THE VOYAGE OF THE ' CHALLENGER/ 367 



forme de Tappareil sternal, sont intermediates aux mouettes et aux 

 pelicans." On plate iv. of the plates illustrating his memoir, two figures 

 of the sternum of a Puffinus are given. 



1838-39. W. Macgillivray, in Audubon's Ornithological Biography ' *, 

 describes and figures the alimentary canal and trachea of two species of 

 Petrels, namely, Oceanites oceanicus (vol. v. pp. 645-646) and of Procel- 

 laria pelagica (vol. iv. pp. 313-315). 



In the second part of the same author's * Manual of British Orni- 

 thology 't are given a few notes on the visceral anatomy of the British 

 species of the group. 



In the same year J. E. Brandt, in his ' Beitrage zur Naturgeschichte 

 der Vogel'i, called attention to the existence of a peculiar ossicle, con- 

 nected with the lachrymal and palatine bones, and hence called " ossiculum 

 lacrymo-palatinum," which he had discovered in many of the Tubinares 

 and also in Fregata aquila. 



1840. It is to Nitzsch, perhaps the most acute and original ornitho- 

 logist that ever lived, that we are indebted for nearly our whole existing Zool. Chall. 

 knowledge of the important subject of the pterylosis of birds. In his t X *xi fT 

 classical, though posthumous, ' Pterylographie,' the Nasutse seu Tubinares 

 form the second group of his order Natatores, and the pterylosis of the 

 group is described at some length. Further details of Nitzsch's observa- 

 tions are recorded below (ira/ra, pp. 377-380) in the space devoted to the 

 consideration of the pterylographical characters of these birds. So far 

 as I am aware nothing else was contributed by Nitzsch to our knowledge 

 of this group. 



In the same year as that in which the 'Pterylographie 'appeared, Rudolph 

 Wagner, a disciple of Nitzsch's, contributed to the tenth volume of 

 Naumann's ' Vogel Deutschlands ' some remarks on the anatomical struc- 

 ture of three genera of Tubinares included in that work, namely, Procel- 

 laria, Fulmarus, and Puffinus. These consisted of short notes on the 

 skeleton and the thoracic and abdominal viscera, and, as far as they go, 

 are accurate enough. The general similarit} 7 " in structure of the members 

 of this group examined, as well as of Diomedea, is noted, as well as many 

 points of resemblance to the Laridae, and particularly Lestris. 



In the year 1844 MM. Hombron and Jacquinot communicated to the 

 Academy of Sciences in Paris a paper entitled " Remarques sur quelques 

 points de Panatomie et de la physiologie des Procellaridees, et essai d'une 

 nouvelle classification de ces oiseaux." An abstract, by the authors, is 



* Edinburgh, 1839. 

 t London, 1842, pp. 258-264. 



\ Beitrage zur Kenntniss der Naturgeschichte der Vogel (St. Petersburg, 1839), 

 pp. 4-9. 



Loc. tit. pp. 555-556, 587-588, 614-617. 



