PETALODONTID^. 
37 
1873. Climaxodus, T. P. Barkas, Coal Meas. Palaeont. p. 20, pi. i. 
figs. 36-38. 
1875. Ja7Utssa lingiuaforimt, J. Ward, [Proc.] North Staffs. Nat. Field- 
Club, p. 222. fig. 8. 
1875. Janassa ovatus, W. J. Barkas, Monthly Rev. Dental Surgery, 
vol. iii. p. 153, figs. 49-54. 
1875. Janasf>a minutns, W. J. Barkas, tom. cit. p. 156, fig. 65. 
1876. Janassa proccstus, W. J. Barkas, tom. cit. p. 155, tig. 66. 
Type. Detached tooth ; Mns. Newcastle-on-Tyne. 
Margin of crown comparatively thin, but much reflexed in the 
principal teeth. Posterior coronal imbricated ridges few and rela- 
tively large in the principal teeth, sometimes absent in the lateral 
teeth. 
Form. ^ hoc. Coal-Measures : England, Scotland. 
41211. Tj’pe specimen of CZimaaToduA owf it* ; Newsham, Newcastle- 
on- Tyne. Presented by T. P. Barlcas, Esq., 1808. 
P. 3037. Tooth; Newsham. Enniskillen Coll. 
P. 1371-2. Three teeth; Newsham. Eyerton Coll. 
P. 5233. Tery large tooth ; near Dudley, S. Staffordshire. 
Purchased, 1880. 
P. 3036. One perfect dental crown detached from the matrix, and 
another embedded upon its anterior face ; also two frag- 
ments ; Carluke, Lanarkshire. Enniskillen Coll. 
P. 3006. Three teeth probably of this species ; Lowmoor, Yorkshire. 
Enniskillen Coll. 
P. 1418. Two similar teeth ; Lowmoor. Eyerton Coll. 
Janassa clavata (McCoy). 
1843. ChomatoJiis truncatus, L. Agassiz, Poiss. Foss. vol. iii. p. 174 
(name only). 
1855. Chomahjdiis daratus, F. McCoy, Brit. Palmoz. Foss. p. G17, 
pi. 3 K. fig. 10. 
1855. Chomatodus tnmcatm, F. McCoy, op. cit. p. 618, pi. 3i. fig. 1. 
1883. Petalorhynchus psittaeimis (in part), J. W. Davis, Trans. Roy. 
Dublin Soc. [2] voL i. p. 618. 
Type. Detached tooth. 
Teeth with extremely robust crowns. The basal coronal rugm 
arc few and insignificant, often entirely absent. 
Form. ^ Loc. Carboniferous Limestone : England, Scotland, Ire- 
land. 
