that connect the Orders and Families of Birds. 509 
observed to prevail between the parallel or corresponding groups 
in the table before us. The investigation of such points would 
lead to a discussion which would far exceed the limits proposed 
in this brief inquiry. 1 havealready entered into some explana- 
tion of the principles that regulate such relations of analogy, 
when investigating the order of Insessores; and the application of 
the same principles to the present table will afford much interest, 
and suggest many important inferences, to those who are familiar 
with the groups of ornithology. 
P Denti- Coni- 
. rostres rostres 
[ INSESSORES — 
i 
f 
LE F / 
——— NS NERIS Scan- | 
; Stri- ^. rostres sores, ^^^ Colum- Ps. K 
Falco- gide N Tenui- ^ bide Phasia 
nidæ N rostres nide ` 
RAPTORES RASORES 
Í NATATORES | 
| -. GRALLATORES 
| Alcade Anatide / Rallide Ardeide | 
Col 
deri 
N. B. By an oversight of the printer's, the circles in the diagram at page 468 were not made to 
touch each other, as in the diagram above; and they thus seem to convey an erroneous idea of the 
series of affinity being incontinuous. 
x Su 2 Havin g 
