TUBIXAUES 4-.1 



Oceanitidae. 



Tarsi ocreate or covered by large transwrsely 

 oblique rentes anteriorly. No cceca. Expansor 

 secundariorum present. Accessory semitendinosus 



prese'nt. Ainbiens (ichcii present) docs not pass 

 over knee. Wing shorter than leg. 



Procellariidae. 



Tarsi covered iritJt Jir.ragunal scnteUa. Cceca 

 present (except in Halocyptena). No expansor 

 secundariorum or accessory semitendinosus. 

 Ambiens (absent in Pclecanoides) crosses knee. 

 Leg sJiorter than icing. 



Not many fossil Tubinares are known. If Hi/drornis natator 

 of MILNE-EDWARDS, from the lower Miocene of France, be referable 

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

 has been lately described by LYDEKKEB. 1 



The nearest allies of the petrels appear to be the 

 Steganopodes (q.v.) 



PALAMEDEJE 



Definition. Aftershaft rudimentary. Aquincubital. Oil gland tufted. 

 Muscle formula, A(B)XY + . No biceps slip. Expansor secun- 

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

 gnathoxis, holorninal, with, basipterygoid processes. Ribs 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 PARKER, 2 GARROD, 3 MITCHELL,' 

 and myself/"' 



1 In Quart. Journ. Geol. Soc. xlii. p. 366. 



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

 p. 511. 



3 ' On the Anatomy of Cliauna derbiana,' &c., ibid. 1876, p. 189. 



1 On the Anatomy of Cliauna chavaria,' ibid. 1895, p. 350. 



3 ' On some Points in the Anatomy of Cliauna chavaria,' ibid. 1886, p. 178, 

 and BEDDAKD and MITCHELL, 'On the Anatomy of Palon/fi/fii,' ibid. 1894, 

 p. 536. 



G G 2 



