52 Annai-s of the Carnegie Museum. 



have widely dilated extremities which articulate with facets especially 

 designed for them on either ilium just posterior to the acetabulum, one 

 on either side. 



Foramina for the exit of the sacral nerves are double, one being 

 placed above the other, the increase of caliber in the neural canal of 

 the corresponding dilatation of the cord taking place in the sacral ver- 

 tebrae from the fourth to the ninth inclusive. 



Although more delicately constructed, the pelvis in A^. horealis agrees 

 substantially in all particulars with the bone I have just been describ- 

 ing for its more powerful congener, the Sickle-bill. 



There are ten coccygeal vertebrae in N. loiigirosfris, which count 

 includes the triangular and rather large pygostyle. 



In Galliiiago dclicata the pelvis is inclined to be long and narrow, 

 and its ischia behind dee]) and drooping. In front, the ilia meet the 

 sacral crista for a limited distance, on the ridge anteriorly. At the 



( »».MIl*>«-'«aW}»M 



A 



Fk;. 17. The pelvis oi Xiimcitiiis hnigirosfris, left lateral view ; natural size. 



side, the obturator space is quite obliterated, and the obturator foramen 

 of very small size, indeed. Broad and triangular processes, one on 

 either hand, project backwards over the ilio-ischiac notches posteriorly. 

 There are two vertebrae that throw out apophysial braces opposite the 

 acetabul^E within the pelvic basin. 



Including the rather small pygostyle there are eleven vertebrae in the 

 skeleton of the tail in this Snipe. There appear to be but ten in a 

 specimen of the American Woodcock {^P. minor), and the pelvis of 

 this bird much resembles that bone in Ga//inago, though we note that 

 the ilia by no means meet the sacral crista anteriorly on the dorsal 

 aspect, and the posterior ends of the ischia are not so long or pointed. 



vSandpipers (Tringa) and the Phalaropes have their pelves and 

 coccygeal vertebras much alike. The pelvic bones in Tringa niaritima 

 are somewhat thin, and the interapophysial foramina of the sacrum 

 numerous, and very open or rather large. On the whole the bone is 



