CESTRACIOXTIDiE. 
253 
28479. Three tooth-fragments, perhaps of this species ; Crailsheim, 
'WTirtemberg. Purchased , 1853. 
P.2179. Similar fragment; Crailsheim. Egerton Coll. 
Hybodus polycyphus, Agassiz. 
1843. Hybodus polycyphus, L. Agassiz, Poiss. Foss. vol. iii. p. 193, 
pi. xxiv. figs. 17, 18. 
1843. Hybodus longiconus, L. Agassiz, tom. cit. pi. xxiv. fig. 22. 
1844. Hybodus 7'ugosus, T. Plieninger in H. von Meyer & T. Plieninger’s 
Beitr. Pal. Wiirttembergs, pp. 56, 117, pi. xii. figs. 52, 59. 
1849. Hybodus mougeoti and H. plicatilis , H. von Meyer, Paleeonto°r. 
vol. i. p. 226, pi. xxviii. figs. 46-48. 
1852. Hybodus rugosus, F. A. Quenstedt, Handb. Petrefakt. p. 177, 
pi. xiii. fig. 29. 
1865. Hybodus polycyphus , H. Eck, Form. bunt. Sandst. u. Muschelk. 
Oberschlesien, p. 119. 
Type. Detached teeth. 
Teeth very thick and robust, with a moderately elevated crown. 
Coronal surface mostly smooth, with rugose markings extending 
downwards from the summit of the principal cone, and also from 
the summit of the stout lateral denticles. 
Form. <$,' Loc. Muschelkalk and Lettenkohl: E. France, Wiirtem- 
berg, Saxony, and Silesia, e * 
28476. Three broken teeth; Bone-bed, Crailsheim. 
Purchased , 1853. 
P. 2189. Imperfect tooth ; Crailsheim. Egerton Coll. 
P.2790. Similar specimen ; Crailsheim. Ennislcillen Coll 
28481. Tooth; Halle, Saxony. Purchased , 1853. 
Hybodus cuspidatus, Agassiz. 
1843. Hybodus cuspidatus , L. Agassiz, Poiss. Foss. vol. iii. p. 194, 
pi. xxii. a. figs. 5-7. 
1844. Hybodus cuspidatus, H. von Meyer & T. Plieninger, Beitr. Pal. 
Wiirttembergs, p. 113, pi. xii. figs. 57, 61, 62. 
1882. Hybodus robustus, F. A. Quenstedt, Handb. Petrefakt. 3rd edit, 
p. 277, pi. xxi. fig, 31. 
Type. Detached teeth. 
Teeth with a relatively high conical crow T n, strongly marked by 
vertical superficial wrinkles. Lateral denticles robust and conical. 
Form, df Loc. Upper Muschelkalk and Keuper : Wiirtemberg. 
28465. Imperfect tooth; Ludwigsburg. Purchased , 1853. 
19691. Tooth fragment; Wiirtemberg. Purchased, 1845. 
