PROCEEDINGS OF THE NATIONAL MUSEUM. 



555 



unite at the base of the goiiys. The lower cervical tract is broad aud 

 divides near the middle of the neck. The ventral tract contracts on 

 the breast some distance before reaching the posterior edge of the 

 sternum and ends a little in front of the anus. There are scattered 

 contour feathers on the belly and on the sides of the breast anterior to 

 the hypopterum. 



Specimen examined. 



Genus A N T R O S T O M U S . 



In general, this genus seems to agree very well with Phalamoptilus, 

 The ten primaries give the following formnla in comparative lengths: 

 8=9, 7=10, G, 5, 4, 3, 2, 1, aud there are 12 secondaries. The pattern 



Fig. 3. Fig. J. 



PTEUVI.OSIS OK ANTRUSTOMITS VOCIFEKUS 



of the head-feathering (fig. 3) differs from tlie preceding genus in tlie 

 absence of the third row along the rictus; in the greater curvature and 

 wider separation of the rows aud in a few other minor details easily seen 

 on an examination of the plates. The upper cervical tract is broad at 

 the start but becomes rapidly very narrow, while the rest of the upper 



