. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. DUNN: NOTES ON THE SNAKE GENUS ANOMALEPIS 523 f. Upper jaw mechanisms. There is a chain of three bones on each side, the anterior bearing teeth. These chains were outside the skull and completely detached from the rest of the specimen. The posterior bone, the pterygoid, is a long rod-like structure, slightly curved at the anterior end. It is not dissimilar to that of Typhlops punctatus (Haas, 1930), except at the anterior end. Here the curved end overlaps the end of another bone extending still further forward, while
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. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. DUNN: NOTES ON THE SNAKE GENUS ANOMALEPIS 523 f. Upper jaw mechanisms. There is a chain of three bones on each side, the anterior bearing teeth. These chains were outside the skull and completely detached from the rest of the specimen. The posterior bone, the pterygoid, is a long rod-like structure, slightly curved at the anterior end. It is not dissimilar to that of Typhlops punctatus (Haas, 1930), except at the anterior end. Here the curved end overlaps the end of another bone extending still further forward, while in punctatus the end of the pterygoid is slightly forked to meet a bone extending crosswise. The middle bone is slightly curved posteriorly where it overlaps the end of the pterygoid (the two bones curve across each other), and slightly blunted and forked anteriorly where it bears against the hind. Fig. 2. Left supraorbital and postorbital; lateral view showing position of eye. end of the maxilla. This bone is usually called the palatine, but it might equally well be the ectopterygoid. It is in contact posteriorly with the side of the pterygoid and anteriorly with the hind end of the maxilla, and this is precisely how the ectopterygoid of lizards and of normal snakes is oriented. The palatine in lizards and in normal snakes runs between the anterior end of the pterygoid and the side of the maxilla. It has this relationship in Leptotyphlops. In Typhlops, while the mechanical relations are those of Anomalepis, the bone in question is in contact with the anterior end of the pterygoid. The form of this bone seems to vary a good deal in the different species of Typhlops. The view may be maintained, although I lay no stress on it, that the Leptotyphlopidae have lost the ectopterygoid and retained the pala- tine, while the Typhlopidae (including Anomalepis) have retained the ectopterygoid and lost the palatine. The maxilla is a flattish, roughly triangular bone, quite like the maxilla