176 ON LABYRINXIIOUONT SKULLS. [JuUC 7, 



It may be added that vertebrae, ribs, and other fi-agmentary 

 fossils from the Trias of Spitzbergeu have already been referred 

 to Labyriuthoilonts * ; but the specimens described are scarcely 

 sulticieiit for exact determination. 



EXPLANATION OF THE TLATES. 



Plate XL 



CapUosaH7'vs sfaiifoneiisis, sp. iiov. (p. 170) ; from Lower Kcupcr, quarries of 

 Messrs. Peter Ford and Sous, Stanton, near Uttoxcter. [Brit. Mus. no. li. 3174-.] 



Fig. 1. Upper view of skull, two-thirds uat. size. 

 2. Occiput of the same, two-thirds nat. size. 



Plate XIL 



Apliaiicramma rostrattim, g-eu. et sp. nov. (p. 173) ; from Trias, Sticky Keep, 

 Spit/.bersicn. | Urit. Mus. nos. li. 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 rei;ion of the same, one-half nat. size. 



-1. Ornaiueut of part of cheek of the same, showinu,- slime-canal, one-half 



nat. size. 

 5. Pases of teeth on maxilla and pterygoid of the same, nat. size, 

 (i U]>per view of end of snout, internal mould, one-half nat. size. 

 7. Palatal view of the same, one-halt nat. size. 

 S, 0. Lnperfect vertebral centra, one-half nat. size. 



Lettering: — au., opening for auditory meatus ; hocc, supposed hasioceipital ; 

 r., occipital condyle; cp., epiotic ; ex., exocci]iital; fm., foramen magnum; fr., 

 iVontal; j., jugal; /<(., lachrymal; nuw, maxilhi; na., nasal; op., opisthotic ; 

 orb., orhit; pa., parietal; ptxs., par;isphenoid ; j;)('«., phieal foramen;^?., palatine; 

 ji^iH.r., preniaxilla ; pr_f\, prefrontal; imj., pros(|uamosal; j^*f., pterygoid ; jj^/"., post- 

 frontal ; ptn., posterior nares ; pto., ])ostorhital ; ptv., postero-temporal vacuity ; 

 ■yv., premaxillary vacuity; qj., quadrato-jugal ; g«., quadrate; socc, space tor 

 supraoccipital ; sq., squair.osal ; st., sujiratemporal ; «., vomer. 



* N. Yakowlew, " Neue Funde von Trias-Sauriern auf Spitzhergen," A'erhandl. 

 russ.-k. mill. Ges. vol. .\1. (1902), p. 180, pi. iii. j " Nachtrag," loc. cit. vol. xli. (1904), 

 pp. 1(35-100. 



