164 
SELACIIII. 
1879. Notidanug renirvHs, J. Probst, Wiirtt. Jahresb. vol. xxxv. p. 162, 
pi. iii. lig.-5. 12-17. 
1879. Notidanug primigeniw>, J. Probst, tom. cit. p. 158, pi. iii. figs. 1-6. 
1879. Notidanm d’ancotue, J. Probst, to7ti. cit. p. 160, pi. iii. figs. 6-11. 
(?) 1880. Notidanus jnicrodon, V. Kiprijanolf, Bull. Soc. Imp. Nat. 
Moscou, pt. i. p. 0, pi. i. figs. 15, 10. 
1885. Notidantts primigenius, F. Noetling, Abb. Geol. Specialk. 
Preussen u. Tbiiriug. Staaten, vol. vi. pt. 3, p. 17, pi. i. figs. 4, 6. 
1880. Notidanus primigenius, A. S. Woodward, Geol. Mag. [3] vol. iii. 
p. 210, pi. vi. figs. 10, 20, 22 (? fig. 21). 
Tgpe. Botached teeth ; Munich Museum. 
The limits of this species arc at present unsatisfactoril}' defined. 
The teeth appear to pass, on the one hand, into those of N, serra- 
tissimus, from most of which they can only bo distinguished by their 
larger size ; and, on tlio other, they are indefinitely separated from 
the teeth of N. rjigas, the lateral mandibular examples of which are 
longer and gcnenill)' possess a greater number of secondary cones. 
The statement of Agassiz, repeated by the present writer, that the 
teeth of N, prlmigenius differ from those of N. sei't'alissinius in the 
more acute character of the cones, and the less uniform size of the 
anterior serrations, is shown to be inaccurate by a study of the 
variations in a larger scries of specimens ; though the features just 
mentioned are often distinctive. A specific character is also found 
in the lon er median tooth, which almost certainly has a well-defined 
median cusp. 
It is probable that the originals of Agassiz's figs. 4, 5 do not 
pertain to the same species as those of tigs. 0-8, 13-17, which are 
regarded as the typical teeth ; but N. recurvus may be referred, 
with much (wobability of correctness, to the upper jaw of N.primi- 
{jenitis. The localities of most of the type specimens are unknown, 
but they were probably' all obtained from the Molasse ; and it seems 
advisable at present to restrict the name to teeth from the Upper 
Eocene and Miocene, no undoubted specimens being knowm from the 
I’liocene. 
Form. ^ Loc. Upper Eocene : S. England and N. Germany. Lower 
Miocene : Belgium, llessen-Darmstadt, Wiirtomberg, and bwitzei- 
land '. 
P. 1224. Two fine teeth ; Upper Eocene, Barton Cliff, Hampshire. 
One is figured by the present writer, Iw. cit. pi. vi. tig- 22. 
Egerton Coll. 
P. 5802. Similar tooth ; Barton Cliff. Enniskillen Coll. 
' A very doubtful tooth from the Molasse of Montpellier, S. France, is also 
referred to N. primigenius by P. Gervais, Pal. GiSn, p. 230, tig- 30 (woode.). 
