ill, Pt. II, 

 1S94, p. 617, pi. 42, figs. 9-14. 



See Modiolopsis subelliptica. 



