Fic. 
FIG. 
Fic. 
Fig. 
Fia. 
Fig. 
Fie. 
FIG. 
FIG. 
PLATE 18. 
[Illustrating species published by Dr. B. F. Shumard.] 
Thy JAGACOIP ENDS) Rhy Wri KO2 bl So ooosaaKose.coKd cuba cdooad Kdso dances noenoo ces a 
a. Side view. 
2. CIDARIS HEMIGRANOSUS ..--- pdoca osed coo BSBC nono EHeE cece dadaseod6 
a. Fragment showing body-plates and part of an ambulacral area. 
b. Another fragment. 
3. GERVILLIA GREGARIA.....-..-------- gHenbasacH sas Sas e/aror ate tuteriarerete ea ie 
a. Left valve. 
4. CYTHEREA LAMARENSIS..-.-...-- SECO er BeOS AIS oc PHS A 
a. Left side view. 
b. Dorsal view of the same. 
5 SN UCULA BELLASTRIATA A oe ae e Sale Me ta cls ei papa emer reer eee 
a. Right side view. 
b. Dorsal view of the same. 
ce. Dorsal] view of a natural cast of the interior of a large example. 
GEENU-C UGA HUANYaD BINT neater re a a tes 0 eee sinless Rise tee caer 
a. Right side view. 
b. Dorsal view of the same. 
7. CARDIUM CHOCTAWENSE ..........-..--- at ocdg esos oceo ce oocesd bones 
a. Side view. 
b. Front view of the same. 
c. Coste and concentric lines enlarged. 
SSISCAPHITES VER MICUIEUS Wee e een oases en nee eras Sisal PSE ate ae Pos Nd 
a. Side view. 
9. AMMONITES GRAYSONENSIS -....-- FEAL epee at ant uate mains aes tel AT i 
a. Side view. 
b. Peripheral view of the same. 
Fig. 10. ANCYLOCERAS ANNULATUM.........-.-----c- «< UG cam aeration Oy al aS 
a. Peripheral view of a fragment. 
b. Side view of the same. 
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