PETAL ODOXTIDJE. 
37 
1873. Climaxodus, T. P. Barkas, Coal Meas. Palaeont. p. 20, pi. i. 
figs. 35-38. 
1875. Janassa lingua for mis, J. Ward, [Proc.] Xorth Staffs. Xat. Field- 
Club, p. 222. fig. 8. 
1875. Janassa ovatus, W. J. Barkas, Monthly Key. Dental Surgery, 
yol. iii. p. 153, figs. 49-54. 
1875. Janassa minutus , W. J. Barkas, tom. cit. p. 155, fig. 55. 
1875. Janassa processus, M . J. Barkas, tom. cit. p. 155, fig. 56. 
Type. Detached tooth; Mus. Xewcastle-on-Tyne. 
Margin of crown comparatiyely 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. Sf Loc. Coal-Measures : England, Scotland. 
41211. Type specimen of Climaxodus ovatus ; Xewsham, Xewcastle- 
on-Tyne. Presented by T. P. Barkas , Es r p, 1863. 
P. 3037. Tooth; Xewsham. Enniskillen Coll. 
P. 1371-2. Three teeth; Xewsham. Egerton Coll. 
P. 5233. Very large tooth ; near Dudley, S. Staffordshire. 
Purchased, 1886. 
P. 3036. One perfect dental crown detached from the matrix, and 
another embedded upon its anterior face ; also two frag¬ 
ments ; Carluke, Lanarkshire. Enniskillen CoU. 
P.3006. Three teeth probably of this species; Lowmoor, Yorkshire. 
Enniskillen CoU. 
P. 1418. Two similar teeth ; Lowmoor. Egerton Coll. 
Janassa ciavata (McCoy). 
1843. Chomatodus truncatus, L. Agassiz, Poiss. Foss. yol. iii. p. 174 
(name only). 
1855. Chomatodus clavatus, F. McCoy, Brit. Palasoz. Foss. p. 617, 
pi. 3 x. fig. 10. 
1855. Chomatodus truncatus, F. McCoy, op. cit. p. 618, pi. 3i. fig. 1. 
1883. Petalorhynchus psittacinus (in part), J. W . Dayis, Trans. Boy. 
Dublin Soc. ~2 ] yol. i. p. 518. 
Type. Detached tooth. 
Teeth with extremely robust crowns. The basal coronal rugae 
are few and insignificant, often entirely absent. 
Form. Loc. Carboniferous Limestone : England, Scotland, Ire¬ 
land. 
