SERILOPHUS. 
243 
while the secondary quills, by their broad, truncated, 
and indented termination, give us the fissirostral 
character, so eminently developed in the Meropidce 
and many other types. These peculiarities leave 
us in no doubt where to loot for the analogies of 
Serilophus, and induces us to view it, by the pre- 
ponderance of these characters, as the rasorial type. 
The next in the natural series is our genus 
PSARISOMU S *, 
represented at present by a single species, and of 
which we can only speak from the figure and de- 
scription published by Dr. Royle t. 
We now come to the genus 
* Class, of Birds, vol. ii. 261. 
t Since the above was written, and the Classification of 
Birds was published, a beautiful figure of this remarkable 
type has appeared in the leones Avium of Mr. Gould, while 
the additional characters he mentions fully confirms the views 
wc had taken of its relations. The bill, as Mr. Gould observes, 
is not only narrower than in the other types, but is even a 
little compressed; thus representing that form we should 
expect in the tenuirostral type, which is to represent Pachy- 
rhynchus , Hyliota , Monacha , &c. It seems impossible to look 
at this bird without being immediately reminded of Pachycepk. 
Cuvieri , and even of the Ptilonopus melanocepJialus , Sw. (PL 
Erd, 214.) which is also a tenuirostral type. The Classifica- 
tion of Birds was published in May 1 837, the leones Avium , 
as stated on the covers, in the following August. We are at 
a loss, therefore, to discover why the new name of Crossodera 
was proposed, unless we suppose that Mr. Gould was ignorant 
of our prior denomination. 
