C 0 CELLIOD ON TIDiE. 
205 
Poecilodus cestriensis, St. John & Worthen, tom. cit. p. 135, 
pi. viii. figs. 15-17.—Chester Limestone ; Illinois. 
(?) Poecilodus paradoxus, W. Waagen, Pal. Ind. ser, 13, pt. i. 
(1879), p. 12, pi. i. fig. 1.—Productus Limestone; Salt 
Eange, India. 
Poecilodus rugosus , Newberry & Worthen, Pal. Illinois, vol. ii. 
(1866), p.94, pi. viii. fig. 13.—Keokuk Limestone; Illinois. 
Poecilodus sancti-luclovici , St. John & Worthen, tom. cit. p. 132, 
pi. viii. figs. 11, 12 (?figs. 8-10).—St. Louis Limestone; 
Missouri, Illinois, and Iowa. 
Poecilodus varsouviensis , St. John & AYorthen, tom. cit. p. 131, 
pi. viii. figs. 13, 14.—Warsaw Limestone ; Illinois. 
The so-called P. springeri (St. John & Worthen, tom. cit. p. 138, 
pi. viii. fig. 19), from the Lower Carboniferous Limestone of Santa 
Fe, New Mexico, and P. vortkeni (St. John, tom. cit. p. 136, pi. viii. 
fig. 18), from the Chester Limestone of Illinois, are founded upon 
teeth which would, in Europe, be regarded as referable to Delto- 
ptychius. 
The tooth from the Belgian Carboniferous Limestone named 
Poecilodus (?) elegans by L. G. de Koninck (Faune Calc. Carhf. 
Belg. pt. i. p. 59, pi. vi. fig. 17) is generically indeterminable. 
The Kussian Carboniferous teeth named P. lingulatus and P. sul- 
catus by H. Bomanowsky (Bull. Soc. Imp. Nat. Moscou, 1864, 
pt. ii. p. 164, pi. iv. figs. 28, 29) are extremely doubtful frag¬ 
ments, and may even pertain to Janassa. The same remark applies 
to P. convolutus , Newberry & Worthen (Pal. Illinois, vol. iv. 1870, 
p. 366, pi. ii. fig. 9), from the Keokuk Limestone of Illinois. 
Genus COCHLIOBUS, Agassiz. 
[Poiss. Foss. vol. iii. 1838, p. 113.] 
Two posterior series of teeth in the “ lower ” jaw represented by 
two separate dental plates, having the outer border much inrolled. 
Posterior dental plate elongated antero-posteriorly; postero-lateral 
and antero-lateral borders rapidly converging outwards, the second 
almost at right angles to the long axis of the supporting cartilage ; 
coronal contour raised by a median rounded ridge, extending from 
the outer to the inner border. Anterior dental plate very narrow, the 
hinder portion of the crown raised into a high, obtusely-angulated 
ridge, extending from the outer to the inner border. Coronal surface 
without transverse corrugations. Symphysial teeth small and feebly 
prehensile. 
