ART. 19 A MIOCENE PORPOISE FEOM MARYLAND KELLOGG 55 



Plate 10 



Lateral views of posterior lumbar, anterior caudals, and chevron of Keri^ 

 triodon pernix. Cat. No. 8060, U.S.N.M. About natural size. Fig. 1, Last 

 lumbar, with right transverse process, neural arches, and neural spine restored ; 

 Fig. 2, First caudal, with extremity of neural spine restored; Fig. 3, Second 

 caudal, with neural arches and neural spine restored ; Fig. 4, Third caudal, no 

 restoration; Fig. 5, Anterior epiphysis of Fourth caudal; Fig. 6, Chevron of 

 an anterior caudal. 



Plate 11 



Dorsal views of posterior lumbars and anterior caudals of Kentrtodon pernix. 

 Cat. No. 8060, U.S.N.M. About three-fourths natural size. Fig. 1, Left trans- 

 verse process of next to last lumbar, with anteroexternal angle restored ; Fig. 2, 

 Last lumbar, with right transverse process, neural arches, neural spine, and an- 

 teroexternal angle of left transverse process, restored ; Fig. 3, First caudal, with 

 extremity of neural spine restored ; Fig. 4, Second caudal, with extremity of 

 right transverse process, neural arches, and neural spine restored ; Fig. 5, 

 Third caudal, no restoration ; Fig. 6, Lateral view of chevron of an anterior 

 caudal ; Fig. 7, Dorsal view of chevron of an anterior caudal ; Fig. 8, Dorsal 

 view of chevron of a posterior caudal ; Fig. 9, Anterior epiphysis of fourth 

 caudal. 



Plate 12 



Lateral views of caudal vertebrae of Kentriodon pernix. Cat. No. 8060, 

 U.S.N.M. About natural size. No restoration. Fig. 1, Sixth caudal ; Fig. 

 2, Seventh caudal. Atlas of Kentriodon pernix. Cat. No. 11400, U.S.N.M. 

 About nine-elevenths natural size. Fig. 3, Anterior view of atlas ; Fig. 4, Pos- 

 terior view of atlas. 



Plate 13 



Lateral views of caudal vertebrae and an anterior chevron of Kentriodon 

 pernix. Cat. No. 8060, U.S.N.M. About natural size. No restoration. Fig. 

 1, Eleventh caudal; Fig. 2, Twelfth caudal; Fig. 3, Thirteenth caudal; Fig. 

 4, Fourteenth caudal ; Fig. 5, Chevron of an anterior caudal. 



Plate 14 



Ventral view of vertebral column of Kentriodon pernix with associated ribs. 

 Cat. No. 8060, U.S.N.M. About one-half natural size. No restoration. 1, First 

 rib, left ; 2, Second rib, left ; 3, Third rib, left ; 4, Fourth rib, left ; 5, Fifth rib, 

 left ; 6, Sixth rib, left ; 7, Seventh rib, left ; 8, Eighth rib, left ; 9, Ninth rib, left ; 

 10, First rib, right; 11, Second rib, right; 12, Third rib, right; 13, Fourth r.b, 

 right ; 14, Fifth rib, right ; 15, Sixth rib, right ; 16, Seventh rib, right ; 17, Eighth 

 rib, right ; 18, Atlas ; 19, Axis ; 20, Left parapophysis, third cervical ; 21, Fourth 

 cervical ; 22, Fifth cervical ; 23, Sixth cervical ; 24, Seventh cervical ; 25, First 

 dorsal; 26, Second dorsal; 27, Third dorsal; 28, Fourth dorsal; 29, Fifth 

 dorsal; 30, Sixth dorsal; 31, Seventh dorsal; 32, Eighth dorsal; 33, Tenth 

 caudal; 34, Eleventh caudal; 35, Twelfth caudal; 36, Thirteenth caudal; 37, 

 Fourteenth caudal ; 38, Chevron of an anterior caudal. 



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