. A descriptive catalogue of the marine reptiles of the Oxford clay. Based on the Leeds Collection in the British Museum (Natural History), London ... Reptiles, Fossil. METEIORIITNCHUS. 147 curve towards one another till they nearly meet in the middle line; they then diverge again and die away at about the level of the hinder end of the dental series; at their posterior end they may be represented by a row of foramina only. In M. moreli and 31. brachyrhynclius they terminate a little in front of the anterior angle of the palatal vacuity. Along their median symphysis the palatine surface of the
. A descriptive catalogue of the marine reptiles of the Oxford clay. Based on the Leeds Collection in the British Museum (Natural History), London ... Reptiles, Fossil. METEIORIITNCHUS. 147 curve towards one another till they nearly meet in the middle line; they then diverge again and die away at about the level of the hinder end of the dental series; at their posterior end they may be represented by a row of foramina only. In M. moreli and 31. brachyrhynclius they terminate a little in front of the anterior angle of the palatal vacuity. Along their median symphysis the palatine surface of the maxillae is raised into a slight ridge, which in that region separates the grooves just described. Where the maxillae are separated by the palatines, their palatal surface is gently concave from side to side and continues to be so as far as the palatine vacuities. The posterior prolongations of these bones form the outer border of the anterior portion of the openings just referred to and terminate about opposite their middle point; the alveoli are continued almost to the tip of these prolongations, the upper side of which is over- lapped by the anterior end of the jugals which shut out the maxilla? from any share in the formation of the orbit. The facial surface of the maxilla is strongly convex from side to side, and a section of the upper surface of the snout, in the region where the maxilhe meet in the middle Text-fig. 56. pg* als. fn. Skull of Metriorhynehus superciliosum from right side, the palatine portions of the skull being omitted. als., alisphenoid ; /., lachrymal foramen ; Jr., frontal ; j., jugal; I., lachrymal; , lateral temporal fossa; ma:., maxilla; n., nasals; nar., external nares ; par., parietal; pmx., premaxilla; , post- frontal; , prefrontal ; , pro-otic; q., quadrate; , quadrato-jugal; sq., squamosal. dorsal line, makes a curve rather greater than a semicircle. This strong convexity of the snout is continued in the region of the n
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectreptile, bookyear1910
