8 THE VOYAGE OF H.M.S. CHALLENGER. 
group Cecomorphe of his Schizognathous series. Respecting their palate we read— 
“The Procellariide differ from the families which have just been enumerated 
(Gulls, Divers, Grebes, Auks, and Penguins) in the great expansion of the maxillo- 
palatines which become thick and spongy, and so closely approach the middle line that, 
in the Albatrosses, only a very narrow cleft is left on each side of the vomer. The front 
part of the vomer itself is much more strongly bent downwards than in the Gulls; and 
the ascending process of the palatine bone is greatly produced, and becomes anchylosed 
with the vomer. Procellaria gigas [i.e., Ossifraga] holds a sort of intermediate place 
between the Gulls and the Albatrosses, the maxillo-palatines being less swollen, and the 
clefts between them and the vomer far larger than in Diomedea. In this species again the 
basipterygoid processes are present, though I have not been able to observe them in 
other Procellariidee” (loc. cit., pp. 430, 431). [As regards this last sentence, as will be seen 
below, such basipterygoid processes are the rule and not the exception in this group. | 
In illustration of these remarks, views of the palate of “ Procellaria” gigantea and 
Diomedea exulans are given. 
Of the Cecomorphe, “the Procellariide are aberrant forms, inclining towards the 
Cormorants and Pelicans amongst the Desmognathe” (loc. cit., p. 458). 
1871. G. R. Gray, in the Hand-list of Birds,’ places the Procellariidee between the 
Uniidee and the Laride in his order Anseres. They are divided into three sub- 
families, corresponding to those already adopted by Bonaparte and Coues. 
J. Reinhardt, in the same year, in his paper on the “ Os crochu,” or uncinate bone, in 
the skull of birds,’ records its presence in nearly all the genera of this family that he has 
examined. In a note on p. 339 he corrects Professor Huxley’s statement as to the usual 
absence of basipterygoid facets in the Petrels, such being only absent in the Albatrosses 
and Procellarinee (‘‘ Stormsvalerne ”), present in all the rest. 
1872. Carl T. Sundevall? makes the Tubinares the fourth cohort of his order 
Natatores. He adopts the same three sub-families as Bonaparte, Coues, and Gray. 
1873. Reinhardt describes* and figures two peculiar ossicles, of the nature of 
sesamoids, developed at the elbow-joint of these birds in the tendon of origin of the 
extensor metacarpi radialis longior. The existence of such an ossicle in the genus 
Puffinus had already been described by Meckel,® and Reinhardt finds two similar ones 
developed in the Albatrosses, as well as in the genera Estrelata, Puffinus, Majaqueus, and 
Adamastor of the Procellariine. In Cstrelata fuliginosa and bulwert, Diomedea 
1 Loc. ctt., vol. iii. p. 102. : 
2 Om en hidtil ukjendt Knogle i Hovedskallen hos Turakoerne (Musophagides, Sundev.) med nogle Bemerkninger 
om de lignende Knogler hos andre Fuglefamilier ; Videnskab. Medd. Naturh. For. Kjébenhayn, 1871, pp. 326-341, 
pl. vii. 
3 Methodi naturalis avium disponendarum tentamen, Stockholm, 1872, pp. 140-143. 
* Om Vingens anatomiske Bygning hos Stormfugle-Familien (Procellaride s. Tubinares), l.c., 1878, pp. 123-138 ; 
also Gervais’ Journal de Zoologie, vol. iii. pp. 139-144, 1874. 
5 Traité général, &c., vol. iii. p. 144, Paris, 1829. 
