490 SHUFELDT. PVon. TM. 
mens may be found wherein their lower ends make their impress 
on the lateral sternal margins. 
In a specimen of Parkman’s Wren, which I collected here at 
Fort Wingate, New Mexico, in 1885, there are also nineteen 
vertebree in the column, between skull and pelvis, with the 
same arrangement of the ribs as in Chamea, but the twelfth ver- 
tebra, although the vertebral canal on either side of it is not 
closed, its pleurapophyses have not either been liberated as a 
pair of tiny ribs. This may prove to be the case in the majority 
of specimens of Chamea, but it is a matter of minor importance, 
Among the Titmice (Parus) the same arrangement of the 
vertebre and their ribs obtains in this, the cervico-dorsal division 
of the column, and I am inclined to believe it to be characteris- 
tic of the majority of groups of oscine birds; S/wrnella, the 
Orioles, and some of the Crow-Blackbirds forming the principal 
exceptions. (See author’s “The Skeleton in the Genus Stur- 
nella,” etc., Fournal of Anatomy, London, April, 1888, Vol. 
XXII.) The comparison of this part of the skeleton then, in 
Chame@a and its supposed affines, will not assist us much as a 
diagnosis of possible kinships among the various species under 
consideration, so we will next take a look at the pelvis. 
Chamea has a pelvis fashioned after the general passerine 
type or model, and its sacrum, or the number of vertebrze that 
have co-ossified with it, seem to be twelve. This part is very 
large, as may be seen by examining it upon its ventral aspect, 
where a longitudinally disposed parial row of quadrilateral pit- 
lets mark it for nearly its entire length. The obturator space 
is very large, while the hinder ends of the post-pubis and ischium 
on either side flare outwards a good deal. Proportionately, the 
ischiadic foramen is also big, and the obturator foramen com- 
pletely surrounded by bone. Viewing this pelvis from above, 
we note that the praeacetabular portion is narrow, and the ilia 
much concaved, the fore part of the internal margins of these 
bones not meeting here, but they gradually approach each other, 
and are finally in contact in the middle line, at a point just a 
little anterior to an imaginary line joining the acetabule. The 
post-acetabular space is broad, and of a quadrilateral outline. 
More or fewer pairs of interdiapophysial foramina are here seen, 
disposed as usual in a double row. 
Of all the pelves before me, none approach, in detail, this pel- 
