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Show 476 DR. J. V. HAAST ON ZIPHIUS NOVJE-ZEALANDIvE. [June 6, out doubt it injured itself in the same manner as the Lyttelton- Harbour specimen did. The skull under review is also derived from an aged individual; and, with the exception that its rostrum is rather narrower than that of the Lyttelton-Harbour specimen, it has otherwise somewhat larger proportions. The most marked difference, however, is in the form of the prefrontals. In this skull the premaxillaries are much more excavated, and stand 1*53 inch apart in the centre of the rostrum. The prefrontals, as in the former skull, begin 6*50 inches from the point of the rostrum, forming at the beginning a ridge, which continues for about 11 inches, constituting the central portion of these bones and only gradually disappearing. For the last 5 inches they have a concave form ; the premaxillaries here approach each other as in the Port-Lyttelton specimen, but stand always half an inch apart. Here the beginning of the septum narium rises to within the eighth of an inch of the surface of the premaxillaries, gradually getting thinner and turning obliquely to the left, resting against the left of these latter bones. The excavation in the septum narium, however, is much deeper and wider than in the first-described skull, being 3 inches wide and 2| inches deep. There is also considerable difference in the teeth of the two skulls. The tooth of this skull is 2*85 inches long, and 0*61 inch broad; it is covered everywhere with rough cement, which forms, principally near the lower extremity, wart-like protuberances, taking near the root-end ridgy forms. It is consequently longer than the tooth of the Lyttelton-Harbour specimen, and, although the tenth of an inch thinner, is a little heavier (198 grains). A portion of the pterygoid has been cut away when taking out the skull; otherwise it is in a fine state of preservation. Table of Measurements. Extreme length of skull with lower jaw ,, „ of cranium Length of rostrum from the apex of the praemaxillae to the middle of the line drawn between the anteorbital notches Greatest height from top of nasals to lower border of pterygoid Greatest breadth across postorbital processes of frontals Breadth of occipital condyles ,, of foramen magnum Height of foramen magnum Breadth of base of rostrum between bottom of anteorbital notches Breadth of rostrum in the middle Anterior nares, greatest width of the two Height of crest above occipital foramen Width of occiput ft. in. 3 4*90 3 3*15 1 10*50 1 5*85 1 9*12 7*20 2*62 2*31 1 0*50 5*00 305 1 3*20 1 5 05 |