CESTRACIONTIDJE. 
251 
1849. Hybodus plicatilis, H. von Meyer, Pakeontogr. vol. i. p. 224, 
pi. xxviii. figs. 35, 36, 40. 
1849. Hybodus mougeoti , H. von Meyer, tom. cit. p. 225, pi. xxviii. 
fig. 37. 
1849. Hybodus obliquus , H. von Meyer, tom. cit. p. 227, pi. xxviii. 
fig. 41. 
(P) 1849. Hybodus longiconus, H. von Meyer, tom. cit. p. 227, pi. xxviii. 
fig. 39. 
1852. Hybodus plicatilis , P. Gervais, Zool. et Pal. Pran^., Explic. PI., 
Poissons Foss. p. 12, pi. lxxvii. fig. 3 ( non figs. 1, 2, 4, 5). 
1856. Hybodus plicatilis , C. Giebel, Zeitsclir. gesammt. Naturw. vol. viii. 
p. 426, pi. i. fig. 6. 
1857. Hybodus plicatilis , 0. Chop, Zeitsclir. gesammt. Naturw. vol. ix. 
p. 128. 
1861. Hybodus plicatilis, E. E. Schmid, Nova Acta Acad. Cass. Leop.- 
Car. vol. xxix. no. 9, p. 18, pi. iii. figs. 7-12 ( non figs. 1-6). 
1865. Hybodus plicatilis, H. Eck, Form. hunt. Sandst. u. Muschelk. 
Obersclilesien, p. 65. 
1865. Hybodus longiconus, H. Eck, op. cit. p. 119 (in part). 
1870. Hybodus plicatilis, F. Foemer, Geol. von Obersclilesien, pi. xii. 
figs. 13, 14. 
1883. Hybodus plicatilis,. PI. E. Sauvage, Bull. Soc. Geol. France, [3] 
vol. xi. p. 495, pi. xii. figs. 6-11. 
Type. Detached teeth. 
Teeth small, with a relatively high crown, strongly marked by 
vertical superficial wrinkles. The lateral denticles are two, three, 
or four in number on each side, well separated, elongate, and 
slender. 
Detached teeth only being known, it is impossible at present to 
determine the precise characters of the dentition of this species. 
The teeth named H. longiconus, Agass., may almost certainly be 
referred to the sympl^sial portion of the jaw; and Sauvage {Joe. 
cit.) is inclined to think that H. angustus, Agass., is founded upon 
posterior teeth of this species. Schmid (Joe. cit.) also proposes to 
include Agassiz’s H. mougeoti , II. angustus, H. polycyphus, II. obli¬ 
quus , H. cuspidatus, H. sublcevis, and H. cipicahs. AVithout a larger 
number of specimens, however, it does not appear justifiable to 
exteud the synonymy beyond that given above. 
Form. <Sf Loc. Muschelkalk : Bpper Silesia, Bavaria, Wiirtemberg, 
Brunswick, Thuringia, Saxe-AVeimar, Lorraine, and Eastern France. 
28464. Small posterior tooth; Bayreuth, Bavaria. Purchased , 1853. 
1533. Similar tooth ; Bayreuth. Braun Coll. 
P. 2769, P. 2775. Two typical teeth, and one resembling H. longi¬ 
conus, Agass.; Bayreuth. Enniskillen Coll. 
