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Show 1 7 6 OX LABYRIXTHODOXT SKULLS. [Ju n e 7, It may be added that vertebrae, ribs, and other fragmentary fossils from the Trias of Spitzbergen have already been referred to Labyrinthodonts * ; but the specimens described are scarcely sufficient for exact determination. E X P L AN A T IO N OF TH E PLATES. P l a t e X I . Capitosaurus stantonensis, sp. nov. (p. 170); from Lower Keuper, quarries of Messrs. Peter Ford and Sons, Stanton, near Uttoxeter. [Brit. Mus. no. R. 3174.] Fig. 1. Upper view of skull, two-thirds nat. size. 2. Occiput of the same, two-thirds nat. size. P l a t e X I I . Aphaneramma rostratum, gen. et sp. nov. (p. 173) ; from Trias, Sticky Keep, Spitzbergen. [Brit. Mus. nos. R. 3180-82.] Fig. 1. Upper view of imperfect hinder half of skull, internal mould, one-half nat. size. 2. Left side view of the same, one-half nat. size. 3. Hinder view of quadrate region of the same, one-half nat. size. 4. Ornament of part of cheek of the same, showing slime-canal, one-half nat. size. 5. Bases of teeth on maxilla and pterygoid of the same, nat. size. 6. Upper view of end of snout, internal mould, one-half nat. size. 7. Palatal view of the same, one-half nat. size. 8. 9. Imperfect vertebral centra, one-half nat. size. L e t t e e i n g :- au., opening for auditory meatus; bocc., supposed basioccipital; c., occipital condyle ; ep., epiotic; ex., exoccipital; fin., foramen magnum ; fir., frontal; j., jugal; la., lachrymal; mx., maxilla; na., nasal; op., opisthotic; orb., orbit; pa., parietal; pas., parasphenoid ; pin., pineal foramen ; pi., palatine; pmx., premaxilla; prfi, prefrontal; psq., prosquamosal; pt., pterygoid; ptf., postfrontal ; ptn., posterior nares ; pto., postorbital; ptv., postero-temporal vacuity; pv., premaxillary vacuity; qj., quadrato-jugal; qu., quadrate; socc., space for supraoccipital; sq., squamosal; st., supratemporal; v., vomer. * N. Yakowlew, " Neue Funde von Trias-Sauriern auf Spitzbergen," Verbandl. russ.-k. min. Ges. vol. xl. (1902), p. 180, pi. iii.; " Nachtrag," loc. cit. vol. xli. (1904), pp. 165-169. |