RETORT ON THE ANATOMY OF THE PETRELS. 9 



ehlororhyncha, and Phccbetria fidiginosa, he states that the smaller of these ossicles is 

 wanting, though the larger is still developed. In a table he proposes the annexed 

 classification of the Procellariinae. 



I. Wing-ossicles present. Twelve rectrices. 



a. Puffineae — 



CEstrdata, Puffimm, Majaqueus, Adamastor. 

 II. Wing-ossicles absent. 



First primary longest. 



More than twelve rectrices. 



b. Fulmarese — 



Ossifvaga, Fuhnarus, Dajation. 

 Twelve rectrices. 



Margin of beak without lamellae. 

 Pagodroma. 



Beak with lamellae. 



c. Prioneas — 



Hcdobcena, Prion. 

 Second primary longest. 



d. Procellarieae — 



Procdla via, Oceanites. 



A. H. Garrod, in the same year, shows 1 that the Petrels being "holorhinal" must 

 be separated from the " schizorhinal " Laridas and their allies. He further proposes 2 to 

 divide the Petrels or Nasutae into two groups, the " Storm-Petrels," with a formula 

 AB.XY and no caeca, and the " Fuhnaridae," with formula AB.X and two short caeca. 

 Bulweria alone has a formula A.X and is therefore quite different from the Storrn- 

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

 " Ciconiiformes," and there are two carotids. 3 The Nasutas form the second cohort of his 

 " Anseriformes," consisting of them and of the Anseres, which latter include the Anatida?, 

 Spheniscidae, Colymbidaa, and Podicipitidae. 



1876. P. Pavesi, in his Studi anatomici sopra alcuni uccelli, 4 has given a few details 

 on the visceral anatomy of Diomcdea exidans, especially 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. 



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



s hoc. cit., pp. 641, 642 ; 1874, p. 122 ; Collected Papers, pp. 204 and 220, 221. The passage on pp. 641, 642, describ- 

 ing the muscles of the Petrels, is unfortunately misprinted in the original paper. It is given in a corrected form, as 

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

 pdagica(\) and Procellaria fregata (?), the "Storm-Petrels" on which his observations were based, were probably in reality 

 Oceanites oceanicus and Garrodia nereis (cf. Proc. Zool. Soc, 1881, p. 736). 



3 Loc. cit., 1873, p. 470 ; Collected Papers, p. 175. 4 Ann. Mus. Civ. Gen., vol. ix. pp. 66-S2. 



(zool. chall. exp. —part xi. — 1882.) L 2 



