Vol. xxv.] 8 



mottlings. Throat rusty olive-brown. Rest of the underparts 

 whitish-grey, becoming whiter towards the vent ; sides of 

 breast and body black, with two more or less complete pure 

 white bars; lower flank-feathers brown with black spots. 

 Under tail-coverts black, mottled aud tipped with white. 

 Outer under wing-coverts brown, inner ones and axillaries 

 white. Feet in skin reddish-brown. A small red caruncle 

 in the middle of the throat. Wing 150 mm.; tail 60; 

 culmen 25 ; tarsus 45. 



A single specimen, the sex of which was not ascertained, 

 was obtained by Mr. Gustav Schneider in the district of 

 Batu Bara, on Mt. Si Bajak, in the Battak Mountains, 

 North-west Sumatra. 



This new species (the type of which is in the Tring 

 Museum) is named, at Mr. Schneider's request, in honour 

 of Mr. von Roll, who greatly assisted the former in his 

 zoological researches in Sumatra, and who actually procured 

 this bird. 



Obs. Arboricola rolli is evidently allied to another Sumatran 

 species, A. rubrirostris, Salvad. The upper surface is simi- 

 larly coloured, except that in the latter the head is black 

 with drop-like white spots and the inner upper wing-coverts 

 have no rufous edges. The bill of A rolli is black instead of 

 red. The white auricular patch is absent in A. rubrirostris, 

 and the latter has more white bars on the flank-feathers ; 

 it is, moreover, smaller. 



Mr. Rothschild also exhibited pieces of the egg-shell of 

 some large Struthious bird allied to JEpyornis, as was shown 

 by the structure of the shell. These had been found by 

 Dr. Hartert in the South Algerian Desert, between Touggourt 

 and El Oued. For the sake of comparison Mr. Rothschild 

 showed some pieces of egg-shell of Strut hio camelus found 

 by himself in the same region. 



Mr. Rothschild likewise exhibited his specimen of the 

 the egg of Megalapteryx huttoni. He said that, though 

 slightly cracked, it was the only complete egg in England, 

 as the one belonging to the late Mr. Dawson Rowley and 



