348 
CKOSSOPTERYGII. 
35663. Group of scales ; Burdiehouse. Bean Coll. 
36914. Scale, inner aspect, shown, of the natural size, in PI. XII. 
fig. 9 ; Burdieliouse. Purchased , 1863. 
P. 721. Three detached scales, and small group of three, all inner 
aspect; Burdiehouse. Egerton Coll. 
P. 3323. Group of scales, inner aspect; Burdiehouse. 
Enniskillen Coll. 
The teeth and portions of jaws in the Museum of Columbia 
College, Xew York, described under the following names, are 
probably all Labyrinthodont:— 
Rhizodus angustus , J. S. Xewberry, Proc. Acad. Xat. Sci. Philad. 
vol. viii. (1856), p. 99, and Pep. Geol. Surv. Ohio, vol. i. 
pt. ii. (1873), p. 342, pi. xxxix. fig. 6.—Coal-Measures; 
Linton, Ohio. 
Rhizodus incurvus, J. S. Xewberry, ibid. 1856, p. 99.—Coal- 
Measures ; Linton, Ohio. 
Rhizodus lancifer , J. S. Xewberry, ibid. 1856, p. 99, and ibid. 
1873, p. 342, pi. xxxix. fig. 9.—Coal-Measures; Linton, 
Ohio. [Very similar teeth from the Coal-Measures of 
Xorthumberland are also noticed (under the name of R. 
lanceiformis ) by Hancock and Atthey, Ann. Mag. Xat. Hist. 
[4] vol. i. (1868), p. 271. These are determined to 
be Pteroplax both by the last-mentioned authors and by 
J. Young, Bep. Brit. Assoc. 1869, Trans. Sect. p. 101.] 
Mioganoclus laniarius, B. Owen (Trans. Odontol. Soc. vol. v. 
1867, p. 357, pi. viii.), from the Coal-Measures of Xorthumberland, 
also sometimes referred to Rhizodus , is founded upon a micro¬ 
scopical section of a tooth, probably of the Labyrinthodont Loccommci. 
The type specimen is in the Collection. (P. 6244. Presented by 
Sir Richard Oiven, K.C.B. , 1890.) 
A scale of uncertain genus, but probably of Strepsodus , from the 
Coal-Measures of Illinois, is named Rhizodus occiclentalis, Xewberry 
& Worthen, Pal. Illinois, vol. ii. (1866), p. 19, woodc. fig. 2. 
ax<rf. /V f/P7o), /J- /V. p '/./, 
Genus STREPSOBUS, Young. 
[Quart. Journ. Geol. Soc. vol. xxii. 1866, p. 602.] 
Syn. Ben drop tych ius, J. Young (ex Huxley, MS.), Quart. Journ. Geol. 
Soc. vol. xxii. 1866, p. 601. 
