364 Unwersity of California Publications in Zoology  \Vou. 138 
quill being a short distance distad of this point; ventral groove 
practically absent; striations on sides at junction of barbs distinct. 
Pith of ramus only one cell in thickness, the ventral ridge rela- 
tively wide, its ventral edge smooth in barbs of both vanes. Vanules 
rather open, the barbules set about 28 per millimeter on both distal 
and proximal ones, although both are composed of rather narrow 
barbules. 
Inner vane—Distal barbules (pl. 30, fig. 72a) with relatively 
very long and narrow base, about 0.28 by 0.035 mm., the ventral 
contour sinuate, 1. e., broad on proximal half, then becoming nar- 
rower in an even curve just proximal to the ventral teeth, which 
curve slightly outward again; flange very well developed; ventral 
teeth very small and slender. Pennulum a little shorter than base, 
all its cells, including those bearing hooklets, not short or crowded 
together; the hooklets, about 5 in number, small, very frequently 
with prongs as in Columbae, and hanging straight ventrally, 1. e., 
not curved forward as when hooklet cells are crowded; ventral 
cilia short and appressed to pennulum, the dorsal cilia more promi- 
nent, proximal two large and lobate, more distal ones short and 
spinelike. Proximal barbules (pl. 30, fig. 72b) short and slender 
relative to distals; base about 0.4 by 0.0835 mm., ventral teeth short, 
blunt, inconspicuous, pennulum somewhat shorter than base and 
rather stout, sometimes with minute, rudimentary barbicels. 
Outer Vane—Distal barbules (pl. 30, fig. 72c) with shorter 
and relatively broader and less sinuate base than those of inner 
vane; hooklets 5 or 6 in number, cilia as in distal barbules of inner 
vane except absence of proximal dorsal ones. Proximal barbules 
on basal half or more of barbs like those of inner vane, on more 
distal part with a well-developed series of rather short cilia, middle 
ones of which are hooked (pl. 30, fig. 72d). 
(2) Other Feathers 
Back feathers with distal barbules much like those of outer 
vane of remex except that their bases are much more slender, 
about 0.28 by 0.025 mm., the hooklets usually 4 in number, small, 
but progressively increasing in length more than in remex, and 
frequently with prongs; cilia small. Proximal barbules even more 
slender than in remex, the base about 0.4 by 0.28 mm. Ventral 
teeth 2 or 3 in number, very inconspicuous, pennulum shorter than 
base. 
Breast feathers almost exactly same as back feathers in struc- 
ture, but barbules weaker and still more slender (pl. 30, figs. 
(2235 pe 
b) Other Types 
The structure of the feathers of all the Cuculidae are very sim- 
ilar to the type described as far as examined (Coccyzus, Cuculus, 
Geococcyz, and Eudynamis), except where there are modifications 
for color production. 
The Musophagidae do not differ in any important ways from the 
