ON THE CLASSIFICATION OF THE LABYRINTHODONTS. 191 
ture. This is the most Lacertilian of the Carboniferous genera, and might almost 
be suspected to be a reptile were it not for the ventral armature, which is precisely 
that of Oéstocephalus and other genera. It appears to lack the thoracic shields of 
those genera.” 
8. LonGIPEs, Cope, 
8. prerrata, Cope. 
Locality. Coal-Measures, Linton, Columbiana County, Ohio. 
References, Cope, Proc. Acad. Nat. Sci. Philadelphia, 1868, p. 215,— Id. Synopsis, 
p. 15.—Jd. Supplement, p. 9. 
Sclerocephalus, Goldf. 
The single imperfect skull known seems to belong to Archegosaurus, and is not 
improbably identical with A. latirostris, 
S. Hausert, Goldf. 
Locality. Coal-measures of Heimkirchen, north of Kaiserslautern, Bavaria. 
References. Goldfuss, Jahrbuch fiir Mineralogie, &c. 1847, p, 403.—Beitriige zur 
vorweltlichen Fauna des Steinkohlengebirges, p. 13, t. iv. figs. 1-3 [1847]. 
—Von Meyer, Jahrbuch fiir Mineralogie, &c, 1848, p. 468.—J6, 1854, p. 431. 
—Reptilien, &c. p. 120, t. vii. tig. 9 [1858]. 
Strepsodontosaurus, Barkas. 
We do not gather either from the text or the figure any evidence of the Laby- 
rinthodont nature of this fossil. 
S. CARINATUS, Barkas, 
Locality. Low-Main Coal-Shale, Northumberland. 
References. Barkas, Coal-measure Paleontology, p. 107 [1873].—Atlas of Car- 
boniferous Fossils, t. x. fig. 237 [1873]. 
Tuditanus, Cope. 
“ Cranium broad, flat, orbits anterior, bones more or less sculptured. Teeth on 
premaxillary and maxillary bones of nearly equal sizes. Three pectoral shields 
sculptured externally. Form lizard-like ; two pairs of limbs of medium proportions.’ 
Ventral scutes unknown. 
T. punctuLatus, Cope; T. BREvirosTRIS, Cope; T. RapDIATUS, Cope; T. oB- 
Tusus, Cope (=Dendrerpeton obtusum, Cope) ; T. mMoRDAx, Cope ; T. Huxtey1, 
Cope. 
Locality. Coal-measures, Linton, Columbiana County, Ohio. 
References. Cope, Proc. American Phil. Soc. 1871, p. 177.—Zd. Supplement, 
p. 11. 
Xestorrhytias, Von Meyer. 
- The fragment of cranial bones from the posterior part of the skull figured in 
‘Saurier des Muschelkalkes’ has few distinctive features. The ridges which divide 
the pits and furrows are flat and smooth, and the pattern of sculpture is unusually 
large. The generic value of the fossil cannot be asserted. It is apparently nearly 
allied to Mastodonsaurus. 
X. PEerrint, Von Meyer. 
- Locality. Muschelkalk of Liineville. ‘ 
Reference. Von Meyer, Saurier des Muschelkalkes, p. 78, t. Lxii. fig. 5 [1847-55]. 
