8 



The recent researches have increased the number of Woodpeckers 

 of the genus Centurus occurring within the limits of the United 

 States to three in number : — ( 1 ) C. carolinus, of the Eastern States ; 

 (2) C. uropygialis, Baird, lately discovered by the Naturalists attached 

 to Lieut. "Whipple's expedition in New Mexico ; and (3) C. fiavi- 

 ventris, Sw., which seems to be by no means uncommon in Texas, 

 and is apparently quite distinct from C. santacruzi, Bp., with which 

 it is often considered synonymous. 



There is a very fine series of specimens of the genus Coua in the 

 Philadelphian collection representing every species mentioned in 

 Prince Bonaparte's ' Conspectus,' except C. madagascariensis . Coua 

 ruficeps is by no means the same as C. reynaudi, as is there made 

 out, but is a species more like C. cristata with a white throat and 

 violaceous breast from Zanzibar, while C. reynaudi is from Mada- 

 gascar. 



Certain European Naturalists appear to me to have been much too 

 hasty in condemning the new Grus koyiana lately described by Mr. 

 Dudley in the ' Proceedings of the Philadelphian Academy.' Judging 

 from the examples in the collection of that Institution, I venture to 

 pronounce it an excellent species, and not the young of Grus ameri- 

 cana, as Dr. Hartlaub has endeavoured to prove (Journ. f. Orn. 1855, 

 p. 336). It would seem, however, that this bird is really a Western 

 species from Oregon and Washington territory, and only accident- 

 ally present in Wisconsin, where it was first met with by Mr. 

 Dudley. 



2. On the Structure of the Pelvis of Chlamyphorus 

 truncatus. By Dr. J. E. Gray, F.R.S., V.P. Ent. Soc, 

 etc. 



Sir Woodbine Parish having, after considerable trouble, at length 

 been able to procure a second specimen of this extraordinary and 

 most interesting animal, has kindly transmitted it to the British 

 Museum . 



The specimen had been eviscerated and simply dried in the sun, 

 was destitute of any fur, and did not afford any means of distinguish- 

 ing its sex. 



The Museum already possessed the well-preserved specimen for- 

 merly procured by Sir Woodbine Parish, and the imperfect skeleton 

 of it so well described and figured by my late excellent friend Mr. 

 Yarrell in the Zoological Journal, vol. hi. p. 544. t. 16. 



In the specimen of the skeleton figured and described by Mr. 

 Yarrell, the bones of the pelvis were separated to preserve the outer 

 covering entire ; the "bones being cut through as near to and as 

 parallel with the inner surface of the plates as their confined situation 

 would admit," p. 546. 



This description did not in the least prepare me for the extraor- 

 dinary structure which was discovered when the flesh was removed. 



The truncated* posterior disk or shield is firmly attached to the 



