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INTRODUCTION. 21

The members of the present section, in fact, differ so much in their general contour from all the other
members of the family, as to present the idea of their leading off to some other group of the Gallinacee,

apparently to the Guans and Curassows.

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The species are :-—

 

22. Dendrortyx macrourus : ‘ : : : : : IE XOXe
29. === == llencapins : : . : : : 5 Pl. XXI.
24. barbatus . : . ‘ : : : : Pl. XXII.

The sexes are alike in plumage, and merely differ in the somewhat smaller size of the females.

For the seventh section I retain M. Vieillot’s name of

ODONTOPHORUS,
WITH THE FOLLOWING CHARACTERS :—

Rostrum forte, lateraliter compressum, culmine valde arcuato, et ad apicem deorsim curvato: mandibula inferiore
recta, distincte bidentata utrinque apicem versts, tomiis incurvatis et peracutis; nares grandes, membrana
obtectz et circumdate; caput cristatum; orbitis nudis; ale concave, primariis rigidis, prima brevissima,
quinta et sexta ceteris prestantibus; cauda admodim brevis, concava, rotundata, et e plumis duodecim mol-
libus et laxis confecta; tars: elongati, robusti, et fortiter reticulati; digitis anterioribus, membrané ad basim
conjunctis ; omnibus elongatis, presertim intermedio ; digito posteriore brevi, et debili; unguibus elongatis,

feré rectis, et acutis.

Bill robust, compressed laterally, and with the culmen very much arched and bent downward at the point; under
mandible straight, and with two distinct dentations on each side near the point ; tomia curved inwards and
very sharp; nostrils large, covered and bordered with a membrane; head crested; orbits naked ; wings very
concave; primaries rigid, the first the shortest, and the fifth and sixth the longest; tail very short, concave,
rounded at the end, and composed of twelve soft and unresisting feathers ; tarsi lengthened, robust, strongly
reticulated and spurless; anterior toes united at the base by a membrane, and very long, particularly the
middle one; the imner one the shortest ; posterior toe short and feeble ; nails lengthened, nearly straight, and

sharp at the point.

Of this particular form, eleven species are now known, all of which, with the exception of O. strophium,

O. speciosus, and O. Columbianus, have, in addition to the characters given above, the outer webs of the

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