ON THE CLASSIFICATION OF THE LABYRINTHODONTS. 153 
Miall, Q. J. Geol. Soc. vol. xxx. pp. 418, 43], &c., t. xxvi., xxvii. figs. 1, 2, 
4? [1874)}. 
M. FirstenserGanvs, Von Meyer. 
Differs from M. giganteus in its much smaller size, in the proportions and posi- 
tion of the palatine foramina, which are relatively larger and wider, as well as more 
posterior, and in the elongated choana. Von Meyer is disposed to refer it to Tre- 
matosaurus ; but the great breadth of the fore part of the palatine foramen, and the 
numerous inner series of vomerine teeth, disposed as in Mastodonsaurus, oppose this 
determination. The resemblance to Labyrinthodon (and in some points to Capito- 
saurus) is considerable. A cast only of part of the palate is known. 
Measurements. si 
From choana to anterior end of palatine foramen .......... (about) 2 
From tip of snout to anterior end of palatine foramen ...... (about) 4:5 
enpth of palatine foramen ........:sceescccsescceneste (about) 4:5 
Wan Gaof Palatine foramen) [. «.e:eilscloltore'e » oveleie + su hhaleelare (about) 1°75 
Least distance between palatine foramina...............eeee eee 375 
Locality. Vosges Sandstone (Bunter) of Herzogenweiler. 
References. Von Meyer, Jahrbuch fiir Mineralogie, 1847, p. 186.—Zd. Saurier des 
Muschelkalkes, p. 138, t. lxiv. fig. 16. 
M. VasLENnEnsIsS, Von Meyer. 
Interorbital space wider than transverse diameter of orbit. Skull about one half 
the size of MV. giganteus, but wider in proportion. Parietal foramen transversely 
oval, rather behind the centre of the parietal suture. Teeth unknown. 
Locality. Vosges Sandstone (Bunter) of Wasslenheim, Lower Rhine. 
References. Von Meyer, Jahrbuch fiir Mineralogie, 1847, p. 455.—Zd. Saurier des 
Muschelkalkes, p. 136, t. lix. figs. 6, 7, 8 (skull), and t. Ixiii. fig. 12 (thoracic 
plate ?). 
To the same genus are referable some or all of the following, which are imper- 
fectly known :— 
Xestorrhytias Perrini, Von Meyer, Muschelkalk of Liineville, and other Laby- 
rinthodont fossils from the same locality. (Saurier des Muschelkalkes, pp. 77, 78, 
t. Ixii. figs. 12, 13, 14.) 
M. Adriani, Miinst.; from the Keuper of Wiirtzburg. (Petref. i. 1839, p. 102, 
t, xili. fig. 8, and Saurier des Muschelkalkes, p. 151, t. Ixiv. fig. 4.) 
M. Meyeri, Miinst., Muschelkalk of Rothenburg. (Jahrbuch fiir Mineralogie, 
1834, p. 527; Saurier des Muschelkalkes, p. 93, t. xiv. fig. 5.) 
Odontosaurus Voltzii, Von Meyer, Bunter Sandstone of Sulzbad. (Mémoires de 
Strasbourg, p. 3, t. i. fig. 1; Saurier des Muschelkalkes, p. 136, t. Ixiii. fig. 10.) 
Also the remains from the Muschelkalk of Crailsheim (Saurier des Muschelkalkes, 
p. 91, t. Ixiii. figs. 7, 8, 9, 13); of Lésau, near Baireuth (7. p. 92, t. xiv. fig. 7) ; 
of Bibersfeld (2. p. 92, t. xiii. fig. 4); of Pfiffelbach (2d. p. 91, t. xii. fig. 17); and 
from the Lower Keuper of Golsdorf (Palaontologie Wiirttembergs, pp. 66, 72, 
t. xii. fig. 15). 
Capitosaurus, Minster. 
Skull (figure). Triangular, with broad and obtuse snout. Orbits. Small, oval, 
slightly convergent in front, situate far back, distant about twice the lateral dia- 
meter of one of them. Zzternal nasal foranmuna. Oval or roundish, convergent, 
distant. Palatine foramina, Large, closely approximated, expanded in front, pointed 
behind. Choane. Oval, marginal, about an inch behind and external to the external 
nasal foramina. Teeth (disposition). Premaxillary and maxillary, a nearly uniform 
series, diminishing in size behind ; palato-vomerine, large tusks adjacent to choana, 
numerous smaller teeth on palatal; mandibular, a regular and uniform series. In C, 
arenaceus there are indications of an inner row of one or two tusks close to the sym- 
physis; the mandibular and palatal series do not extend backwards so far as the 
maxillary row (in C. robustus). Teeth (structure). (C. robustus) Crown with small 
