230 AMERICAN MIDLAND NATURALIST. 
and Keyes! (1888). Other papers by Pratt? Tryon’, Call’, 
Shimek’, H. M. Smith? and Kelley”, etc., cast further light on 
limited areas. The latter and more recent catalogue of the 
naiades of Iowa, which was based on previous work as well as 
on original investigation, enumerates 66 “species” of Unionide * 
which Keyes includes in the following genera: ANODONTA, 
11; MARGARITANA, 7; UNIO, 48. A number of the enum- 
erated species have since been reduced to the synonymy of other 
forms, but we believe that the number of reported species will 
be increased upon a more thorough examination of the streams 
ofthe state. From a study of his localities, it is apparent that 
the work of Keyes was confined to the Mississippi, Iowa, Cedar, 
Des Moines, Raccoon, Missouri, Rock (Northwestern Iowa), 
and Shell Rock rivers, and to Okoboji and Spirit Lakes, and 
some of his statements as to the distribution of certain Uniones 
will have to be modified as the result of subsequent investi- 
gations 
To the following specialists we are indebted for literature, 1 
material, advice and help: Mr. Frank C. Baker ator o 4 
the Chicago Academy of Sciences; Dr. Paul Bartsch, of the f 
Division of Mollusks of the United States National Museum; f 
and to Dr. R. Ellsworth Call of the De Witt Clinton High 
School, New York City. To Mr. Hartness de W. Taylor, the 
ier is greatly indebted for valuable services add in 
t d. 
List of Species. 
FAMILY UNIONIDAE, FLEMING, 1828. 
GENUS LAMPSILIS RAFINESQUE, 1820. 
l. L. alatus (Say, 1816) Baker, 1898 3 
Occurs quite rarely in the Wapsipinicon and Turkey 
rivers. 
2. L. anodontoides (Lea, 1834) Baker, 1898. 
. ommon in the Wapsipinicon. 
S. Lb ellipsiformis (Conrad, 1836) Simpson, 1900. ; 
Volga river at Fayette; Wapsipinicon river at Ind-- 
pendence and various other localities. D re 
(4) m Essex Inst. XX: pp. 61-83. (1888). Pp 
(5) 0c. Dav. Acad. Sci. He pp. 165-167; ibid. 1878: pp. uen di 
(6) iur Jour. Co ach 168: 68-7 A 
(1) Bull Des M ri E pe 5-57. (1885). A ia 
5 (8) Conch. Exch. “1888: p. AL 
-~ .(9) Sci. Amer. aps ge Bull. U. S. Fish Com. 
: e 
