284' Zuological Society. 



striated lengthwise and across, sometimes dilated at the summit ; 

 the intermediary plate between the two teeth of a whitish colour. 



December 13. — Prof. Rymer Jones in the Chair. 

 Mr. Gould, at the request of the Chairman, exhibited some new 

 species of the genus Ortyx, which he thus characterizes : — 



Ortyx nigkogularis. Ort. vertice et corpore superiore splendide 

 fuscis ; strigd nigrd superciliari, a rostro usque ad occiput ; et 

 super heme strigd albd ; sub oculos lined albd a rostro ad plumas 

 auriculares, et per latera colli excurrente, gulamque nigram circtim- 

 dante plumis pectoris et abdominis albis nigra marginatis angusti 

 apud pectus, late et distincte apud abdomen, et sese squamatim 

 ostendentibus ; femoribus crissoque arenaceo-castaneis ; plumis la- 

 teralibus in medio albis. 

 Crown and all the upper surface rich brown ; margins of the 

 tertiaries and wing-coverts fawn-colour; these feathers are also 

 crossed with indistinct zigzag lines, freckles, and blotches of black 

 and blackish brown ; primaries greyish brown ; tail deep bluish grey, 

 the centre feathers and the external margins of the remainder freckled 

 with reddish brown and buff ; a black stripe, commencing at the base 

 of the bill, passes over the eye to the occiput ; above this a stripe of 

 white ; below the eye a white line from the base of the bill to the 

 ear-coverts, down the sides of the neck, and encircling the throat, 

 which is jet black ; feathers of the chest and abdomen white, mar- 

 gined with a zone of black ; narrow on the chest, broad and distinct 

 on the abdomen ; giving the under surface a scaly appearance ; flanks, 

 thighs and under tail-coverts sandy chestnut, the centre of each of 

 the flank-feathers white ; bill black ; feet flesh-white. 



Total length, 8 inches ; bill, fj. ; wing, 4^ ; tail, 2J- ; tarsi, 1^. 

 Hab. Mexico ; locality unknown. In the collection of the Earl of 

 Derby. 



Remark. — This species is of the same form and nearly of the same 

 size as O. Virginiana. 



Ohtyx pectoralis. Ort. vertice et nuchd nigrescenti-fuscis ; li7ied 

 angustd albd frontali super oculos et per nucham ductd ; plumis 

 auricularibus, colli lateribus, et pectore nigris ; guld albd ; abdo- 

 mine, lateribus et crisso, cervinis ; plumis lateralibus inferioribus, 

 ad apices nigro alboque guttatis dorso superiore, humeris scapulis- 

 que castaneis, tectricibus alarum, et caudee, tertiariis, et dorso imo, 

 cinereo-fuscis ; plumis omnibus corporis superioris cervino pallide 

 marginatis, et punctatis. 

 Crown of the head and back of the neck blackish brown ; a narrow 

 stripe of white crosses the forehead, passes over the eye, and extends 

 down the back of the neck below the occiput ; ear-coverts, sides of 

 the neck and chest, black ; throat white ; abdomen, flanks and under 

 tail-coverts fawn-colour ; the tips of the feathers on the lower part 

 of the flanks spotted with black and white ; the upper part of the 

 back, scapularies and shoulders, chestnut brown ; wing-coverts, ter- 

 tiaries, back and upper tail-coverts greyish-brown ; all the feathers 

 of the upper surface margined and speckled with very light fawn- 



