136 



MR. W. P. PYCRAFT ON THE OSTEOLOGY [Feb. 20, 



The interorbital region is narrow, except in Hoviorus and 

 Xiphocolaptes, where it may ahnost be described as broad. In all 

 cases this region expands above and behind the antorbital plates 

 to form a protecting roof for the front of the orbit. Lachrymals, 

 even when present,"contribute nothing towards the formation of 

 this protection (see p. 138). 



Text-fig. 49. 



A-/'- 



/>«^ ' p.T.S, 



/■>''■ P- 



Lateral aspect of the skulls of : — a. Pseiidocolaptes boissineauti. b. Hylacles 

 megapodius. c. JBatara cinereus. d. Dendrocolaptes picumnus. 



•«.?». = anterior iiares. a. o.jp. = antorbital process, c.^. = cerebellar prominence. 

 j,o.s. = interorbital septum, n.a. = anterior nares. pa. = palatal, p.o.p. = 

 posterior orbital process, pt. = pterygoid, p.z.s. = processus zygomaticus 

 squamosi. 



The frontals pass insensibly forwards into the nasals, except in 



