28 
“ Granting, however, that many of the existing genera of birds are 
based on insufficient characters, and may require to be reincorporated 
with the groups from which they have been divided, it is equally 
certain that other groups exist in our cabinets, whose characters, as 
yet undefined, are so marked, as to demand in fairness, and with the 
view of producing equality of rank, to be defined and named as ge- 
nera. A few of these groups I now bring forward, illustrated by 
specimens from my own cabinet, and the meeting will be able to 
judge how far the structures here exhibited appear to authorize 
generic distinction. 
“T also take this opportunity of exhibiting a specimen of that rare 
bird the Glyphorhynchus cuneatus (Licht.), afterwards named Xeno- 
phasia platyrhyncha by Mr. Swainson. This bird has the tail of 
Dendrocolaptes and the general form of Xenops, while the beak is 
altogether anomalous, being compressed at the sides and depressed 
at the apex.” 
Fam. SyLviaD2. 
Subfam. Maturinz. 
Genus SrHEena@acvs*, n. g. 
< Motacilla, Gm., < Malurus, Sw., < Sphenura, Licht. 
Diff. Char.—Beak much compressed ; tail cuneate. 
Rostrum mediocre, compressum, ad basin elevatum, culmine sub- 
recto, juxta apicem deorsum, gonyde pariter sursum curvato, to- 
mio maxillari emarginato, commissura leviter deflexd. Nares 
oblonge, membrana supra tect. Vibrissz nullz. 
Ale breves rotundate, remigibus 44, 54, 64, 74, zequalibus, primam 
duplo excedentibus. 
Cauda longiuscula, maximé cuneata, rectricibus strictis, acutis, sub- 
decompositis, intermediis exteriores tripld superantibus. 
Pedes fortes, tarsis longiusculis, acrotarsiis scutellatis, paratarsiis 
integris, digitis lateralibus eequalibus. 
Ungues modicé curvati, acuti. 
Ptilosis rigida, pennis subdecompositis. 
Habitat in Africa. 
Species unica, S. Africanus (Gm.), Levaill. Ois. d’Af., pl. 112. f. 2. 
(Sphenura tibicen, Licht.) 
Fam. MuscicaPipz. 
Subfam. Fiuviconinz. 
Genus Copurusf, n. g. 
< Platyrhynchus, Spix, < Muscipeta, Cuv. 
Diff. Char.—The two medial rectrices greatly prolonged. 
Rostrum triangulare (desuper spectanti) paulo longius quam latum, 
* Sov, a wedge; oiaz, a helm. 
+ Kwzn, an oar ; ova, the tail. 
