Fig. 
FE; 
iS 
Fig. 
NATURAL SCIENCES OF PHILADELPHIA. 237 
7. Hemphillia glandulosa, Bl. and Binn. 
a. Central and first lateral teeth. 
6. Transition from lateral to marginal teeth. 
c. Marginal teeth near the edge of the membrane. 
d. Extreme marginal tooth. 
Prate VI. 
. A. Tebennophorus Caroliniensis, Bose. 
a. The central tooth. 
b. The first lateral. 
c. The last laterals. 
d. Marginal teeth. 
e. Hxtreme marginals. 
. B. Pallifera Wetherbyi. 
a. Central and lateral tooth. 
b. Extreme marginals. 
.C. Pallifera dorsalis, Binn. 
a. Central and two lateral teeth. 
5. Marginal tooth. 
ce. Hxtreme marginal. 
DP. Orthalicus undatus, Brug. The central and first, second, 
fifteenth, forty-eighth, and fiftieth marginals. 
‘Fig. 
Fig. 
E. Tetine fasciatus, Mull. 
a. A group of central and marginal ‘agli: 
b. Marginal far removed. 
ce. An extreme marginal. 
d. A marginal in profile. 
Pruate VII. 
ig. 1. Patula strigosa, Gld. 
a. Central and lateral teeth. 
6. Marginal teeth. 
c. Outer marginal tooth. 
d. An outer lateral on a different scale of enlargement. 
e. A central tooth from an embryonic specimen. 
2. Patula Cooperi, W. G. B. 
a. Central and lateral. 
6b. Outer marginals. 
g. 3. Patula perspectiva, Say. 
Fig. 
4, Patula Idahoensis, Newc. 
