GREY-BACKED STORM-PETREL. 
It will be noticed that, though the diagnosis is correct, the words “ crissus 
and uropygium ” have been misused in the detailed description. Whether 
it is due to this misplacement or not, the same bird is again described from some 
other localities, including one near the type-locality of 0. nereis. The description 
is as follows : — 
longipes Procellaria nigra abdomine crissoque albis, pedibus longis, totis atris, poUice setaceo 
minutissimo 
Habitat in Oceano australi Latit. austr. XXXVII : 10 Long, occ CLXXI : 5 (Oct. 2, 
1769) Lat. austr. XXXV : 8 Long, occ CLXXXVIII : 30 (Jan. 6 1770) Lat. austr. 
XLII : 34 Long, occ CLXXXV : (Feb. 14, 1770) Lat. austr. XXXIX : 17 Long, occ 
CCIV : 6 (Apr. 11 1770) 
Caput, Gollum, anticaque pars Pectoris nigra 
Dorsum nigricans 
Uropygium e cano-nigricans 
Abdomen, Crissus & Femora alba Ohs Pena' longiores femorum & crissi apice undulis 
cinerascentibus irrorata' 
Ala' longa' angusta', supra nigra', subtus nigricantes, in medio e tectricibus inferioribus 
alba' 
Cauda brevis, a'qualis, nigra 
Rectricibus pone medium (h.e. versus basin) cinerascentibus 
Rostrum atrum 
Mandibula superior adunca apice subulata 
Tubus narium, rostro dimidio brevior, subcylindraceus, apice a rostro elevatus ibique 
integer. 
Apertura orbiculari 
Dissepimentum enim abbreviatum est, orificium non adtingens 
Mandibula inferior recta acuta 
Sulci lateralis utriusque mandibula' uti in congeneribus 
Oculi nigricantes 
Pedes cauda multo (fere unciam) longiores toti aterrimi 
Ungues lanceolati 
Digitus posticus, setaceus, minimus 
Longitudo 6| unc : 7^ unc. 
Latitudo 13J unc : 15 unc. 
Pondus 1 unc. 
As three of the four localities are near New Zealand, this name can be 
sunk as a synonym of that form. 
Owing to lack of Australian specimens I am accepting New Zealaiid birds 
as typical, and comparisons with a series show that three subspecies are at 
present recognisable. 
A series of nine adult specimens from the Chatham Islands in the Rothschild 
Museum, Tring, gave the following measurements : 131, 130, 130, 130, 130, 130^ 
128, 126 (worn), and 125 mm. (worn). 
VOL. II. 
17 
