A 
THE NAIADES OF MISSOURI 267 
the same host as that for Fusconaia ebena. Its breeding season 
is the same as that of A. grandis. 
Anodonta Danielsii Lea. 
(“‘Daniel’s Shell.’’) 
Pl. XXIV, Figs. 76 A and B. 
1858—Anodonta dantelsii Lea, Proc. Ac. N. Sci. Phila., III, p. 113; 
Jl. Ac. N. Sci. Phila., 1860, IV, p. 365, Pl. LXIII, fig. 190. 
1859—Anodonta texasensis Lea, Proc. Ac. N. Sci. Phila; p. 113; Jl. 
Ac. N. Sci. Phila. 1860, p. 366, Pl. LXIII, fig. 191. 
ANIMAL CHARACTERS:—Branchial opening wide, densely 
papilose, anal smooth, supra-anal small, far removed from anal by 
mantle connection; palpi large, united two-third of their length 
antero-dorsad; inner laminae of inner gills free from visceral sac. 
REPRODUCTIVE CHARACTERS:—Marsupia occupying outer 
gills, when charged pad-like, ventral edge blunt, greenish poster- 
iorly, rest rusty brown; glochidia not found so far. 
SHELL CHARACTERS. 
EXTERNAL STRUCTURES:—Shell  subelliptical, moderately 
large, subsolid; disk smooth; beaks rather low, sculptured with 
coarse double loops radiating from the beaks; epidermis dark 
horn with areas of green between the dark lines of growth. 
INTERNAL STRUCTURES:—No teeth; scars faint; umbonal 
cavity shallow; nacre pearly-blue to light salmon with bluish 
border. 
Sex Length Width Diameter Um.ra. Locality 
9 115 x 55 x 40mm—o.304—(Lost Creek, Amity, Mo:) 
o& 180 x 65 x 42 ’’ —o.290—(Tarkio R., Craig, Mo.) 
9 82 x 42 x 30’ —o.268—(Flat Cr., Sedalia, Mo.) 
©, 950 xX 30 2%, 17 "’ —o.280—( ” * 4nTO a, Dy) 
The last measurement is that of the smallest and youngest 
Danielsii that has been obtained. It is a beautiful grass-green 
shell with a single brown band running parallel with the growth 
lines. Its beak sculpture is the most distinct of any in the writer’s 
collection and is typically Anodontine. Its soft parts are tannish 
and the outer gills are plainly marsupial. 
MISCELLANEOUS REMARKS:—This species is a rather common 
creek form of grandis. It is especially characterized by a more 
elongated, compressed and smaller shell. As a rule its shell is 
also thicker and its epidermis takes on more of a greenish color 
