eo. > 
THE NATURAL HISTORY SURVEY. 281 
Distribution: Joliet, Illinois ( Ferriss); Saginaw River, Mich. 
(Walker). 
Habitat: Same as reflexa. 
Remarks: This variety was erroneously identified as aften- 
uwata Say ina paper on Limnza in the St. Louis Academy. Mr. 
Bryant Walker called the writer’s attention to this error and 
suggested its description as a new variety, characterized by an 
attenuated spire, rounded whorls and a general scalariform as- 
pect. It is fairly common at Joliet, but has not been found in 
any other part of the area. 
Jolietensis has a close resemblance to variety szrtlandiana, 
but in the former the whorls are more rounded, increase more 
rapidly in size and the last whorl is differently shaped. The 
varieties scalaris, kirtlandiana and jolietensis are very closely re- 
lated but seem to be easily distinguished. 
112b. Limnza reflexa walkeri Baker, pl. xxxi, fig. 2. 
Limnea reflexa var. scalaris BRYANT WALKER, The Nautilus, Vol. VI, 
p. 33, pl. i, fig. 7, 1892. 
Not scalaris VAN DEN BROECK (Ann. Soc. Mal. Belg., Vol. V, p. 
37, pl. ii, fig. 1, 1870, Vol. vii, p. 89, 1872), a variety of Limnea 
stagnalis. 
This form is intermediate between the typical veflexa and the 
variety jolietensis. It is in reality ascalariform condition, the 
whorls being well rounded and divided by a deep suture. The 
variety does not seem to bevery common, and is always found, 
at least in this area, associated with the type. It may be col- 
lected sparingly in Lake Calumet and near Joliet. 
Length, 37.00; width, 11.00; aperture length, 12.00; width, 6.00 mill. 
28.00; “ 9.00; sg oh 10.00; Cakes | ea 
_t12c. Limneza reflexa kirtlandiana Lea, pl. xxxi, fig. 4. 
Limnea kirtlandiana LEA, Proc. Amer. Phil. Soc., Vol. II, p. 33, 1841. 
“Shell: Turreted, thin, irregularly striate, pale horn color, 
imperforate; spire attenuated; sutures impressed; whorls six, 
slightly convex; aperture narrow-elliptical. Diameter, .26, 
length .7o of an inch.” (Lea.) 
A number of shells answering in a general way to Lea’s 
description were collected by the writer in Mud Lake, near 
Grand Crossing. They are small, none of them exceeding 
four-fifths of an inch in length. The whorls seem to be more 
rounded in some individuals than Lea’s figure (Binney, Fig. 
111) would indicate, but aside from this they agree very well. 
In some specimens the outer lip is thickened within by a heavy, 
