PLATE XXXII. 
PAGE 
Fig. 1. Carch ARIAS (Prioxodon) egertoni (Agassiz) 84 
1. Inner face uf a well-preserved spefimen of average size. C'barles County 
near the Tatuxent River. Acad. Nat. Soi., Phila. 
Fig. 2. Carcharias laevissimus (Cope) 84 
2. Inner face i^f a tooth. Fairhaven. 
Figs. 3-5. Carcharias collata n. sp. (Ex. Cope MS) 85 
3a. Outer face of a posterior tooth with expanded root. iType specimen.) 
Charles County near the Patuxent River. Acad. Nat. Sci., Phila. 
3b. Inner face of the same specimen. 
4a. Outer face of a large-sized tooth with erect crown and sharp lateral cariniie. 
(Type specimen.) Acad. Nat. Sci., Phila. 
4b. Inner face of the same specimen. 
o. Inner face of an average-sized tooth with prominent root. (Type speci- 
men.) Charles County near the Patuxent River. Acad. Nat. Sci., 
Phila. 
Figs. 6, 7. Carcharias magna (Cope) 86 
Ga. Outer face of a specimen with narrow root. Charles County near the 
Patuxent River. Acad. Nat. Sci., Phila. 
6b. Inner face of the same specimen. 
7a. Outer face of a large-sized lateral tooth with oblique crown and faint 
crimping of its basal edges. Charles County near the Patuxent River, 
Acad. Nat. Sci.. Phila. 
7b. Inner face of the same specimen. 
Fig. S. Carcharias ixcidexs n. sp 87 
S. Inner face of the type specimen. Chesapeake Beach. 
Figs. 9a, 9b. Galeocerdo contortus Gibbes 87 
Oa. Outer face of a specimen slightly above the average size. Fairbaven. 
Dlt. Inner face of the same specimen. 
Fig. 10. Galeocerdo latidexs Agassiz 88 
in. Inner face of an average-sized tnoth. Charles County near the Patuxent 
River. Acad. Nat. Sci., Pbiia. 
Fig. 11. Galeocerdo aduncus Agassiz 88 
11. Inner face of an averaged-sized tooth. Plum Point. 
Fig. 12. Galeocerdo triqueter n. sp 89 
I'J. Inner face of the type and only known specimen. Charles County near 
the I'atuxent River. Acad. Nat. Sci.. Pbila. 
Figs. 13, 14. Hemipristis serra Agassiz 90 
13a. Outer face of a medium-sized anterior tooth. Popes Creek. 
i;ib. Inner face of the same specimen. 
14a. Outer face of a moderate-sized lateral tooth. Popes Creek. 
14b. Profile of the same specimen. 
14c. Inner face of the same specimen. 
Fig. 15. Sphyrna prisca Agassiz 91 
IT). Inner face of a large-sized, perfectly preserved specimen. Plum Point. 
Fig. 16. Sphyr-ena speciosa Leidy 92 
IG. Crown of fragmentary laniary tooth. Charles County near the Patuxent 
River. Acad. Nat. Sci.. Phila. 
Figs. 17-19. Otolites of Teleost Fishes 93 
Inner, outer and side-views of otolites. St. Mary's River, x % 
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