7 [Vol. xiii. 



Mr. Rothschild also exhibited specimens of the recently- 

 described Micranous diamesus, Heller and Snodgrass, and 

 the three Gannets with sooty-brown backs, viz. Sulci sulci, 

 Sulci brewsteri, and Sula nesiotes, Heller and Snodgra-s. 

 Besides explaining the differences of the three forms, he 

 called attention to the larger dimensions of the females, 

 especially as regarded the size of their bills. 



Mr. Rothschild then read a paper on a hitherto overlooked 

 species of Gannet, of which he exhibited specimens : — 



" Until the publication of Volume xxvi. of the ' Catalogue 

 of Birds/ the species of the genus Sula were but little under- 

 stood. Mr. Ogilvie-Grant has done good work and cleared 

 up many doubtful points, but owing to the universal lack of 

 series and the extraordinary changes of plumage undergone 

 by these birds, there are still many points to clear up. 



"In the present case Mr. Grant identified the Galapagos 

 Masked Gannet as the adult of Sula variegata ; while what he 

 described as the youngest stage of Sula variegata is really the 

 young of Sula nebouxi. Mr. Beck has now sent specimens 

 of the young in various stages of the Galapagos Masked 

 Gannet, which prove it to be distinct from .S. variegata. 

 I therefore have much pleasure in naming it Sula granti. 

 It is described as the adult of £. variegata, Cat. B. Brit. Mus. 

 xxvi. p. 434/' 



Mr. R. H. Beck was warmly congratulated by the members 

 on the success of his recent expedition to the Galapagos 

 Archipelago. 



Dr. Bowdler Sharpe exhibited specimens of the following 

 new species from the Ruwenzori range, obtained by Mr. 

 Frederick J. Jackson, C.B. : — 



Cuculus jacksoni, n. sp. 

 $ . Similis C. gabonensi, sed abdomine et subcaudalibus late 

 nigro transfasciatis distinguendus : rostro nigro ; pedi- 

 bus pallide brunneis, plantis albidis ; iride bruunea. 

 Long. tot. 11'5 poll., culm. 095, alas 6'5, caudee 5*6, tarsi 

 0-7. 

 Hab. Toro, March 21, 1902. 



