CESTRACIONTIDiE. 
239 
(?) 1875. AijasaaijdM virt/Mumun, St. John & VV'oitheu, I’al. Illinois, 
vol. vi. p. 321, pi. Tiii. fig. 23. 
1833. Campudtts a//assizumus, M. Loliest, Ann. Soo. G6ol. 13elg. vol. xi. 
p. 305, pi. ilL figs. 1—3, pi. iv. figs. 1, 4-0. 
'I'ype. Associated teeth ; British Museum aud Paris School of 
Mines. 
Teeth with a few prominent large buttresses upon each long 
border, and all the crests ornamented with short transverse wrinkles. 
An elaborate description of the dentition is given by Lohest (/oc. 
cit.), who assigns Agnssizodus virginianus to this species. 
Form.^' Lioc. Lower Carboniferous (Ampelite): Belgium. (?)Uppcr 
Coal-Measures: West Virginia, U.S.A. 
28754. Portion of type specimen described and figured by L. G. do 
Koniuck, op.cit.; from the “Ampelite alunifere,” Chockier, 
near Liege. FureJutsed, 1853. 
The following species have also been founded upon teeth, but 
there aro no examples in the Collection : — 
Camjjodus con-ugaius : Orodus corrugatus, Newberry & Worthen, 
Pal. Illinois, vol. iv. (1870), p. 358, jJ. iii. fig. 18 : Agas- 
sizodus corrugatus, St. John & Worthen, Pal. Illinois, vol. vi. 
(1875), p. 323, pi. viii. fig. 24. — Lower Coal-Measures ; 
Illinois. Upper Coal-Measures ; Kansas. 
Vantpodus reclangulus: Arpagodus rectangalm, H. Trautschold, 
Nouv. Mem. Soc. Imp. Nat. Moscou, vol. xiv. (1879), p. 59, 
pi. vi. fig. 12. — Carboniferous Limestone ; Government of 
Moscow, llussia. 
Vampodus scitulus : Agassizodus scitulus, 8t. John & Worthen, 
op. cit. vol. vi. p. 322, pi. vi. figs. 10-18. — Lower Coal- 
Measures ; Illinois. Middle Coal-JIeasures ; Iowa. 
Campodus variabilis: Lophodus variahilis, Newberry & Worthen, 
op. cit. vol. iv. p. 301, pi. iv. figs. 4, 5, 11 : Agassizodus 
variabilis, St. John & Worthen, op. cit. vol. v'i. p. 318, 
pi. viii. figs. 1-22. — Upper Coal-ileasures ; Illinois, Iowa, 
and Kansas. 
Some Carboniferous Selachian teeth closely related to those of 
Orodus and Agassizodus have been described under the generic 
names of Mesodmodus (St. John & Worthen, Pal. Illinois, vol. vi. 
1875, p. 290) and Hybodopsis (\\. J. Barkas, Monthly Kev. Dental 
Surgery, vol. vii. 1878, p. 191). To the former are referred 
Mesodmodus explanutus, St. John & Worthen, tom. cit. p. 293, pi. v. 
