158 
SELACHII. 
the lower jaw. Principal teeth of the upper jaw less laterally 
elongated, with fewer cusps than those of the lower jaw. Noto¬ 
chord persistent, except occasionally in the caudal region h 
Notidaxms ncmensteri 9 Agassiz. 
1843. Notidanus muensteri, L. Agassiz, Poiss. Foss. vol. iii. p. 222, 
pi. xxvii. figs. 2, 3. 
1849. Notidanus muensteri, Beyrich & Frischmann, Zeitschr. deutsch. 
geol. Ges. vol. i. p. 436, pi. vi. 
1852. Notidanus muensteri , F. A. Quenstedt, Handb. Petrefakt. p. 167, 
pi. xiii. fig. 4. 
1858. Notidanus muensteri, F. A. Quenstedt, Der Jura, p. 783, pi. xcvi. 
figs. 33, 34. 
1861. Notidanus eximius, A. Wagner, Abh. k. bay. Akad. Wiss. cl. ix. 
vol. ix. p. 292, pi. iv. fig. 2. 
1875. Notidanus eximius, K. Fricke, Palseontogr. vol. xxii. p. 394, 
pi. xxi. fig. 22. 
1882. Notidanus ( Heptanchus ) eximius, C. Hasse, Natiirl. Syst. Elasm., 
Besond. Theil, p. 51, pi. vii. figs. 21-25. 
1886. Notidanus eximius, A. S. Woodward, Geol. Mag. [3] vol. iii. 
p. 209, pi. vi. figs. 3-5. 
1887. Notidanus muensteri, K. A.von Zittel,Handb. Palaeont.vol. iii. p.C6. 
Type. Detached tooth. 
A species attaining a maximum length of not less than 2-8 metres ; 
snout rounded and obtuse ; anal fin smaller than the dorsal, probably 
not at all opposite the latter. Vertebral column as in the existing 
subgenus Heptanchus (according to Hasse). Principal cone in the 
lateral teeth relatively large and broad, without anterior denticles, 
and followed by not more than three or four secondary cones. 
A nearly complete fish in the Munich Museum is made known by 
Beyrich and Frischmann and by Wagner ; but the supposed young 
individuals referred to by the latter do not belong to the family of 
Notidanidae (see Pristiurus). ^ 
Form, Loc. Oxfordian Bavaria and Switzerland. Corallian : 
Wiirtemberg and Hanover. Lower Kimmeridgian : Bavaria and 
Wurtemberg. N. c C. 
^2500, 35763, 35763 a. Three teeth, described and figured by the 
present writer, Joe. cit. p. 210, pi. vi. figs. 3-5 ; Corallian, 
Schnaitheim, Wiirtemberg. Purchased , 1848, 1860. 
22489-91, 357i>4. Seven imperfect teeth ; Schnaitheim. 
Purchased , 1848, 1860. 
1 A. Kolliker (Verb, phys.-med. Gesell. Wiirzburg, vol. x. 1860, p. 198, pi. ii. 
fig. 3) notes the presence of calcified caudal vertebrae in Heptanchus, feebly 
asterospondylic in structure. 
