24 



ft. in. lin. 



Length from tip of muzzle to angle of mouth 7 9 



Length of dorsal fin (along the anterior margin). ... 1 5 



Height of ditto 6 4 



Length of pectoral, (along anterior margin) 1 2 8 



Width of tail 1 4 5 



Girth of body before dorsal fin 3 6 



Girth of body before pectoral fin 2 8 2 



Girth of body before tail fin 7 8 



Girth of head over the eyes 2 



Habitat, Coast of Patagonia, lat. 42° 30'. (AprU). 



" This species, Avhich I have taken the liberty of naming after 

 Captain Fitzroy, the Commander of the Beagle, approaches, in some 

 respects, to the DelpMnus superciliosus of the ' Voyage de la Co- 

 quille,' but that animal does not possess the oblique dark-gray bands 

 on the sides of the body; it likewise wants the gray mark which ex- 

 tends from the angle of the mouth to the pectoral fins. In the figure, 

 the under lip of the Delph. superciliosus is represented as almost white, 

 whereas in the present species it is black : judging from the figures, 

 there is likewise considerable difference in the form. The figure 

 which illustrates this description agrees with the dimensions, which 

 were carefully taken by Mr. Darwin immediately after the animal 

 was cajjtured, and hence is correct." 



Mr. Gould exhibited two species of the genus Ptilotis, which he 

 characterized as Ptil. ornata, and Ptil. fiavigula, 



Ptilotis ornata. Ptil. vertice, alarum marginibus externis, nee 

 11071 Cauda olivaceis ; dorso uropygioque brunneis ; guld, genis- 

 que olivaceo-fuscis ; pectore corporeque subtiis cineresceulibus, 

 singulis plumis notd lata brunned in medio ornatis ; crisso 

 pallide badio plumis fusco striatis, penicilld nitidejlavd utrum- 

 que colli latus ornante ; notd longitudinali sub oculos olivaced; 

 primariis rectricibusque caudce fuscis, his ad apicem externum 

 albis ; rostro nigrescente ; pedibus brunneis. 



Long. tot. 6| unc; rostri, |; alee, 3f ; caudce, 3^; tarsi, |. 



Hab. Swan River, Australia. 



Ptilotis fl a vigul a. Ptil. capite, nuchd, getiis, corporeque infe- 



riore nigro-griseis, hoc colore apud abdomen o^issumqiie olivaceo 



tincto ; plumis auricularibus argenteo-cinereis et post has guttd 



Jlavd ; giddjlavd; alis, dorso, cauddque, Jlavescenti-olivaceis ; 



femoribus olivaceis ; rostro pedibusque nigrescentibus. 



Long. tot. 8 unc; rostri, 1; alee, 4^; caudce, 4^; tarsi, 1. 



Hab. Van Diemen's Land and New South Wales. 



