458 THE AMERICAN MIDLAND NATURALIST 
1831—Lea, Isaac—Observations on the NarapEs. (Tr. Am. Phil. Soc., 
pp. 63-121; 1834, pp. 23-119). 
1838—Lea, Isaac;—Description of New Fresh-water and Land Shells. 
\ (Tr. Am. Phil. Soc., pp. 1-154; 1842, pp. 163-252). 
1852—Lea, Isaac—Description of New Species of the Family UNIONIDAR. 
(Tr. Am. Phil. Soc., pp. 252-294). 
1862—Lea, Isaac—Description of Ten UNronipar of United States. (Pr. 
Acad. Nat. Sci. Phila., pp. 168 and 169). 
1912—Lefevre, Geo. and Curtis, W. C.—Studies on the Reproduction and 
Artificial Propagation of Fresh-water Mussels. (U. S. B. F., 
XEON, Does, Nom756). 
1906—Lindahl, Josua—Orthography of the Names of the NatapbEs. (Jl. 
Cinn. N. Hist. Soc. XX, No. 5, pp. 235-243). 
1891— Marsh, W. A.—A Description of Two Species of Unio From Arkansas 
(U. Pilsbry and Pleasii) (Naut., V, pp. 1-2; 1892, VI, pp. 1-2: 
TELS, WAU jo bea yovle Mle 
1901—Marsh, W. A.—Description of a New Unio from Missouri. (P. mis- 
sourensis, n. sp.) (Naut., XV, pp. 74-75). 
1912—Meek, S. E., and H. Walton Clark—The Mussels of the Big Buffalo 
Fork of White River, Arkansas. (U.S. B. F., Doc. No. 759). 
1909—Ortmann, A. E.—The Breeding Season of UNIONIDAE in Pennsyl 
vania. (Naut., XXII, pp. 99-103). 
191ra—Ortmann, A. E.—The Anatomical Structure of Certain Exotic 
NataDEs Compared with that of the North American Forms. 
(Naut., XXIV, pp. 103-108, 114-120, 127-131). 
1911b—Ortmann, A. E——A Monography of the NaraprEs of Pennsylvania. 
(Mem. Car. Mus., IV, pp. 279-339).- 
1912b—Ortmann, A. E.—Notes upon the Families and Genera of the 
NAIADES. (Reprint An. Car. Mus., VIII, pp. 222-365). 
1891b—Pilsbry, H. A.—Critical Notes on Eastern Texas UNIONIDAE. (Naut., 
Vip. 74-77): 
1901—Pilsbry and Fox. On Alasmidonta marginata. (Naut. 15, pp. 16 and 
47). 
1906—Pilsbry and Ferriss—Mollusea of Ozarkian Fauna. (Pr. Acad. Nat. 
Sci. Phil., pp. 529-567). 
1878—Pratt, W. H.—The Shell Beds of the Vicinity of Davenport, Iowa. 
(Pr. Dav. Acad.,.pp. 156-162). 
1820-1831—-Rafinesque, C. S.—Monographie des Coquilles Bivalves 
Fluviatiles de la Riverie Ohio. (Ann. Gen. Sci. Phys. Brux., 
V, pp. 287-322). 
1829—Say, Thomas—Description of Some New Terrestrial and Fluviatile 
Shells of North America. (New Harm. Diss., II, pp. 229; et 
seq. ad interim, 1829-1831). 
1830—Say, Thomas—American Conchology; or Description of the Shells 
of North America. (New Harmony, Ind.). 
1906—Scammon, R. E.—The UNIONIDAE of Kansas. Part I. (Kan. Univer 
Sci. Bull., III, pp. 279=373.). 
