TUBINARES 451 



Oceanitidse. 



Tarsi ocreate or covered by large transversely 

 qfilique scutes anteriorly. No cceca. Expansor 

 secimdariorum present. Accessory semitendinosus 

 present. Amhiens {when present) does not pass 

 over knee. Wing shorter than leg. 



Procellariidae. 



Tarsi covered ivith hexagonal scutella. Caca 

 present {except in Halocyptena) . No expansor 

 secundariorum or accessory semitendinosus. 

 Amhiens {absent in Pelecanoides) crosses knee. 

 Leg shorter than wing. 



Not many fossil Tubinares are known. If Hydrornis natator 

 of Milne-Bdwaeds, from the lower Miocene of France, be referable 

 to this group, it has a considerable antiquity. Diomedea anglica 

 has been lately described by Lydekkeb.' 



The nearest allies of the petrels appear to be the 

 Steganopodes {q.v.) 



PALAMEDE^ 



Defimition. — Aftersiaft rudimentary. Aquiuoubital. Oil gland tufted. 

 Muscle formula, A(B)XT + . ITo biceps slip. Expansor secun- 

 dariorum present. Carotids, two. Cseca large. Skull desmo- 

 gnathous, holorhinal, with basipterygoid processes. Bibs without 

 uncinate processes. 



This well-marked group of birds has only two genera at 

 most, which collectively contain but three species. It has 

 been chiefly investigated by Paekee,^ Garrod,3 Mitchell,^ 

 and myself.' 



' In Quart. Journ. Oeol. Soc. xlii. p. 366. 



^ 'On the Systematic Position of the Crested Screamer,' P. Z. S. 1863, 

 p. 511. 



' ' On the Anatomy of Chauna derUana,' &c., ibid. 1876, p. 189. 



< ' On the Anatomy of Chauna chavaria,' ibid. 1895, p. 350. 



= ' On some Points in the Anatomy of Chawna chavaria,' ibid. 1886, p. 178, 

 and Beddabd and Mitchell, 'On the Anatomy of Palamedea,' ibid. 1894, 

 p. 536. 



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