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Show 310 PROF. HUXLEY ON THE A LECTOROMORPHAE. [M&y l ' those of the Pigeons in their general form, and P*"*"^ j £ development of the inner lamina. The ^^^^Tthere other hand, are as ill-developed as in many ^ ^ ^ ° X u s arrangement is not the slightest approximation to the desmognathous arrange* of Corythaix. The vomer, as already desc*^, « ^ n d e compressed from side to side, though it tends to expa^ It resembles the vomer in the Peristeropodes which ii adist y ossified, slender, and compressed from side to side, but tapers point in front. Fig. 13. Fig. 14. Fig. 15. Fig. 13. The skull of Opisthocomus, viewed from above. 14. The mandible, viewed from above. 15. Side view of the skull of Opisthocomus. There are no basipterygoid processes-a circumstance in which Opisthocomus differs from all the Alectoromorphce and most of the Pigeons*. In the antero-posterior convexity of the basitemporals * In Goura they are sometimes almost obsolete ; and they are absent in Didus and Peeopkaps. |