274 
SIKEN03DEI. 
Mus. Teyler, vol. v. (1880), p. 141, pi. ix. See K. A. von Zittel, 
Sitzungsb. k. bay. Akad., math.-phys. Cl. 1886, p. 259. 
Dental plates, said to be identical with those of the recent Cera- 
todus forsteri \ occur in the superficial Alluvial Deposits of Darling 
Downs, Queensland. One of these is noticed in ‘ Nature,’ vol. ix 
(1874), p. 293, under the name of C . palmeri , Krefft. The follow¬ 
ing is a cast of the same :— 
45888. Plaster cast of imperfect upper dental plate, having only 
three sharply compressed horns preserved; Alluvial Deposit, 
Darling Downs, Queensland. 
Presented by Dr. A. Gunther , 1872. 
The following species have also been founded upon detached 
dental plates, but there are no examples in the Collection :— 
Ceratodus arenaceus, F. A. Quenstedt, Handb. Petrefakt. 3rd edit. 
(1883), p. 296, pi. xxiv. fig. 3.—Upper Bunter ; Siildorf, 
near Magdeburg. [Tubingen University Museum.] 
/ Ceratodus concinnus, T. Plieninger, in Meyer & Plieninger’s Pal. 
ter- Wurttembergs (1844), p. 85, pi. xi. fig. 9.—Keuper; 
f 35 3 3CXJC *‘ •' Stuttgart. [Stuttgart Museum.] 
Ceratodus cornutus , F. A. Quenstedt, Handb. Petrefakt. 3rd. edit. 
. C. / < 73 . (1883), p. 297, pi. xxiii. fig. 39.—Upper Muschelkalk ; 
-:- A. ./ < 7 *^. Wilhelmsgliick. [Tubingen University Museum.] 
r tty, Ceratodus favosus, E. D.Cope, Proc. Amer. Phil. Soc. 1884, p. 28. 
i y* ^ y —Permian; Texas.N [E. D. Cope Collection, Philadelphia.] 
Ceratodus gypsatus , F. A. Quenstedt, Begleitw. geogn. Specialk 
griijrtt. Atlasbl. Hall (1880), p. 26 ; Handb. Petrefakt. 
^^“^Srd edit. (1883), p. 297, pi. xxiv. fig. 2.— Keuper; Wiir- 
__^temberg. [Tubingen University Museum.] 
0 ( Ceratodus margatus , F. A. Quenstedt, Begleitw. geogn. Specialk. 
Wurtt. Atlasbl. Hall (1880), p. 23; Handb. Petrefakt. 
^ 3rd edit. (1883), p. 297, pi. xxiv. fig. 1.—Keuper; Wiir- 
temberg. [Tubingen University Museum.] 
Ceratodus serratus, L. Agassiz, Poiss. Foss. vol. iii. (1838), p. 135, 
pi. xix. fig. 18.—Keuper; Aargau, Switzerland. [Identified 
with C. runcinatus by E. Beyrich, Zeitschr. deutsch. geol. 
Ges. vol. ii. (1850), p. 163.] 
Ceratodus silesiacus , F. A. Boemer, Geol. von Obersehlesien (1870), 
p. 184, pi. xv. figs. 6, 7.—Rhoetic (Breccia); Bissau, 
Silesia. [University of Breslau.] 
Ceratodus virapa , T. Oldham, Mem. Geol. Surv. India, vol. i. 
C\ 
1 C. W. Be Yis, Proc. Roy. Soc. Queensland, vol. i. (1S84), p. 40. 
