ERIK A : SON STENSIO 
Fig. 20. Acrodus scaber n. sp., tooth (belonging to Prof. Dr. W. Salomon at Heidelberg) in lateral 
aspect. 2 / r 
» 21. Polyacrodus pyramidalis n. sp., tooth ( P. 717a). 2 / r 
» 22. » » » » » (P. 7 Ha). 2 / r 
» 23. » » » » » (P. 715a) ; a, in coronal aspect; b, in medial aspect; 
c, in lateral aspect. 3 / x . 
» 24. » » » » tooth (P. 716). 2 /j. 
» 25. » *• * » » (P- 7 ™ b )- 2 /r 
>>26. » » . »■» » (P. 7 i 5 a). 2 / r 
» 27. Polyacrodus angulatus » » » (belonging to Prof. Dr. W. Salomon at Heidelberg). 2 / r 
» 28. Palaeobates sp ., tooth (P. ^7). 2 / r 
» 29. » .» » (belonging to the Palaeontological Collection of the University of 
Christiania). 2 j 1 . 
« Plate 2. 
Figs. 1 —19. Acrodus spit^bergensis Hulke; teeth. Figures 1, 7—17 and 19 after specimens P. g8 a-m 
respectively, figures 2—6 after specimens P. gg a-e re¬ 
spectively and figure 18 after specimen P. 100. All the 
teeth are figured in coronal (a), medial (b), and lateral 
(c) aspects and with magnification %. 
» 20—21. Acrodus vermiformis n. sp, two teeth (P. g8n and P. ior respectively); a in coronal, 
b in medial and c in lateral aspect. Both figures with 
magnification 2 / x . 
Plate 3. 
Fig. 1. Acrodus oppenheimeri n. sp., tooth probably from the unpaired symphyseal transverse row 
(from specimen P. io 5 ); somewhat magnified. 
» 2. » » » » tooth probably from some of the most anterior transverse rows; 
in medial aspect. From specimen P. io 5 . i / s . 
» 3. » » » » same tooth as in the preceding figure in lateral aspect. 3 / 2 . 
» 4—5. » » » » teeth in shape intermediate between those of the anterior and 
middle transverse rows (from P. io5). i / 3 and 7 / 5 respectively. 
» 6. » » » » tooth from some of the middle transverse rows, in lateral 
aspect. (P. ro5). 4 / 3 . 
» 7. » » » » tooth from some of the posterior transversal rows (P. ro 5 ) 5 /4. 
» 8. » » » » tooth of the same type as that in figure 6; a, in coronal, b, 
in medial, and c in lateral aspect. Original belongs to the 
Royal State Museum at Stockholm. 4 / 3 . 
» 9. » » » » tooth of about the same type as that in the preceding figure 
in lateral aspect (P. io 5 ). 4 / 3 . 
» 10. » » » » two teeth, the right one of which is a transitional type between 
those of the middle and posterior transverse rows (P. io 5 ). 3 / 2 . 
» 11. » » » » Tooth from the most posterior transverse row (P. io 5 ). 5 / 2 . 
» 12. Palaeobates polaris n. sp., tooth probably from the unpaired symphyseal row (P. 107). 3 / 2 . 
» i3. » i> » » two teeth from rows b and c (cf. fig. 16) in coronal aspect 
(P. 107 ). 2 / r 
» 14. » » » » tooth from row b showing the relations between the real masti¬ 
catory and the lateral surfaces of the crown (P. 107). 2 / 1 . 
