228 THE CHICAGO ACADEMY OF SCIENCES. 
Acad., VI, p. 161, pl: 24, fig. 76, 1866; Obs., XI, p. 117, pl. 24, fig. 76, 1867—Scup- 
DER, Bull. Nat. Mus., 23, pp. 149, 201, 1885. 
Limnea smithsoniana Tryon, Con. Hald. Mon., p. 103 (77), pl. 18, fig. 2, 
1872. 
Limnophysa smithsoniana Tryon, Amer. Journ. Conch., I, p. 255, 1865. 
SHELL: Ovately-elongated, turreted, rather solid; color yellowish 
horn to brown, sometimes black; surface dull to shining; lines of 
growth very fine, crowded, irregular ; shell encircled by numerous equi- 
distant, heavily impressed spiral lines which give the shell a rather 
latticed or wavy appearance; these spiral lines appear at first to be 
elevated, this effect being caused by the epidermis standing erect in 
the otherwise impressed spiral lines; this epidermis may be scraped 
or brushed off, after which the surface resembles the other Lymnzeas 
with spiral lines; whorls 6-614, very convex; spire acutely conic, gen- 
erally longer than the aperture; nucleus consisting of one and a third 
whorls, in outline resembling the nucleus of Galba bulimoides techella 
(pl. XLIX, fig. C), sculpture of satin finish and color generally deep 
wine or brown; sutures very heavily impressed; aperture ovate, its 
terminations more or less rounded, frequently reddish or purplish 
within; peristome thin, sharp, thickened by an internal rib, which is . 
edged with dark purple; inner lip reflected over the umbilicus to form 
a wide, smooth, triangular expansion, without a columellar plait; pa- 
vietal callus very thin; axis thickened but not twisted; umbilical chink 
open, generally rather wide and deep. The surface of the shell is 
frequently marked by two, three or more rest periods, showing as 
heavy yellowish longitudinal bands; the spiral lines are so heavy that 
they may be plainly seen on the inner whorls of the shell when broken 
open. 
Length. Width. Aperture length. Width. 
12.00 500M ss 5.00 3.00 mill. Say’s specimen 
11.50 6.25 5.50 3.00 “ Type Smithsoniana 
11.00 5.50 4.50 3.00 “ Type ferrissi 
17.00 7.50 7.00 ALO0 en Lake Albert Lea 
15.75 7.50 6.50 3550) aan Des Moines, Iowa 
16.75 8.25 7.00 3900s rr ji 
13.75 7.00 6.50 Bday oe ;: 
13.50 6.50 5.80 300 e tan Joliet, Ill. 
13.75 6.75 6.25 sO es Moran, Iowa 
14.50 6.50 6.25 350, Emerson, Manitoba 
14.00 7.00 6.25 aN ae Boulder, Colo. 
13.00 7.00 6.00 3.00 4 is 
9.00 5.00 4.25 2:50) > Marsh Lake, Yukon Terr. 
13.10 6.50 6.00 3.10 “  N. Platte City, Neb. 
14.90 8.00 7.50 A000. % ik Fe 
2'50 6.00 5.50 2.90 “ Platte River 
5 
9.00 5.25 4.50 2.60 rs = 
