66 Drs. Giglioli and Salvador! on 



Another specimen, perhaps a younger bird, has the under 

 parts, and especially the throat, lighter, the pure white of the 

 basal portion of the feathers showing amidst the fuliginous- 

 brown of the rest. 



This species belongs to that group of ^strelatee characterized 

 by a uniform sooty-brown plumage, and generically distin- 

 guished by Bonaparte as Pterodroma. 



Our bird dix&ev^ivova P.macrojitei-a (Smith) {Procellaria fuli- 

 ginusa, Kuhl, nee Gm.) in its smaller dimensions, and in its 

 relatively longer wings, which extend about 3 inches beyond 

 the extremity of the tail — also in the pure white (not greyish, 

 as in P. macropterd) of the basal part of the feathers which 

 clothe the neck and under parts. But the main distinction lies 

 in the bill, which in our species is much smaller and weaker*. 



j^. trinitntis appears to be rather smaller than Procellaria 

 caribbaa, Carte (P. Z. S. 1866, p. 93, pi. x.), from which it 

 may be at once distinguished by the peculiar cinereous colour 

 of the rump and upper tail-coverts in the last-named species. 

 It is hardly worth while noticing that our species differs from 

 P. aterrima, Verreaux, in the uniform black of its feet, and from 

 P. bulweri, Jardine and Selby, which is so much smallerf. 



* Three specimens of jE. macroptera form part of the Ornithological 

 collections made during the voyage of the * Magenta/ and beyond doubt 

 are the same as P. atlantica (Gould). 



t Having described four new species of JEstrelata^ we add a list of the 

 species which now compose the genus. Those marked with an asterisk 

 form part of the ' Magenta ' collections, the appended number showing 

 how manj' specimens were prepared. 



a. JSsTRELATA. h. Cook:ii,aeia, Bp. 



1. ^strelata haesitata {Kuhl). 12. ^strelata cooki {Gray). 

 *2. M. lessoni (Gartiot). (P. 13. JE. guvia (Licht.). 



leucocephala, Licht.) (4.) 14. JE. desolata (Gm.). 



*S. M. incerta (SchJpg.). 1.5. JE. gularis (Peale). 



4. M. rostrata (Peale). *1(3. JE. defilippiana, nob. (4.) 



*5. jE. magentfe, nob. (1.) 

 *6. jE. arminjoniana, nob. (2.) <?• Pterodroma, Bp. 



7. tE. parv'irostris (Peale). *17. JE. macroptera {Stnith). (3.) 



8. JE. neglecta (Schleg.). *18. JE. trinitatis, nob. (2.) 



9. JE. solandri (Gould). 19. JE. caribbaea (Carte). 

 10. JE. grisea (Kuhl). 20. JE. aterrima ( Ve)-r.). 



m. JE. mollis (Gonld). (4.) 21. M . bulweri (Jard. Sf Selbtj). 



