372 ON THE PETRELS COLLECTED DURING 



Twelve rectrices. 



Margin of beak without lamellae. 

 Pagodroma. 



Beak with lamellae. 

 e. Prionese 



Halobcena, Prion. 

 Second primary longest, 

 d. Proeellarieae 



Procellaria, Oceanites. 



A. H. Garrod, in the same year, shows* that the Petrels being 

 " holorhinal " must be separated from the " schizorhinal " Laridse and 

 their allies. He further proposes t to divide the Petrels or Nasutae into 

 two groups, the " Storm-Petre]s," with a formula AB.XT and no caeca, 

 and the " Fulmaridae," with formula AB.X and two short cseca. Buliueria 

 alone has a formula A.X, and is therefore quite different from the Storm- 

 Petrels. In both groups the great pectoral muscle is double, as in many 

 of the " Ciconiif ormes," and there are two carotids +. The Nasutae form 

 the second cohort of his " Anseriform.es," consisting of them and of the 

 Anseree, which latter include the Anatidae, Spheniscidae, Colynibidae, and 

 Podicipitidae. 



1876. P. Pavesi, in his "Studi anatomici sopra alcuni uccelli", has 

 given a few details on the visceral anatomy of Diomedea exulans, especi- 

 ally as regards the form of the stomach and the presence of spines on 

 the laryngeal eminence, continuous laterally with a zone of similar 

 papillae developed round the commencing oesophagus. 



Zool. Chall. 1879. Dr. Hans Gadow, in his paper on the digestive organs of 

 pt.xi. p. 10. bu'dsl), describes the alimentary viscera of the Tubinares, apparently 

 based upon an examination of the four genera Puffinus, Fulmarus, 

 Procellaria, and Diomedea. The arrangement of the intestinal folds is 

 " orthocoelic," the intestine being disposed in eight folds lying close to 

 and parallel with each other. In their orthoccelic character the Tubinares 



* Proc. Zool. Soc. 1873, p. 37; Collected Papers, p. 128. 



t Loc. cit. pp. 641 642; 1874, p. 122; Collected Papers, pp. 204 and 220, 221. 

 The passage on pp. 641, 642, describing the muscles of the Petrels, is unfortunately 

 misprinted in the original paper. It is given in a corrected form, as altered by the 

 writer, in the reprint of Professor Garrod's papers, p. 204. The two birds called in 

 Garrod's text Procellaria pelagica (?) and Procellaria fregata (?), the "Storm-Petrels" 

 on which his observations were based, were probably in reality Oceanites oceanicus and 

 Oarrodia nereis (cf. Proc. Zool. Soc. 1881, p. 736). 



\ Loc. cit. 1873, p. 470 ; Collected Papers, p. 175. 



f Ann. Mus. Civ. Gen. vol. ix. pp. 66-82. 



|| "Versuch einer vergleichenden Anatomic des Verdauungssystems der Vo'gel," Jon. 

 Zeitschr. f. Naturw. Bel. xiii. (n. F. vi.) pp. 92-171, 339-403, pis. iv.-ix., xvi. 



