THii: Ocean Bmus of the Perth Beaches. 
221 
A bird whic-h stiTiggled iishorc ill (’ottesloe on 1st duly, 1940, and avus 
[> hotogTaplied bei'orc it rocoveivd its stronuth and flew oil' to sea liad a wliite 
ehiii. TJie ^luseuiii idso bits a wliite sjiei'iiuen, A4Sd7 {male), bound at 
Busselton in dune, lOdT, and Ji breeding' liird with whitish heiul and neck, 
A507{) (nude), eauyht at Aiistralind by AIi*. K. Miitti'rs in Septembtu', 1939, 
A description of this bii’d is ^i\'en in an appcmdix. 
iVnother bii'd, AolSd, with dark (-rown, ^Tey face ;ind white chin and 
throat was received on 25th S(‘|)tendH‘r, 1949, from Mr. A. X. Xewman of 
(.’ape L<a‘uwin, who kiih'd it itfier it luid altiU'ked two ladies on tin' beach. 
As the inlin'iial orii'jins had befui removed tin* sex could not be determined. 
Like A5()7{) it had a limy incriistiition jit the base of the upper mandible. It 
has been staled thiit ttiis is a characteristic of female birds, yet A507() was 
sexed l)y the Museum taxidermist, Mr. (). 14. Lipfert, as a male. 
Baption capensis (idnne). Pape Ikdrel. 
This striking bii'd, though known to lx* common to tin' south of Aus- 
tralia, Avas first added to the list thi'ough the late V. L. Stroiuudds discoA'ery 
ol; a male at Pottesloe on 23rd dune, 1920. Since then no less than 24 
s2)ecimens have I'eaclital tlu* Museum from local luniches, one storm in 193!) 
yielding no less tlian eight. Botii white-cliinned and bhn'k-diinned birds wtn’e 
represented. 
Halobaena caerulea (Pimdin). Blue J^drel. 
The first local specimen A2299 Avas foiuid at North Frmnantle b}- Air. 
B. H. Lacas on Octolxn- 2(ith, 1921, a second skin lias tin* data A4()t>9 (male) 
Leighton, September 24lh, 19.35, Kevin Jeffrey. Tin' bird’s presiaice is also 
noted by F. Lawson Whitlock and Dr. I). L. Serventy. The bird is rare in 
collections. 
The Blu(' Ih'trel n'sembles the Prions from which it can I>e distinguished 
by its larger si/e and the white' tips to tin* tail feather. There is also an 
absence of the pe'ctinations so highly deAX'Ioped in the uppei- mandible of 
the AAJiale bird. 
(Temis PACHYPTILA. 
rin^ Prions havi' long been I'ecognised ns a m(»st puzzling group of birds, 
superficially, except for the shape ainl striudure of the bill, they are A’cry 
much alike, forming a series Avhich might logically be included in one species 
as was sugge.sted by Loomis. IIoAvever, tlie study of liirds from different 
nesting sites suggests that the matter is not so simph*. 34i(. most recent 
rcA'icAver, H. A, Falla (li)40) rt'cogui ;es tin' following species and sub- 
species fivim localitii'S in tlu' Soutlu'rn Indian Oci'an from Avhich tin' birds 
on our local beaches may be presumed to have trnA’elied although there is- 
ahvays the possibility that birds from otlu'r nesting sit(‘s are presi'iif as they 
are knoAvn to range far afield. 
Vachyptila riitata wacgilU/vraiji (Alathews). St. Paul Island. 
PacliuptiJa salvini salrini (MathcAvs). Marion Island. 
Pachyptila salvini rrozrti. (AlathcAvs). Prozet Islands. 
Pachyptfla {llrterojivion) destflata desolata ((Tinelin). Kerguelen, Macquarie 
Islands. Antarctica (Cape Denison). 
Pachyptila {TTeteroprion) helcheri (MatheAvs). Kerguelen, Falkland Islands. 
Pachyptila {Pseudoprion) iurtnr fallai (Oliver), Southern Indian Ocean, 
Pachyptila {PsenAoprion) frassirostris eatoni (Mathew's). ? Kerguelen. 
