AVIFAUNA OF LAY SAX. 



25 



12. SULA CYANOPS (Sundev.). 



MASKED GANNET. 



Sula dactylatra, Less. Voy. < Coquillc/ ii. p. 491- (18.26) ; id. Tr. d'Orn. p. 601 (1831) (Ascension) ; G. R. Gray, 

 Gen. B. iii. p. 666 (1845) ; Pucher. Rev. et Mag. Zool. 1850, p. 6.26 (crit. of Lesson's type) ; Hartl. 

 J. f. O. 1855, p. 4.20 (crit. ; spec, bon.) ; Bp. Consp. ii. p. 165 (1855) ; Scl. Ibis, 1859, p. 35.2 (note) ; 

 Bryant, J. f. 0. 1861, pp. 57, 59 (Bahamas) ; Hume, Stray Feath. v. pp. 311, 312 (crit. remarks) ; Milne- 

 Edw. Ann. Sc. Nat., Zool. ser. vi. t. xiii. art. n. 35, pi. xiii. (1882) (Antarctic Regions). 



Sula nigrodactyla, "Less./' in the synonymy of S. dactylatra, Bp. Consp. ii. p. 165 (1855). 



Dysporus cyanops, Sundev. Physiogr. Siillsk. Tidskr. 1837, p. .218, tab. 5 (Atlantic) ; id. Isis, 1812, p. 858; id. 

 Ann. & Mag. Nat. Hist. xix. p. 236 (1817) ; Hartl. & Finsch, Vog. Ost-Afr. p. 843 (1870) ; Sund. P. Z. S. 

 1871, p. 125 (Galapagos) ; Gigl. Viaggio Magenta, pp. 843, 844, 884 (1875) (Peru) ; Nchrk. J. f. O. 

 1879, p. 410 (egg) ; Finsch, Ibis, 1880, pp. 431, 431 ^Gilbert Is.). 



Sula cyanops, G. R. Gray, Gen. B. iii. p. 666 (1815) j Bp. Consp. ii. p. 166 (1855) ; Scl. P. Z. S. 1856, p. 1 15 ; 

 id. Ibis, 1859, p. 352; Schleg. Mus. P.-B., Pelecani, V . 39 (1863) (Torres Str.) ; Shelley, B. Egypt, p. 21)1. 

 (187.2); Heugl. Orn. N.O.-Afr. p. 1480 (1873); Salvad. Ucc. Borneo, p. 367 (1871) ; Lawr. Proc. 

 Boston Soc. N. If. xiv. p. 302 (Socorro Is.) ; Hume, Stray Feath. v. p. 307 (criticism) ; Sol. & Salv. 

 P. Z. S. 1878, p. 652 (Kaine I.) ; Scl. P. Z. S. 1879, p. 310 (egg) ; Penrose, Ibis, 1S79, pp. 275, 283 

 (Ascension); Legge, B. Ceylon, p. 1110 (1880); Salvad. Ann. Mus. Civ. Gen. xviii. p. 101 (1882) 

 (distribution) ; id. Orn. Papnas. iii. p. 416 (1882) ; Ridgw. Man. N.-Am. B. p. 75 (1887) ; Cory, Auk, 

 1888, p. 71 (W. Indies) ; id. Auk, 1889, pp. 31, 32 (Cayman Brack and Little Cayman Is.) ; Murray, 

 Stray Feath. 1887, p. 165 (Kurrachi) ■ Cory, Cat. W. Ind. B. p. 84 (1892) ; Wiglesw. Abb. u. Ber. 

 Mus. Drcsd. 1890-91, p. 7.2 (1892, in " Avcs Polynesia"). 



Sula personata, Gould, P. Z. S. 1846, p. 21 (N. Australia) ; id. B. Austr. vii. pi. 77 (1818); Macgill. Voy. 

 Rattlesn. ii. p. 359 (1852) ; Cass. U.S. Expl. Exp. p. 368 (1858); Jerdon, B. Ind. iii. p. 85.2 (1861) ; 

 Cab. & Reichen. J. f. O. 1876, p. 3.29 (Timor) ; Crowfoot, Ibis, 1885, p. 269 (Norfolk I.). 



Sula bassana, Thomps. (nec Linn.), Allen's Niger Exped. ii. p. 175 (1818). 



Sula melanops, Hartl. Ibis, 1859, p. 351, pi. x. figs. 2, 3 (Bur da Rcbschi, Somali coast) ; Heugl. Petcrm. 



Geogr. Mitth. 1869, p. 418 (in Orn. N.O.-Afr. Heuglin admitted the identity with S. cyanops). 

 Dysporus dactylatra, Gundl. J. f. O. 1875, p. 403 (Cuba). 



Although there can be hardly any doubt that Sulci dactylatra of Lesson is referable to the 

 present species, and that, according to the strict modern rules of nomenclature, his name 

 should take priority over Sula cyanops, Sundev., I refrain from accepting it, because 

 Lesson's description is so bad (and even wrong) that it does not well diagnose the species ; 

 besides, it is one of the worst hybrid names ever given to a bird. 



Adult. Upper mandible yellowish horn-colour in life and in dried skin, the lower mandible 

 shaded with dusky. Face and naked skin on throat blackish in skin, blue-black in life. 



E 



