QUADRULA 931 
Type locality, either Lake Tai-hu or the King’s Canal, 
Province of Kiang-su, China. 
Unio leai var. truncatula NeuMAyr, Ergebnisse d. Reise Szech- 
eny Ostasien, II, 1898, p. 643, pl. 11, fig. 8. 
“This form belongs to what appears to be a widespread type 
in China characterized by its rather remarkable sculpture. 
To it belong Unio affinis Heude, scriptus Heude, leat Heude, 
montanus Heude, Jeleci Heude; the last two mentioned forms 
should, as it appears, be referred to the very variable Unio 
leai Gray as varieties and to this group, doubtless, belongs 
the form here described; but it differs from all of the other 
varieties by its small size, elongate form, straight basal margin 
and obliquely truncate, pointed posterior end; in spite of these 
clear differences, I believe that at present it should only be 
considered as a variety, but a sure decision can only be reached 
with more material. One, probably full grown, example only.” 
Var. ponderosa Dautzenberg and H. Fischer. 
“Form very thick, greatly inflated, very inequilateral, beaks 
terminal, with a strong carina extending from the beaks and 
bounding the posterior slope, which is ornamented with large, 
oblique, regularly spaced folds. Ventral margin curved and 
sharply bent upwards posteriorly ; the ligament appears to be 
constantly shorter than in typical leat. U. leleci Heude, 
(Conch. fluv. pl. 1v, fig. 12), appears to be a connecting link 
between the type and our var. ponderosa, while the shell fig- 
ured by -Heude, (pl. v, fig. 14), appears to us to be almost 
identical with typical Jeai.” (D. and H. F.). 
Unio (Quadrula) leat var. ponderosa DAuTZENBERG and H. 
Fiscuer, Jl. de Conch., LIII, 1905, p. 200. 
QUADRULA GOTTSCHEI (von Martens). 
“Shell oblong-elliptical, compressed, epidermis somewhat 
silky, brown (reddish-yellow in the young), shortly and rather 
narrowly rounded in front, expanded posteriorly and sculp- 
tured in the middle with wart-like tubercles, which become 
elongated and radially divergent towards the margin, obsoles- 
cent in the adults; posterior dorsal margin quite curved, the 
