514 
Figure 
Figure 
A. 
7 
lat 
oa 
cm 
—_ 
THE CHICAGO ACADEMY OF SCIENCES. 
Galba obrussa (Say). C, central tooth; 1, 2, 7, lateral teeth; 9, 
transition tooth; 11, 13, first marginals; 15, 16, 21, typical mar- 
ginals. 
Galba cubensis (Prr.). C, central tooth; 1, 3, lateral teeth; 7, inter- 
mediate tooth; 9, 13, 21, 22, marginal teeth. 
PLATE VHL 
RADUL&, 
Galba umbilicata (ADAMS). C, central tooth; 1, first lateral tooth; 
3, third lateral; 5, intermediate tooth; 7, 8, 9, marginal teeth. 
Galba umbilicata (ApAMsS). Seventh tooth (marginal) in one mem- 
brane. 
Galba obrussa exigua (LEA). 1, 3, 6, lateral teeth; 7, intermediate 
tooth; 8, 9, true marginal teeth. 
Galba obrussa exigua (LEA). Variation in first marginal on different 
membranes. 
Acella haldemani ((DeEsH.) BINNEY). C, central tooth; 1, 2, 7, lat- 
eral teeth; 9, intermediate tooth; 10, 11, 16, marginal teeth. 
Galba palustris (MULLER). C, central tooth; 1, 2, lateral teeth; 10, 12, 
intermediate teeth; 14, 16, 17, 18, marginal teeth. 
Galba elodes jolietensis (BAKER). 1, lateral tooth; 9, 10, intermedi- 
ate teeth; 11, 13, 16, marginal teeth. 
Galba palustris (MUtiER). First lateral tooth, with a split or bifed 
ectocone. 
Galba palustris desidiosa (Say). 1, first lateral; 10, 11, intermediate 
teeth; 14, 19, marginal teeth. 
Galba bulimoides cockerelli (Pits. & Ferrr.). 8, 10, intermediate 
teeth; 411, first marginal tooth. 
PLATEAX, 
RADULE. 
Galba reflexa (Say). ‘C, central tooth; 1, first lateral tooth; 12, last 
lateral tooth; 14, transition tooth; 18, first marginal; 20, 21, 22, 
typical marginals. 
Galba danielsi (BAKER). C, central tooth; 1, 8, lateral teeth; 10-11, 
intermediate teeth; 12, 13, 25, marginal teeth. 
Galba danielsi (BAKER). Tenth tooth (intermediate) in one speci- 
men. 
Galba emarginata (Say). C, central tooth; 1, 10, first and tenth 
lateral teeth; 11, 12, intermediate teeth; 13, 15, marginal teeth. 
Galba emarginata (Say). Thirteenth tooth (marginal in one speci- 
men). 
Galba emarginata mighelsi (BINNEY). 1, first lateral tooth; 12, 13, 
transition teeth; 17, 22, marginal teeth. 
Galba emarginata angulata (Sows.). 11, 12, intermediate teeth; 13, 
marginal tooth. 
Galba catascopium (Say). C, central tooth; 1, first lateral; 10, 11, 13, 
transition teeth; 14, 15, 26, 27, marginal teeth. 
Galba caperata (Say). C, central tooth; 1, first lateral; 9, 10, 12, 
intermediate teeth; 14, 15, 24, 28, marginal teeth. 
