Fragments of premaxillary bones. The largest portion is 21/2 inches long, and is fractured behind the socket for the fourth tooth, and the upper part of the nose is also broken away. The palate is flattened, with the median part slightly convex. The sides of the jaw converge upward, but not rapidly; in front they round into each other, but there is a slight mesial depression. The front pair of teeth are large, separated from each other and from the second pair by films of bone. Above the first pair of sockets, so as to look downward and forward, is an impressed lunate area 9/16ths of an inch wide and 5/16ths of an inch high, to which a soft lip may have been attached. This area is in the same plane with the first pair of teeth and at right angles with the upper outline of the nose. The sockets of the first pair of teeth are a little smaller than the second pair; they are both about half an inch in diameter and nearly circular. An interspace of 3/16ths of an inch separates the second socket from the third. The tooth is elliptical, the socket being narrower and longer than that of the second. The palatal interspace between the third pair is more than 3/4ths of an inch. The interspace between the third and fourth sockets is about 3/8ths of an inch. The diameter of the nearly circular fourth socket is 1/4th of an inch.

The overhanging lunate lip space, with the size of the teeth and width of the palate, abundantly distinguish this species.

XXII.

Case.Comp.Tablet.Specimen.
Jc181—4

Ornithocheirus woodwardi (Owen).

I regard the fragment on which this species was founded as being the terminal end, and not a section of a jaw; partly from the rounding of the lateral surfaces to the front, and chiefly from the snapped off teeth in the middle of the truncated anterior end, for they are smaller than the pair behind them, and look forward at a greater angle, so that the converging sockets of both pairs meet behind. These characters are well shown in Mr Dinkel's excellent figure, Pl. II. fig. 3a. Second Sup. Palæont. The palate is destroyed, and gives no clue to the bone being either lower or upper.

Another specimen, rather smaller, shows the rostrum well rounded; the front is truncated at right angles to it: there is the same rounding of its lower part into the sides, and the stumps of the front pair of teeth are visible though they are again worn level with the rugose front of the snout.

But the finest fragment of this species is a rostral end, (perhaps of the upper jaw) three inches long, two inches deep, and with the palate as wide. It indicates 5 teeth on a side: the front pair small, 2nd and 3rd much larger, and two pairs behind, which are smaller. The palate is flat, and attains its greatest width at the third tooth, behind which it contracts noticeably. The third tooth is more than half an inch in diameter, the fourth is 5/16ths of an inch long. The spaces between teeth seem equal to the long diameter of the sockets, which are oval and straight. The sides round into the front of the muzzle more gradually in this specimen than in the others. An impressed line runs along the median ridge of the upper surface. Just as the jaw gets narrower behind, so the well-rounded upper surface becomes more acute behind.

Behind the third socket the palate measures 17/8 inch from side to side, and the jaw is there nearly 2 inches high.