116 o:n" the ats'atomy of two eaee geneba of pigeons, 



muscle seems to be universal. In ^dirh'mis, however, and in 

 Ptilopus, I find that, as in all other birds except the Columhince 

 and Phapince, the posterior belly of the muscle is well developed.* 



The TreroninoG may thus be defined myologically as Columbidee 

 wanting the amhiens muscle, but possessing a posterior belly of 

 the latissimus dorsi. 



TUE.AC.'EXA CRASSIROSTEIS. 



The genus Turaccena of Gould is a granivorous pigeon resem- 

 bling Ilacropygia in most respects, but distinguished from it by 

 the possession of a very large and powerful bill, rivalliug that of 

 Pidunculus in size. As in Macropygia and the rest of the 

 Columhince, there are twelve long rectrices and the gall bladder is 

 absent. The gizzard has a squarish outline on a front view, con- 

 trasting with the oval shape of that of Macropygia ; in length it 

 is an inch and a quarter, and the breadth is nearly equal to the 

 length. The cavity is wide and somewhat oblique, the mass of 

 the muscular fibres being aggregated at the anterior and right, 

 and posterior and left angles. The intestine is about 30 inches 

 in length and is devoid of cceca. As in the rest of the Columlinc& 

 and PhapincB, there is an amhiens muscle and the posterior belly 

 of the latissimus dorsi is absent. 



The form of the bill aud the shape of the gizzard remove 

 Turaccena somewhat widely from Macropygia, and the absence of 

 intestinal ceeca seems to favour this genus being placed in the 

 subfamily Pliapincc rather than the Columhince. 



*In this as in various other points Diduncich s strigirostris approximates 

 rather to the Treroninae than to the Columhince or Phajyince. 



