Oedee TUBINAEES.] 
[Fam. PEOCELLARnD^. 
THALASSCECA- GL ACI ALOIDES. 
(SILVERY-GREY PETREL.) 
Procellaria glacialis, var. /3, Gm. Syst. Nat. i. p. 563 (1788). 
Procellaria tenuirostris, Aud. Orn. Biogr. v. p. 333 (1839). 
Priocella garnotti, Hombr. & Jacq. Voy. Pole Sud, iii. p. 148, pi. 32. figs. 43-56 (1844). 
Procellaria glacialoides, Smith, 111. Zool. S. Afr. pi. li. (1849). 
Thalassoica tenuirostris. Bp. C. R. xlii. p. 768 (1856). 
Thalassoica polaris. Bp. C. R. xlii. p. 768 (1856). 
Procellaria smithi, Schl. Mus. Pays-Bas, Procell. p. 22 (1863). 
Fulmarus glacialoides. Gray, Hand-1, of B. iii. p. 105 (1871). 
Procellaria glacialoides, Buller, Birds of New Zealand, 1st ed. p. 301 (1873). 
Ad. suprk dilute argentescenti-cinereus : pileo undique et corpore subtus toto albis : pectoris lateribus dorsi colore 
lavatis : primariis extus nigricanti-brunneis, intus albicantibus : rostro albicanti-corneo, carnoso tincto, nigro 
apicato, culmiue ad basin cyanescente : pedibus carnoso-cinereis, digitis exterioribus externb saturatioribus : 
palmis pallid^ flavis : iride brunnescenti-nigr^. 
Adult. Hind part of neck, back, and all the upper surface, as well as the sides of the breast, delicate silvery 
grey ; the rest of the plumage pure white ; primaries blackish brown on their outer, and greyish white on 
their inner webs ; tail-feathers delicate silvery grey. Irides brownish black j bill whitish horn-colour, with 
a tinge of pink, the ridge as far as the opening of the nostrils bluish, the tips of both mandibles black ; legs 
and feet pinkish grey, darker on the joints and along the edges of the outer toes ; the interdigital webs pale 
yellow, and the claws brown. Total length 19’6 inches; extent of wings 43'6; wing, from flexure, 13; 
tail 6 ; bill, following the curvature of upper mandible 2, along the edge of lower mandible L75 ; tarsus 2 ; 
middle toe and claw 3. 
Theeb are several instances recorded of the occurrence of this beautiful Petrel on the New-Zealand 
coast ; and the above description is taken from a fine example which I picked up, in a dying state, 
on the sea-heach near the mouth of the Turakina river, and afterwards presented to the Colonial 
Museum. 
There are two specimens in the Canterbury Museum, both obtained in the South Island. 
The late Sir Andrew Smith, who was the first to discriminate the characters which distinguish 
this species from Thalassceca glacialis, informs us that it is common on the South-African coasts, 
and frequently enters the bays — also that it flies higher above the surface of the water than the last- 
named bird, and rests more frequently. 
