ant. 16, TWO SQUALODONTS FROM MARYLAND—KELLOGG. 69 
PuaTeE 10. 
Eleventh dorsal vertebra of Squalodon calveriensis, new species. About nine- 
sixteenths natural size. Fig. 1, anterior view; Fig. 2, superior view; Fig. 3 
posterior view. 
PuaTe 11. 
First lumbar vertebra of Squalodon calvertensis, new species. About five-ninths 
natural size. Fig. 1, anterior view; Fig. 2, posterior view. 
PuaTE 12. 
Second lumbar vertebra of Squalodon calvertensis, new species. About five-ninths 
natural size. Fig. 1, anterior view; Fig. 2, posterior view. 
PuaTE 13. 
Vertebrae of Squalodon calvertensis, new species. About five-ninths natural size. 
Fig. 1, superior view of first lumbar vertebra; Fig. 2, superior view of second 
lumbar vertebra; Figs. 3-4, epiphyses of vertebrae. Internal views. About 
natural size. 
PuaTE 14. 
Fies. 1-2. Epiphyses of vertebrae. Internal views. About natural size. 
PuaTeE 15. 
Fics. 1-2. Epiphyses of vertebrae. Internal views. About natural size. 
PuaTE 16. 
Ribs of Squalodon calvertensis, new species. About seven-twentieths natural size. 
Fig. 1, first rib, left side; Fig. 2, second rib, left side; Fig. 3, third rib, left 
side; Fig. 4, fifth rib, left side; Fig. 5, sixth rib, left side; Fig. 6, eleventh rib, 
left side; Fig. 7, sixth ? rib, right side; Fig. 8, fourth rib, right side; Figs. 9-10, 
posterior ribs, right side. 
PLATE 17. 
Figs. la, 1b. Molar tooth of Squalodon, species undetermined. About natural size. 
Fig. lc, fragment of jaw. About seven-ninths natural size. No. 
10694, Division of Vertebrate Paleontology, U.S. National Museum. 
Calvert formation, 1 mile south of Chesapeake Beach, Calvert County, 
Maryland. 
2a, 2b. Molar tooth of Squalodon, species undetermined. About natural size. 
No. 10726, Division of Vertebrate Paleontology, U.S. National Mu- 
seum. Chesapeake Beach, Calvert County, Maryland. 
PLatTe 18. 
Fras. la, 1b. Premolar tooth of Squalodon, species undetermined. About natural 
size. Fig. 2, fragment of right maxilla. About thirteen-twentieths 
natural size. Figs. 3a, 3b, fragment of left maxilla. About three- 
fifths natural size. No. 10695, Division of Vertebrate Paleontology, 
U.S. National Museum. Calvert formation, near South Chesapeake 
Beach, Calvert County, Maryland. 
PuateE 19, 
Figs. la, 1b. Fragment of left mandible of Squalodon, species undetermined. About 
two-thirds natural size. No. 10695, Division of Vertebrate Paleon- 
tology, U.S. National Museum. Calvert formation, near South Chesa- 
peake Beach, Calvert County, Maryland.. 
Puate 20. 
Fies. la, 1b. Left squamosal and adjoining exoccipital of Squalodon, species undeter- 
mined, About six-tenths natural size. No. 10695, Division of Ver- 
tebrate Paleontology, U. S. National Museum. Calvert formation, 
near South Chesapeake Beach, Calvert County, Maryland. 
