Page 526 
Page 527. 
178 “SOME POINTS IN THE ANATOMY OF STEATORNIS. 
taken in connexion with the pterylosis, as well as the anatomy of the 
viscera and muscles, that a correct idea can be formed as to their true 
value in the classification of birds. The work of the illustrious 
Nitzsch assists much in this direction; and it is to be hoped that as 
facts become more numerous, ornithologists will realize that a correct 
arrangement will not be arrived at until anatomy is more thoroughly 
studied. 
In conclusion, I have to present my best thanks to Mr. Sclater 
for the kind way in which he has on all occasions throughout this 
inquiry assisted me with suggestions and advice—also to Professor 
Flower, Mr. O. Salvin, Mr. Sharpe, and Mr. Howard Saunders, for 
their so willingly putting at my disposal specimens in spirit of 
species which I should not otherwise have had the opportunity of 
examining. 
31. ON SOME POINTS IN THE ANATOMY OF 
STEATORNIS.* 
TurovuaH the kindness of Prof. Flower, I have had the opportunity of 
examining two specimens of Steatornis caripensis preserved in spirit, 
as well as the skeleton of another; and Mr. Sclater has also kindly 
given me a skin to assist in the study of the pterylosis, and a nestling, 
which I have dissected. 
Many points in the osteology of this bird, as well as the description 
of the larynx, are to be found ina paper by Johannes Miillert ; and 
further details are given in the works of L’Herminiert, Sclater$, and 
Murie||._ The following notes relate almost entirely to the pterylosis 
and the anatomy of the soft parts, the skull being only described so 
far as to make it comparable with those in Prof. Huxley’s paper on 
the classification of Birds]. 
Pterylosis (fig. 1, p. 180).—AII the top of the head is covered with 
a scattered feathering, which is very much the strongest between the 
eyes. There is no tendency to the formation of longitudinal bands in 
* “Proceedings of the Zoological Society,” 1873, pp. 526-33. Read, June 3, 
1873. 
+ “ Miiller’s Arch. f. Anat.” 1842, p. 1-11, and elsewhere. 
t “Nouv. Arch, du Mus.” tom. iii. 1834, p. 321, and elsewhere. 
§ “Proceedings of the Zoologieal Society,” 1866, p. 126. 
|| “ Ibis,” 3rd ser. vol. iii. No. 9, p. 81. 
{ “ Proceedings of the Zoological Society,”’ 1867. 
