ris margine vix indentato ; nnribus basalibus et vix tectis ; 

 tarsis brevioribus, unguibus raajoribus et plūs curvatis. 



Oactohnis scandens. (Spec. typ.) Cact. intensi/uliffhiosa, crisso 

 albo ; rostro et pedibus nigrescenti-hrunneis . 



Long. tot. 5 unc. ; rostri, į; alce, 2^\ caudcc, 1|; tarsi, J. 



Foem., vel Mas jun. Corpore superiore, gutture pectoreąue in- 

 tcnsh brunneis, singulis phmis pallidiori marginatis ; abdomine 

 crissogue cinereis, stramineo tinctis ; rostro pallid'^ fusco ; pedi- 

 bus nigrescenti-fuscis. 



Cactornis assimilis. (Mas juri. ?) Cact. corpore suprcL fuligi- 

 noso, nec non gutture abdomineque, illorum plumis, cinereo mar- 

 ginatis ; rostro pallidi riifescenti-brunneo ; pedibus nigrescenti- 

 brunneis. 



Long. tot. 5^ unc. ; rostri, |; alce, 2f ; caudce, 1|; tarsi, |. 



Certhidea (subgenus). 



Certhidea diiFert a genere Geospizd rostro graciliore et acutiore ; 

 naribus basalibus et non tectis ; mandibulce superioris margine 

 recto ; tarsis longioribus et gracilioribus. 

 Certhidea olivacea. Cert. summo capite, corpore superiore, alis 

 cauddque olivaceo-brunneis ; gutture et corpore infra cinereis ; 

 rostro pedibusgue pallide brunneis. 

 Long. tot. 4 unc. ; rostri, ^ ; alcs, 2 ; caudee I į ; tai'si, f. 

 Of the groups here characterized, Geospiza, Camarhynchus , and 

 Cactornis, belong to one type ; but with regard to Certhidea, Mr. Gould 

 remavked that although he confidently believed that it should also be 

 referred to the šame group with the three former, yet in its slighter 

 form and ■weaker bill it has so much the appearance of a member of 

 the Sylviada, that he would by no means insist ujjon the above view 

 being adopted until the matter shall have been more fuUy investigated. 

 Mr. Gould deferred entering into any further details respecting 

 the species under consideration until Mr. Darwin had fumished him 

 with some information relating to their habits and manners. 



Mr. Gould then resumed the eshibition of a portion of his own 

 coUection of Birds from Australia, and characterized the following 

 new species : 



Hemipodius melanogaster. 



Hem. capite, auriculis, guld abdominecue nigris ; linedsuper oculum 

 oriente et ad nucham excurrente, plumis singulis maculd ad apicem 

 albd ; nuchce plumis nigris et castaneis, maculis pluribus albis ; 

 dorso superiore castaneo-fusco, plumis singulis maculd albd, lineis 

 duabus nigris cumfascid unicd nigrd apicali ; scapulis, tectricibus 

 pritnariis secu7idariisque ru/o-brunneis, plumis singulis maculd 

 albd nigro circumdatd; remigibus primariis saturate brunneis ; 

 fcmoribus et tectricibus superioribus et inferioribus caudee brun- 

 neis nigro fasciatis et irroratis ; rostro jjallide brunnco ; pedibus 

 carneis. 



