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Show 482 DR. M U R I E O N F R E G I L U P U S V A R I U S . [June 16, indeed rather depressed and broad on the top. The triangular narrowing of the bill, though regular, is decidedly most marked and compressed from the nostrils forwards. The orange-coloured, horny, mandibular case having been retained on one side, enables m e to state that at the apex, above and below, there is faint indication of a terminal, shallow notch ; whilst behind there is slight roughening of the free margins, this, however, possibly being due to drying and wear. As far as appearances go, the ends of the mandibles meet together in a point, and it seems the lower horny case has greater depth than the upper. The membranous orifice of the nostril is only 0-15 inch, or 2 lines, in antero-posterior diameter, altogether being a small, low-set, narrow, oval aperture, situated 1*1 inch from the tip of the horn-clad rostrum. Turning to the bones of the lower base, we observe that the prae-maxillae and palatines coalesce anteriorly, and with shallow concavity. The palate, posteriorly, is open, and only covered by membrane in the fresh state. The inward shelving narrow palatal rods terminate posteriorly in oblique-set outer plates, whose free ends are emarginate, with short, rounded, external angles. The inner half-twisted and vertically directed palatal laminae reach considerably further back, and run beneath the pterygoid abutment, leaving, however, a middle cleft of medium width and depth. The fair-sized vomer is cleft behind, truncate in front; and the septum narium is apparently unos-sified. The maxillo-palatine of the one side was injured ; but in the other I made it out to be a narrow pedicle directed towards the middle and sides of the vomer, not crossing that bone, or united to its fellow of the opposite side. The pterygoids have shafts and ends moderate in their proportions, as is the length of each bone. Posteriorly they possess an upward-directed tabular process lying within the root of the front limb of the quadrate. The jugals are very delicate bony rods, and they lie against the outer lower border of the lachrymals, but not beneath them. As regards the quadrate, it is stout and high, the lower articular knuckles being relatively well pronounced. The following are the noteworthy points in the shape and disposition of the bones, as examined on the upper posterior and lateral superficies of the cranium. The tapering praemaxillae have a sensible curvature, narrow, but dorsally rounded, with a slight eminence at rear of nares. There is a prefrontal depression ; a tuberose swelling above the foramen magnum, with muscular impressions on either side. This occipital face is widely arched, and smooth beyond. Temporal groove shallow ; orbit of moderate circumference ; interorbital septum with two large fenestra?; lachrymal coalescent with ethmoidal expansion. I can substantiate what has been averred of the tongue. Fig. 10. Plate L X I L , shows its upper surface, along with the hyoid bones. In this specimen it is above an inch long, and seems to have reached quite halfway along the symphysial union when ordinarily at rest in the mouth. It is apparently horny in structure, sagittate in shape, but elongate; the margins slightly raised, so as to produce shallow |