362 THE CHICAGO ACADEMY OF SCIENCES. 
Galba proxima rowellii (Tryon). Plate XXXVIII, figures 14- 
21. 
Limnea rowellii Tryon, Amer. Journ. Conch., I, p. 228, pl. 23, fig. 1, 1865; 
Con. Hald. Mon., p. 95 (69), pl. 17, fig. 1, 1872. 
Limnophysa rowellii Tryon, Amer. Journ. Conch., I, p. 250, 1865. 
Limnea palustris var. rowellii Woop, Nautilus, V, p. 56, 1891—KerEp, West 
Amer. Shells, p. 314, 1904. 
Limnophysa palustris var. rowelit Cooper, Zoe, I, p. 196, 1890. 
Lymnea palustris var. rowelli Dat, Alaska Moll. p. 76, fig. 56 g, 1905. 
Limnea umbrosa var. rowelli Cooper, Proc. Cal. Acad. Sci., IV, p. 96, 1870. 
Limnea proxima Sows., Conch. Icon., Lim., pl. 7, fig. 44 b, 1872. 
Limnea reflexa Tryon, Proc. Phil. Acad., 1863, p. 149. 
Linnophysa refiexa Keep, West Amer. Shells, p. 149, 1904. 
Limnea umbrosa Tryon, Proc. Phil. Acad., p. 149, 1863.~—Coorrer, Proc. 
Cal. Acad. Sci., IV, p. 96, 1870. 
Limnea umbrosa Gouin, U. S. Exp. Exped., p. 122, 1852 (?). 
Limnea palustris var. umbrosa Woop, Nautilus, V, p. 56, 1891.—KEEp, 
W. Amer. Sh., p. 314, 1904. 
Limnea palustris michiganensis WALKER, Nautilus, VI, p. 33, 1892 (part?). 
Lymne@a umbrosa Cooper, Pac. R. R., Rep., XII, pt. 2, p. 378, 1860. 
Lymnea proxima rowellii BAKER, Bull. State Lab. Nat. Hist., VIII, p. 493, 
1910. 
SHELL: Elongated, acute, rather thin; periostracum varying from. 
light yellowish horn to almost black; surface dull to shining; sculpture 
as in proxima; lines of growth conspicuous on the body whorl; whorls 
six to seven, flatly rounded, somewhat oblique, loosely coiled, the body 
whorl flatly rounded, compressed; spire acute, elongated, generally 
longer than the aperture; sutures well marked, sometimes heavily im- 
pressed; aperture very elongate-ovate, varying from narrow to wide 
and flaring ; peristome thin with a light chestnut-colored internal varix; 
inner lip narrow, erect, the parietal callus closely appressed and thin or 
very thick; there is a narrow umbilical chink in some specimens; colu- 
mella with a distinct, sometimes heavy, ascending plait; axis twisted as 
in palustris. 
Length. Width. Aperture length. Width. 
27.25 10.50 12.00 5.00 mill. Type. 
24.00 10.00 10.00 4.50 “ Sy 
24.50 10.00 10.50 5.00 “ San Francisco Co., Cal. 
22.50 9.00 10.00 4.50 “ San Francisco, Mt. Lake. 
29.00 12.00 15.50 ADO ee fe os 
32.00 14.00 15.50 $5075 oe aM 
Types: Academy of Natural Sciences, Philadelphia, three speci- 
mens, No. 58588. 
iThese references are believed to have been based on the different forms 
of rowellii, as the true umbrosa (=elodes) has not been seen from west of the 
Rocky Mountains. 
