Oedeb ANSEEES.] [Fam. PROCELLABIIDjE. 



PROCELLARIA COOKII. 



(COOK'S PETREL.) 



Procellaria cookii, Gray in Dieff. Trav. ii. p. 199 (1843). 

 Procellaria leucoptera, Gould, P. Z. S. 1844, p. 57. 

 Procellaria brevipes, Peale, U. S. Expl. Exp., Birds, p. 294 (1848). 

 Rhantistes cooki, Bonap. C. R. xlii. p. 768 (1856). 

 Rhantistes velox, Bonap. C. R. xlii. p. 768 (1856). 

 CooMlaria leucoptera, Bonap. Consp. Av. ii. p. 190 (1857). 

 CooMlaria velox, Bonap. Consp. Av. ii. p. 190 (1857). 

 Mstrelata cookii, Coues, Proc. Phil. Acad. 1866, p. 152. 

 Fulmar us cookii, Gray, Hand-1. of B. iii. p. 106 (1871). 

 Fulmarus leucopterus, Gray, Hand-1. of B. iii. p. 106 (1871). 



Ad. supra saturate cinereus, plumis quibusdem pallidius terminatis : ala tota nigricanti-brunnea, primariis et 

 secundariis intiis albis, his fere onmino albis : recticibus eentralibus cinerascentibus, reliquis albo variis, 

 duabus externis intiis pure albis : fronte alba, ciuerascenti-nigro varia : regione sub-oculari conspicue 

 cinerascenti-nigra, : facie laterali et corpore subtiis albis, pectoris lateribus cinereo lavatis et minute 

 variis : subalaribus albis, exterioribus plus minusve uigricantibus : rostro nigro : pedibus flavicanti- 

 brunneis, palmis pallidioribus : iride nigra. 



Adult. Crown of the head, hind part and sides of the neck, the back, rump, and upper tail-coverts dark 

 ashy grey, the tips of some of the feathers paler ; entire upper surface of the wings blackish brown, the pri- 

 maries largely, and the secondaries entirely white on their inner webs ; the forehead white, each feather 

 largely centred with greyish black, imparting a spotted appearance to the surface ; under the eyes a 

 broad mark of greyish black ; sides of the face, throat, fore neck, and all the underparts pure white, 

 stained and freckled on the sides of the breast with ashy grey ; under surface of wings white, largely 

 marked with greyish black along the outer edges ; middle tail-feathers dark ashy grey, the lateral ones 

 mottled or freckled, and the two outermost ones on each side entirely white on their inner webs. Irides 

 and bill black; legs and feet yellowish brown, with paler webs. Total length 12"5 inches; wing, from 

 flexure, 925 ; tail 4; bill, following the curvature of upper mandible T4, length of lower mandible 

 1*5 ; bare tibia *5 ; tarsus 1*2 ; middle toe and claw l - 5. 



I have taken the above description from the type specimen in the British Museum, which was 

 obtained off the New-Zealand coast. The species appears, however, to be very rare ; and I have 

 never met with it, although Captain Hutton informs me that there is a specimen in the collection 

 of the Rev. R. Laishley, at Auckland. 



2s2 



