. On the natural history and classification of birds . nder, slightlycurved ; hinder one very long, and nearly Senegalensis. PL Enl. 332. Burchellii. Part 5. No. 2 324 ON THE CLASSIFICATION OF BIRDS. Subfam. CROTOPHAGIN^E. Hombill , Linn. Bill very broad on the sides. Theculmen high, and forming an elevated ridge or keelwhich divides the frontal feathers,sulcirostra. Part 5. No. 124. rugirostra. lb. No. lb. No. 122. semisulcata. lb. No. 194. Dasylophus, Sw. {Jig. 286. a) Bill rather large, com-pressed its whole length. Gonys angulated. Culme
. On the natural history and classification of birds . nder, slightlycurved ; hinder one very long, and nearly Senegalensis. PL Enl. 332. Burchellii. Part 5. No. 2 324 ON THE CLASSIFICATION OF BIRDS. Subfam. CROTOPHAGIN^E. Hombill , Linn. Bill very broad on the sides. Theculmen high, and forming an elevated ridge or keelwhich divides the frontal feathers,sulcirostra. Part 5. No. 124. rugirostra. lb. No. lb. No. 122. semisulcata. lb. No. 194. Dasylophus, Sw. {Jig. 286. a) Bill rather large, com-pressed its whole length. Gonys angulated. Culmenconvex, gradually arched. Frontal feathers incumbent,and concealing the nostrils. Feathers before theeye erect, forming a double crest. D. superciliosus. Sw. Pho3nicoph^:us, Vieillot. {fig. 286. c) Bill large, verythick, smooth, resembling that of a toucan in naked. Nostrils basal, oval, close to the rictus,placed in a groove of the bill, and defended by stifferect viridis. pyrrhocephalus. Vieil. Gal. pi. Subfam. LEPTOSTOMIN^. Long-billed Cuckows. Saurothera, Vieillot. (fig. 286. 6) Bill lengthened,longer than the head, straight, except towards thetip : the culmen convex. Gonys straight. Theupper mandible with its margins finely naked. Wings moderate; the second andthird quills the longest. Feet short. (Vieillot.)S. velata. Vieil. Gal. pi. 38. AnadjENus, Sw. General structure of Saurothera ; butthe upper mandible is only notched at the tip: themargins entire. Wings much rounded; the four firstquills graduated. India. A. rufescens. Part 5. No. 193. TENUIROSTRES. MELIPHAGID^. 325 Leptostoma, Sw. Bill very long, entire. Wings veryshort, and rounded. Tail long, cuneated. Tarsusmuch longer than the toes. {fig. 172. p. 40.)L. longicauda. Sw. (1824). ? the Sauroth. Bottce Blainv. Subfam. INDICATORIN^S. Honey Guides. Bill short, subconic. Feet very short. Indicator, Le Vaillant. Bill straight, finch-like ; thebase triangula
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