SYSTEMATIC ARRANGEMENT OF THE GENERA OF BIRDS xxv 



FAMILY PODICIPEDID^ 



(Grebes) 



Hallux raised above level of other toes ; toes with wide lateral lobes, united 

 at base. Tail vestigial. 

 138. Podicipes (Grebe). Bill forming pointed cylindrical cone ; second- 

 aries, if any, very little shorter than primaries. Page 300 



ORDER TUBINARES 



External nostrils are produced into tubes; anterior toes fully webbed ; 

 hallux small or absent. 



FAMILY PROCELLARIID^E 



Nostrils united exteriorly above culmen. 



139. Fulmarus (Fulmar). Bill not so long as head ; upper mandible of 



four portions divided by indentations, the whole large, strong, 

 curving suddenly to point ; under mandible grooved along sides, 

 bent at end ; edges of mandibles sharp ; nostrils prominent, united, 

 enclosed, somewhat hidden in tube with single external orifice ; wings 

 rather long, first quill longest ; tarsi compressed, feet moderate. 



Page 304 



140. Puffinus (Shearwaters). Bill rather longer than head, slender ; man- 



dibles compressed, decurved ; nasal tube low, both nostrils visible 

 from above, directed forwards and slightly upwards ; wings long, 

 pointed, first quill slightly the longest ; tail graduated ; tarsi 

 compressed laterally. Page 305 



141. Procellaria (Storm and Fork-tailed Petrels). Bill small, robust, 



much shorter than head, straight to nail, which is decurved ; wings 

 long, narrow, second quill longest, slightly exceeding third, first 

 shorter than fourth ; tail moderate, slightly rounded ; legs moderate, 

 claws rather short Page 307 



