Shufeldt: Birds from Bermuda. 355 



of Puffinus crcatopiis, P. borcalis, P. grisciis, and others, but it departs 

 more or less from each and all of them. 



There is a trunk skeleton of a Shearwater in the collection of the 

 U. S. National Museum (No. 19385) marked "Puffinus gavia, San 

 Diego, Cal." Sharpe, in his "Hand-List" (Vol. I, p. 124), restricts 

 the range of this species to "New Zealand and Australia"; it is not 

 listed in the A. O. U. Check-List (1910). 



This "P. gavia" was a bird of almost exactly the same size as 

 Puffinus mcgalli, and its sternum, measured as above, has a length of 

 5.6 cms., while its width, measured as above, equals 3.45 cms. 



McGall's Shearwater possessed a pair of deep "notches" upon 

 either side of the keel, the outer one, on either side, being double the 

 width or more of the one between it and the mid-xiphoidal prolonga-^ 

 tion. This is likewise the case in the sternum marked Puffinus gavia 

 of the National Museum collection (No. "19385). 



The very small manubrium in McGall's Shearwater is longitudinally 

 keeled upon its median ventral aspect, while the ventral edges of the 

 coracoidal grooves are carried out upon it laterally to points near its 

 blunt apex. The coracoidal grooves are extensive, and they do not 

 meet in the median line behind the manubrial process. 



The bone is non-pneumatic, and dorsally the body is profoundly 

 concaved, being correspondingly convex upon its ventral aspect. 



Unfortunately, the anterior carinal angle of the keel is broken off 

 and lost; but there is no question as to the form it had in life, for it 

 doubtless agreed with what we find in all other Shearwaters of this 

 genus — that is to say, it is somewhat produced anteriorly, expanded 

 from side to side to some considerable degree, compressed from above, 

 downwards, and has. in the articulated skeleton, the os furculum 

 resting upon it. The anterior border of the carina of this Shear- 

 water is thickened above, gradually tapering to the carinal angle 

 below; longitudinally, from above, downwards, it is marked by a 

 well-defined groove. 



Costal processes are broadly quadrilateral in outline, and each one 

 rises to a moderate height above the costal groove of its own side. 

 Either costal groove has a length of 1.8 cms., there being five (5) 

 quadrilateral concavities formed by the six (6) transverse, thin, 

 articular facets upon either side. 



The lower border of the keel is nearlv straight, and it is continued 



