pe ' 
THE NATURAL HISTORY SURVEY. 283 
Among a lot of specimens from Calumet River, the indi- 
vidual which is here figured (Pl. 31, Fig. 3) was found. Itis the 
slenderest specimen of veflexa yet seen, the whorls (seven and 
one-half) are just a trifle convex, the sutures somewhat im- 
pressed, and the spire very attenuated. 
Length, 36.00; width, 9.50; aperture length, 14.00; width, 6.00 mill. 
113. Limnza stagnalis* appressa Say, pl. xxxiv, fig. 1. 
Limnea appressa SAY, Journ. Phil. Acad., Vol. II, p. 168, 1821. 
Limnea speciosa ZIEGLER Of ROSSMASSLER, Icon. und Siissw. Moll., 
pt. I, p. 96, pl. ii, fig. 50, 1835. 
Limnea jugularis SAY, Nich. Encycl., Amer. ed., 1816. (Variety.) 
Limne@a stagnalis var. occidentalis HEMPHILL, The Nautilus, Vol. IV, 
p. 26,1890. (Variety.) 
Limnea stagnalis var. sanctemari@ WALKER, |. c., Vol. VI, p. 31, pl. i, 
figs. 4,5, 1892. (Variety.) 
Shell: Elongated (or oval), ventricose at the anterior end, 
thin; color yellowish-horn to brownish-black; surface shining, 
growth lines numerous, crowded, more or less elevated, crossed 
by numerous fine, impressed spiral lines; apex smooth, brown- 
ish horn color; whorls six and one-half, rapidly increasing, all 
but the last two rather flat sided; last whorl very large, con- 
siderably dilated and inflated; spire long, pointed, acute, occu- 
pying about half the length of the entire shell (sometimes very 
short); sutures distinct, sometimes impressed; aperture large, 
broadly ovate, dilated, particularly at the upper part; peris- 
tome thin, acute, in some specimens thickened by an internal 
callus; lower part rounded; columella crossed in the middle by 
a very heavy plait, which starts from the base of the aperture 
and runs obliquely into the aperture of the shell about 10 mm. 
from the junction of the peristome with the body whorl; there 
is a spreading callus on the columella and labrum, which com- 
pletely covers the umbilicus. 
Leth., 48.00; width, 21.50; aperture lgth., 26.00; width, 14.00 mill. (8118.) 
pao 33 Dy 10 a aa ice rl | ay EA ered. LaODen = (8113.) 
SUES eS ie os PLO tga Tiere hs 50) same ea (8113.) 
Se OOH en OOO 2% eS Fr OOO S| i tlh ee LE OO (8113.) 
ee OO Mae 5 Ma ees ae iy UU es a Mac OU ) 54 (COL, [eEMSEn.) 
pF Mi) 700, VC gt tet /7:07 01 eka BL Uk es oo LADO 9 (12315.) 
*It seems hardly necessary, or worth the time expended, to name the numerous varie- 
ties of this species recognized by European writers, and yet it may be of some interest to 
tabulate the names of some of these varieties as recorded in the Annales de Ja Société Mala- 
cologique de Belgique, Vol. VII, 1872, p. 81, et seq. These are: sinistvosa, Jeff. (reversed), 
lutea, maxima, expansa, gquadrangulata, alba, erosa, regularis, distorta, aperta, biplicata, 
costulata, all of Collin; minima, gibbosa, illaqueata, aquarii, arenaria, froducta, all of J. 
Colb.; rosea Gass., subfusca, major, pumila, turgida, a\l of Mogq.-Jan., var, roseo-/abiata 
Wolf (Moq.), fragilis L. (Moq.), scalaris Broeck. This list sisi shows to what extent 
the system of varietal naming may be carried. ‘ 
