374 University of California Publications in Zoologij \^ol. 13 



gives appearance resembling that of the fused outer bar of proximal 

 vanules of tinamous, but in present case pennula are merely in 

 close juxtaposition. 



Coin. — Unfortunately no feathers of birds of this group have 

 been available for study. 



Pici. — This suborder, including the Galbulidae, Capitonidae, 

 Rhamphastidae, and Picidae, seems to be intermediate between 

 Passeriformes and Coraciiformes, the Galbulidae being nearer the 

 Coraciiformes, the other families nearer the Passeriformes. In 

 Galbulidae, exemplified by Jacamerops grandis, the distal barbules 

 of inner vane of remiges (pi. 33, fig. 91a) very long and slender, 

 the pennulum relatively small, as in Trochilidae. Distals of outer 

 vane similar to those of Coracias (pi. 33, fig. 91&). Proximals of 

 inner vane with very long, narrow base and stout, tapering pennu- 

 lum about half as long as base ; on outer vane a well-developed 

 series of hooked ventral cilia (pi. 33, fig. 91c). In the Bucconinae, 

 represented by Malacoptera fusca, barbules are of typical passerine 

 type. 



In the Picidae the barbules of the remiges are of typical passer- 

 ine form. Distal barbules of inner vane with relatively large and 

 long base, the subnuclear area suddenly narrowing before the small 

 ventral teeth ; pennulum relatively small with all the barbicels 

 well developed, but small (pi. 33, fig. 89a). Proximals of inner 

 vane (pi. 33, fig. 89&) with slender elongate base, inconspicuous 

 ventral teeth, and moderate pennulum somewhat shorter than base. 

 Outer vane differs in distal barbules having shorter base, relatively 

 larger pennulum, and longer booklets, and proximal barbules having 

 a rather heavy elongated pennulum with short, slightly hooked 

 ventral cilia (pi. 33, figs. 89c and d). The Capitonidae and 

 Rhamphastidae agree very closely with the Picidae, the back feathers 

 of Rhamphastidae, represented by Rhamphastus ariel, being remin- 

 iscent of the Trogonidae in the straight, inflexible cilia of the distal 

 barbules, these being largest near tip of pennulum (pi. 33, fig. 90c). 



c) Down 



The down barbules of the various groups of Coraciiformes differ 

 to a very considerable degree, but in nearly all cases they are pig- 

 mented and the nodes are more or less distinct. 



In Coracias, Merops, Momotus, and Irrisor, the do^^a. barbules 

 are of moderate length, the cells rather long and gradually swell- 



