40 Avea. 
XVII. Ayes. 
[1920] 
ORDER PROCELLARIIFORMES. 
The Petrels, etc., of the Palaearctic 
region monographed, Hartert 303 p. 
1409. 
The Petrels and Albatrosses of Aus- 
tralian seas, Alexander 3. 
Variation and dichromatism in the 
Tubinares, Loomis 460. 
[ Procellaria ] Hydrobates pelagicus 
nesting notes, Gordon 261 ; food and 
source of oil, Mourgue 531. 
Oceanodroina leucorhoa beali and O. 
socorroensis nesting habits in California, 
Howell 359. 
Fregetta grallaria, on Juan Fernandez 
probably breeding, Lonnberg 452 p. 
10. — Fregettornis grallarius innominatus, 
F. insularis on eggs from Lord Howe 
Is., Mathews 497. 
Puffinus kuhli fortunatus nomen- 
clature, occurrence and habits in 
Canaries, Bannerman 45 p. 106. — 
P. crealopus breeding on Juan Fernan- 
dez, Lonnberg 452 p. 11. 
[ Majaqueua ] Adamador Bp. type 
designated Procellaria cequinoctialis. 
Linn., Mathews 499. 
[(E sir data'] Procellaria alba Gmel.= 
Pterodroma parvirostris (Peale), Loomis 
459 . — Pterodroma heraldica paschae 
subsp. n. Easter I., Pacific, Lonnberg 
452 p. 23. — P. neglecta, P. externa , 
P. cooki defilippiana breeding on 
Juan Fernandez, P. cooki masafuerae 
subsp. n. p. 14, replacing P. c. defilip- 
piana on Masafuera, Juan Fernandez 
group, Lonnberg 452 p. 12. 
Fulmarus glacialis further notes on 
“ blue” variation, Clarke 151. 
[Daption] Petrella capensis australis 
a definite record in W. Australia, 
Carter 127 p. 693. 
[Prion] Procellaria vittaia Forster 
discussion of the application of the 
name, Mathews 492. 
Pelecanoides garnoti field-notes Peru- 
vian islands, Coker 154 p. 462. 
Diomedea irrorata field-notes coast of 
Peru, Coker 154 p. 461. 
ORDER ALCIFORMES. 
The Auks revised oologically, Daw- 
son 183. 
[Plautus] Alca impennis bones found 
in a Jersey cave, Andrews 10. 
Uria troile occurrence and distribu- 
tion in Italy, Arrigoni 17 ; in West 
Prussia, Tisohler 753. 
ORDER LARIFORMES. 
Plumage change and development 
in Gulls, Dwight 205. 
Field-notes on Argentine Terns and 
Gulls, Gibson 254 p. 73. 
Hydrochclidon nigra nesting notes in 
Holland, Turner 770. 
Sterna hirundinacea field-notes, 
Coker 154 p. 459. — S. cantiana 3 ringed 
at the mouth of the Weser recaptured 
in W. and S. Africa, Weigold 788. — 
S. albifrons discussion of African races, 
Solater & Praed 666 p. 821. — S. a. 
albifrons nesting notes on Norfolk 
coast, Lewis 442. 
[Naenia] Larosterna inca field-notes, 
Coker 154 p. 459. 
Procelsterna caerulea skottsbergii 
subsp. n. Easter I., Pacific, Lonnberg 
452 p. 20. 
Oygis alba royana on Easter I. and 
type locality Atlantic for typical form 
confirmed, Lonnberg 452 p. 21. 
Xema sabini recorded from Japan, 
Kuroda 407. 
Larus ridibundus list of breeding 
stations in British Isles, Gurney 284 ; 
breeding colonies in S.E. Scotland, 
Evans 218 ; psychological and other 
observations, Forstner 240. — L. r. sibi- 
ricus in the Commander Is. with 
taxonomic notes, Hartert 305 p. 133. 
— L. gelastes ranges to Commander Is., 
Hartert 305 p. 134. — L. marinus in the 
Rhine Prov., Frey 243 ; field-notes 
in Nova Scotia, Lewis 439. — L. domini- 
canus field-notes coast of Peru, Coker 
154 p. 458. — L . argentatus and L. 
Philadelphia plumage changes, Dwight 
205. — L. canus nesting at Dungeness, 
Tioehurst 748. 
Stercorarius list of species occurring 
in Sicily, Trisohitta 767. 
