176 



OSTEOLOGY OF THRUSHES, MIMIX.K, AND WRENS. 



expanded toward the tip in the Wrens than among the Thrushes, yet 

 Morula aurantia is in this particular very Wren-like. 



HarporhynchwSj Qdleoscoptes and Melanoptila have each a graceful 

 scimetar-shaped scapula, Mimodes has a rather straight "blade-bone" 

 while Mi dins has a blunt-tipped scapula. 



D 



Figures of Vomers. 



A. — CampyIorhyncliU8 affinis. 



B. — Salpinctea obsoletus, 



C. — Thyromane8 felix. 



D. — Troglodytes aedon parkmani. 



E. — Telmatodytes palustris. 



F. — Mi nut* bahamensis. 



(;. — Galeoscoptes earolinensis. 



H. — Harporhynchus curvirostris. 



I. — Mimodes graysoni. 



K. — Melanoptila glabrirostus. 

 L. — Tardus mustelinus. 

 M. — Turdus fuscescens. 

 N — Turdus swainsoni, 

 O. — Mcrula migratoria. 

 P. — Turdus musieus. 



The shaft of the coracoid has the same slender, gracefully curved 

 form in all the birds examined, but the extent to which the epicoracoidal 

 portion is developed varies, seemingly having a distinctive form in each 

 of the groups under consideration. 



hi the Wrens a narrow buttress of bone is carried from the epicoracoid 

 a short distance along the outer edge of the coracoid. In the Mimince 

 the width of this buttress is increased, while in the Thrushes it widens 

 into a broad but thin wall of bone running half way or more up the 

 coracoid. Galeoscoptes is an exception to the other Mimince from the fact 

 that it iias the wide eoracoidal buttress of a Thrush, while on the other 

 hand Melanoptila has the narrow flange of a Wren. 



The shape of the costal process of the sternum seems to be a fairly 

 good character for comparative purposes, being one that shows little, if 

 any, specific variation. Taken by itself the shape of the costal process 

 would be of comparatively little value, but taken in connection with 



