R. W. SHUFELDT, 
32 
Table giving number of vertebrae in certain anseres. 
Number Vertebrae that ae Free caudal 
} of cervical | year free ribs not | Dorsal vertebrae x 2% i 2 vertebrae (to which 
Speeies vertebrae Br nellsiye) coossified with vr rt 
ilhonf ing (inelusiv Ihe’ pehk e pygostyle is to 
free ribs sternum be added) 
Netta rufina 16 17th 18th to 22d Seven 
Olangula islandica 15 16th and 17th 18th to 21st 22d to 37th 38th to 43d 
Charitonetta albeola 15 16th 17th to 21st 22d to 37th 38th to 45th 
Harelda hyemalıs 15 16th 17th to 2lst 22d to 36th 37th to 44th 
Histrioniceus histrionicus 15 16th 17th to 2lst 22d to 37th 38th to 44th 
Polysticta stelleri 15 16th 17th to 21st 22d to 36th 37th to 43d 
Somateria mollissima 15 16th 17th to 21st Six 
Oidemia perspieillata 15 16th 17th to 2lst Seven 
Querquedula discors 15 16th 17th to 2lst 22d to 37th 38th to 43d 
Spatula elypeata 15 16th 17th to 22d 22d to 37th 38th to 44th 
Aix galericulata 15 16th 17th to 21st 22d to 37th 38th to 43d 
Aix sponsa 15 16th 17th to 2lst 22d to 37th 38th to 43d 
Hymenolaemus malacorhynchus 14 15th and 16th 17th to 2l1st 22d to 37th 38th to 44th 
Dendrocygna autumnalis 16 17th 18th to 22d 23d to 36th 37th to 424 
Dendrocygna bicolori 16 17th 18th to 22d 23d to 36th 37th to 43d 
Olor columbianus 22 23d 24th to 28th 29th to 4öth 46th to 52d 
Olor buceinator 22 23d 24th to 28th 29th to 45th 46th to 52d 
Cereopsis novae-hollandiae 18 19th and 20th 2ith to 24th 25th to 43d 44th to 48th 
Branta canadensis 18 19th and 20th 21th to 24th 25th to 43d 44th to 49t 
Chen h. nivalis 18 19th and 20th 2lth to 24th 25th to 4lst 42d to 47th 
Anser albifrons 18 19th 20th to 24th 25th to 4lst 42d to 47th 
