32 BULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



12331. Akera glansoryza Whitfield. Holotype. 



Fort Pierre (Cret. ). Clieyenne 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 County, Florida. 



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

 pi. 21, fig. 9. 



107128. Alaba turrita Guppy. Holotype. 



Oligocene. Vendrj^es, 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. 



144 1 73. Aligena sequata Conrad. Plesiotypes. 



Miocene. St. Mar^^s River, Maryland. 



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

 p. 1 175, 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. 



1 151 10. 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, fiR- «• 



135868. Aligena pustulosa Dall. Holotype. 



Upper Oligocene. Oak Grove. Santa Rosa Cotinty, 

 Florida. 



Dall, Trans. Wagner Free Inst vSci. Phila., Ill, Pt. V, 1900, p. 11 76, 

 pi. 33, figs. 18, 22. 



Allerisma. See Allorisma. 



46078. 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, 

 1894, p. 617, pi. 42, figs. 9-14. 



See Modiolop.sis subelliptica. 



