936 QUADRULA 
the same species, will have to stand if my idea as to the identity 
of these forms is correct. The shell is shorter than Jeai, not 
narrowed in front and is not so inflated. This species and 
some of the others of this group approach some of the forms 
of the Unio japanensis, but on the whole they have heavier and 
ruder shells than that form has and the beak cavities are 
deeper. I therefore am inclined to believe that they are elon- 
gated Quadrulas. 
Var. cinnamomea (Gredler). 
Shell almost regularly elliptical or very slightly ovate; 
beaks not at all prominent; surface, except the anterior end, 
covered with fine, radiating somewhat broken corrugations, 
having a few pustules in front. 
Hunan, China: 
Unio leai var. cinnamomeus GREDLER, Jahrb. Deuts. Mal. Ges., 
VIIL, 1889, p. 122, pliavi, foie: ; 
Ouadrula cornuum-lune var. cinnamomeus SIMPSON, Syn., 
1900, p. 802. 
This form was made a variety of Jeai by Gredler, but I am 
inclined to believe it to be nearer cornuum-lune. Gredler does 
not give the dimensions. 
QuADRULA SCRIPTA (Heude). 
Shell irregularly long elliptical, inflated, solid, inequilateral ; 
beaks moderately full and elevated; posterior ridge well de- 
veloped, subangular above, ending in a point about on the 
median line; surface having strong, wide, uneven, concentric 
ridges, which are separated by narrow grooves, and on these 
ridges irregular knobs, tubercles and subradial ridges ; pseudo- 
cardinals somewhat triangular, split up radially ; laterals with 
faint, vertical striation; beak cavities somewhat deep. 
Length 73, height 51, diam. 39 mim. 
China. 
Unio scriptus Heupr, Conch. Fluv. Nank., I, 1875, pl. 11, figs. 
8, 8a. 
OQuadrula scripta Simpson, Syn., 1900, p. 802. 
