520 



DR. C. W. ANDREWS ON A 



coracoid grooves are pi-eserved, but behind this only a portion of 

 the middle of the body is present, all the posterior expansion 

 being broken away. 



The middle portion of the anterior part of the visceral surface is 

 hollowed out into a deep fossa (foss.) about 2'6 cm. wide, deepening 

 and slightly narrowing from befoi'e backwards for about 4 cm., 

 and then dying away posteriorly. This depression was probably 

 connected with pneumatic foramina, opening into the base of the 

 keel. In fiont of the fossa above described is a broad transverse 



Text-fieure 1. 



'^ss: 



Sternum of Gigantornis eaglesomei, from above. | natural size. 



foss., fossa in visceral surface; Ih.i., labrum internum of coracoid groove; 

 sp.ext., spina externa. 



ridge convex from before backwards and extending between the 

 anterior ends of the prominences overhanging the coracoidal 

 grooves ; anteriorly this ridge is smoothly concave from side to 

 side, there being no trace of a spina interna. The anterior ends 

 of the coT-acoid grooves are separated by an intei'val of about 

 l*8cm. ; the grooves themselves are straight and deep and are 

 overhung by a parallel convex surface (labrum internuon, Ih.i.). 

 They make an angle of about 55° with one another and are about 

 7'7 cm. long, but their ventral lip begins to die away posteriorly 



