464 THE CHICAGO ACADEMY OF SCIENCES. 
Morelet, which occurs in Siam and Cochin China. A mixing of labels 
may have led Lamarck to refer it to “the fresh waters of Virginia.” 
No specimens of American or European species have been seen at all 
comparable with it; it is of the type of shell occurring abundantly in 
Indo-China. 
Limnea vitrea Haldeman. 
Limnea vitrea Hatp., Mon. Lim. pt. 4, cover p. 3, 1841; p. 47, pl. 13, figs. 
14, 15, 1842-—DeKay, Zool. N. Y., p. 75, 1843. 
Limnea vitrea BINNEY, Check List, p. 12, 1860; L. & F.-W. Sh. N. A, 
II, p. 60, fig. 93, 1865—Sows., Conch. Icon., XVIII, Lim., pl. 14, fig. 94, 1872 
(poor figure).—Tryon, Con. Hald. Mon., p. 106 (80), 1872. 
Limnophysa vitrea Tryon, Amer. eee Conch., I, p. 255, 1865. 
Limneus vitreus Ktster, Conch. Cab., p. 50, taf. 11, figs. 11, 12, 13, 14, 1862. 
“Shell ovate, extremely thin and delicate; surafce smooth and 
polished ; lines of growth very fine; aperture ample; the labium pre- 
sents a well marked fold, and is not appressed anteriorly ; spire short. 
“Geographical Distribution: Ohio? Missouri? 
“Foreign analogue. L. tenuis, Bronn. 
“This species presents us with a shell which is probably thinner in 
texture than that of any other we have. For the specimens figured I 
am indebted to Mr. G. B. Emerson, president of the Boston Society 
of Natural History.” (Haldeman.) 
Haldeman’s types of this species are in the Philadelphia Academy 
(No. 59872, two specimens). Figure 15 of Haldeman’s original plate 
seems to be a form of columella. Figure 14 is a different form and 
may have been an introduced Indian species. Figure 15 measures as 
follows: 
Length, 12.00; breadth, 6.00; aperture length, 6.75; breadth, 3.50 
mill, 
The species is a composite one, judging from the types. It might 
possibly be included in columella in part. 
Lymneza Sp. 
Limnea desidiosa STERKI, An. Rep. Geol. Surv. Texas, III, p. 263, 1901. 
“About ten small specimens, for the most part damaged, of a 
slender form, distinctly umbilicated, with well rounded, somewhat 
shouldered whorls and deeply impressed suture, can hardly be ranged 
under any other species, although, even when mature, they certainly 
were of small size.” 
In the absence of the specimens, which have not been obtainable 
by the writer, it is impossible to ascertain which one of the southern 
forms of Lymnza this may have been. 
