14 
ICHTHTOTOMI. 
Diplodus bohemicuS) Quensledt. 
1882. Diplodus bohemicus, F. A. Quenatbdt, llandb. Palseont. 3rd edit, 
p. 277, pi. xxi. figs. 35-37. 
Type. Detached, tooth. 
Adult teeth equalling those of D. lotus in size, and apparently 
only differing in the somewhat greater length and slenderness of the 
anterior median denticle. 
Form. ^ Loc. Lower Permian (Gaskohle) : Bohemia. 
47484. Two large teeth, almost perfect ; Kounovd, near Rakonitz. 
Purchased, 1876. 
P. 3033. Similar tooth ; Kounova. Ennislcillen Coll. 
47486. Two small teeth, probably of this species ; Nyfan, near 
Pilsen. Purchased, 1876. 
The following species have also been founded upon detached 
teeth, but there are no examples in the Collection : — 
Diplodus bieornis : Thrinacodus hicornis, J. S. Newberry, Ann. 
Rep. Gcol. Surv. Indiana, 1879, p. 344. — St. Louis Lime- 
stone ; Indiana. 
Diplodus duplicatus, Newberry & Worthen, Pal. Illinois, vol. ii. 
(1866), p. 61, pi. iv. flg. 3; Thrinacodus duplicate, St. 
John & Worthen, Pal. Illinois, vol. vi. (1875), p- 289. 
— Keokuk Limestone ; Illinois. 
Dip>lodus incurvns, Newberry & Worthen, tom. cit. p. 62, pi. iv. 
fig. 4; Thrinac.odus incurvus, St. John & Worthen, tom. 
cit. p. 289. — Keokuk Limestone ; Illinois. 
Diplodus levidens : Orthacanthus levidens, A. Fritsch, Sitzungsb. 
kiinigl. bohra. Ges. Wiss. 1879, p. 189 (undefined). ■ 
Lower Permian ; Kounova, Bohemia. 
Diplodus nanus: Thrinacodus nanus, St. John & Worthen, tom. 
cit. p. 289, pi. V. figs. 1, 2. — Kindorhook Limestone ; Iowa. 
Diplodus penetrans, J. W. Dawson, Acadian Geology, Suppl. Chap- 
ter, 1860, p. 50, fig. 42; also op. cit. 3rd edit. (1878), 
p. 211, woodc. fig. 57. — Coal-Measures ; Nova Seofia. 
Diplodus plicatus, A. Fritsch, he. cit. 1879, p. 189 (undefined).— 
Lower Permian ; Knezoves, Bohemia. 
Skulls of two species from the Permian of Texas, possessing 
teeth gonerically identical with those named Diplodus, have been 
described by Prof. E. D. Cope under the names of Vidymodus 
lexers and D. platypternus. The pterygo-quadrate cartilage 
articulates with the postorbital process of the cranium, and the 
