8rAKIDJ3. 
531 
Genus TRIGONODON, Sismonda. 
[Hem. R. Accad. Sci. Torino (2) vol. x. 1849, p. 25.] 
A genus known only by the front teeth, which are trenchant like 
those of Sargus but much broader and perhaps only in one pair. 
Trigonodon oweni, Sismonda. 
1849. Trigonodon oweni, E. Sismonda, loc. cit. p. 25, pi. i. figs. 14-16. 
1858. Sargus sioni, M. Rouault, Comptes liendus, vol. xlvii. p. 100. 
1874. Scarus baltringensis, J. Probst, Wurtt. Jahresh. vol. xxx. p. 282 
.Cm part), pi. iii. figs. 10, 11 (non figs. 7-9). 
1875. Sargus sioni, II. E. Sauvage, Bull. Soc. G6ol. France [3] vol. iii. 
P- 632, pi. xxii. figs. 3, 4. 
18/9. Sargus sioni, F. Bassani, Atti Soc. Veneto-Trent. Sci. Nat. vol. vi. 
p. 49, pi. v. figs. 13, 14. 
882. Sargus sioni , H. E. Sauvage, Mdm. Soc. Sci. Nat. Saone-et-Loire, 
vol. iv. p. 63. 
1890. Scants oweni, F. Sacco, Bell. Soc. Geol. Ital. vol. ix. p. 296. 
1895. Sargus ( Trigonodon ) oweni, F. Bassani, Atti R. Accad. Sci. 
Napoli [2] vol. vii. no. 7, p. 6, fig. 3. . . 
1896. Sargus oweni, G. de Alessandri, Mem. R. Accad. Sci. Torino [2J 
vol. xlv. p. 289, pi. i. fig. 27. , . 
1897. Trigonodon tnoeni, G. de Alessandri, Mem. Soc. Ital. Sci. Nat. 
n - 3. vol. vi. no. 1, p. 25. 
r ype. Worn tooth. 
The type species, with a rather stout cutting-tooth, which is high 
111 front, becoming rapidly low behind, and not serrated or crimped 
on the trenchant border, but sometimes with slight vertical folds at 
the base of its inner face. 
Form. Loc. Miocene : Italy, Wiirtemberg, and Brittany. 
Pliocene : Tuscany. 
P- 9467. Tooth 0-017 in length, not much worn ; locality unknown. 
History unknown. 
P- 5525. Plaster casts of two teeth ; Pliocene, Tuscany. 
Presented by Prof. G. Capellini, 1888. 
Trigonodon serratus (Gervais). 
1852. Sargus ? serratus, P. Gervais, Zool. et Pal. Franf., Poiss. Foss. 
P- 2, pi. lxvii. tig. 7 (non fig. 8). 
1891. Trigonodon serratus, A. S. Woodward, Geol. Mag. [3] vol. viii. 
p. 109, pi. iii. fig. 6. 
Type. Anterior tooth. 
2m 2 
