330 THE CHICAGO ACADEMY OF SCIENCES. 
race which seems reasonably distinct from clodes and which is an 
abundant mollusk in certain localities. 
Galba elodes shurtlefi (Tryon). Plate XXXIV, figure 13. 
Limnea (Limnophysa) shurtlefi Tryon, Amer. Journ. Conch., II, p. 111, 
pl. 10, figs. 4, 5, 1866. 
Limnea shurtlefi Tryon, Con. Hald. Mon., p. 98 (72), pl. 17, figs. 7, 8, 
1872. 
Lymnea shurtlefi BAKER, Amer. Nat., XL, p. 331, et sq., fig. 4, 1906. 
SHELL: Ovate, cylindrical, robust; periostracum yellowish horn, 
surface shining, growth lines heavy, coarse, close-set, crossed by fine 
impressed spiral lines; whorls 5 to 6, flatly convex, the last subcylin- 
drical and considerably compressed or flattened on the sides; spire 
depressed, though more elevated in some specimens, acutely conical ; 
nuclear whorls brown, smooth, in outline like those of palustris; sutures 
impressed, bordered by a rather heavy white callus; aperture elongate- 
ovate, contracted, somewhat ear-shaped; outer lip thickened within and 
bordered by a purplish band; columella with a heavy callus, which is 
reflected so as to nearly cover the umbilicus, leaving a small chink; 
axis slightly twisted. 
Length. Width. Aperture length. Width. 
13.50 6.50 7.00 3.00 mill. (Tryon’s type, figured in 
this monograph. No. 
58160 Acad. Coll.) 
20.00 9.00 10.00 ADRs eo (Tryon’s fig. 7 in Hald.) 
19.50 8.50 10.00 4.50 “ (Part of type lot, Smith. 
Inst. 
Types: Academy of Natural Sciences, Philadelphia, two speci- 
mens, No. 58160. 
Type Locatity: Weatogue, Conn. 
ANIMAL, JAW, RADULA and GENITALIA: Unknown. 
RANGE (Figure 36): Connecticut. 
RECORDS. 
Weatogue, Hartford Co., Conn. (Shurtleff; Lea; Tryon). 
GEOLOGICAL RANGE: Unknown. 
EcoLtocy: In artificial pond. 
Remarks: Shurtleffiis a form of elodes in which the upper spire 
whorls are shortened and the body and aperture are compressed. The 
specimens in Philadelphia and Washington are wonderfully uniform. 
This Lymnza was found under rather peculiar circumstances, seeming 
to be a case of mutation, as outlined by de Vries, and the account given 
by Tryon and Shurtleff is not without interest, and is certainly very 
