Contributions to Bird-Anatomy and Classification. 25 



12. Momotidcs*. — The colic caeca being absent^ at the same 

 time thatj except in Momotus, the oil-gland is tufted, the Mo- 

 motidse must be placed amongst the Piciform series of Anoma- 

 logonatas, close to the Todidse, and not with the Coraciidse 

 amongst the Passeriformes. The syrinx and some other 

 points in their anatomy are also described. 



13. Megacephalon-\. — A short paper describing the ptery- 

 losis (hitherto almost unknown in the Megapodidse), syrinx, 

 and other points in this peculiar form, which is perfectly 

 gallinaceous. 



14. IndicatorX- — In its pterylosis, visceral anatomy, my- 

 ology, and osteology. Indicator closely approaches the Picidse, 

 Capitonidse, and their allies, and is in no respect Cuculine. 

 Its vomer is large and strongly bifurcate anteriorly, as in the 

 Capitonina ; of the latter some are desmognathous, others, 

 as in Indicator, not. The truncated vomer of Ramphastos is 

 also figured. In conclusion it is suggested that Indicator 

 should form but a subfamily, to be comprised, together with 

 the Ramphastince and Capitonince, in a larger group, the 

 Capitonidse. 



15. Opisthocomus^. — Opisthocomus is a true Homalogo- 

 Batons bird, having both the ambiens and accessory femoro- 

 caudal muscles • it cannot, therefore, have any thing to do 

 with the Passeres. It is, perhaps, most nearly related to 

 the- Gallinse, but, at the same time, can hardly be included 

 with them ; it is also not far from the Cuculidae and Muso- 

 phagidse, helping thus to fill up the gap that now exists 

 between these latter families and the Gallinaceous birds. 



16. Passeres ||. — To define by anatomical characters super- 



V * '•' Oil the Systematic Position of the Momotidee," P. Z. S. 1878, pp. 

 100-102. 



yy' t " On the Anatomy of the Maleo," P. Z. S. 1878, pp. 629-631. 



y. X "Notes on the Anatomy of Indicator major" P. Z. S. 1878, pp. 930-935. 

 § " Notes on Points in the Anatomy of the Hoatzin," P. Z. S. 1879, 

 pp. 109-114. 



\l' II " On some Anatomical Characters which bear upon the Major Divi- 

 sions of the Passerine Birds : " Part I., P. Z. S. 1876, pp. 506-519, pis. 

 xlviii.-Uii. ; Part II., P. Z. S. 1877, pp. 447-452 ; Part IH., P. Z. S. 1877, 

 pp. 523-526, pi. liii. ; Part IV., P. Z. S. 1878, p. 143. 



