110 



PROF. A, H, GARROD ON THE 



[Feb. 4, 



morphse," Professor Huxley describes in detail the skeleton of 

 Opisthocomus, concluding, as the result of his study of the bird, 

 that it should constitute a group (the Heteromorphse) by itself, 

 which sprang direct from the main stem of Carinate descent, later 

 than the Tinamomorphse, Turnicomorphse and Charadriomorphae, 

 but before the Gallinaceous birds, Sand-Grouse, and Pigeons were 

 developed. 



Since then, in our ' Transactions ", Mr. J. B. Perrin has published 

 a myological account of the species, in which he, however, compares 

 it with few other birds. One of Mr. Perrin's figures^ very excel- 

 lently represents the form and situation of the immense crop, as 



Fig. 1. 



Trachea of Opisthocomus (front view). 



well as the situation, in the unfleshed bird, of the expanded margin 

 of the short carina sterni, from which an accidental error made by 

 Nitzsch, who evidently had an imperfect skin to work upon, may 

 be corrected. Nitzsch, in his ' Pterylography,' figures (and the 



' Trans. Zool. See. vol. ix. p. 353. 



2 Loc. cit. pi. Ixiii. fig. 3. 



