10G6 



DR. P. CHALMERS MITCHELL ON THE 



Nectariniidse. Arachnechthra zeylonica. 

 Trogloclytidse. Cam2}ylorhynchus unicolor. 

 Hirundinidse. Hirundo rustica. 

 Laniidee. Lanius excuhitor. 

 Artamidfe. Artamus leucogaster. 

 Dicruridje. Dicrurus (? species). 

 Oriolidae. Oriolus gcdbula. 

 Parridse. Liothrix luteus. 



Turdidee. Tardus tristis. Merula tamaidipensis. Geocichla 

 citrina. Mimus orpheus. 



The Passeriform birds that I examined were well distri- 

 buted over the divisions into which systematists have attempted 

 to divide this group, and presented a fair sample of the maiiifold 

 types of habit and size that occur in the group, a sample that I 

 take to be fairly representative, as I found extremely little 

 divergence. The type which recurs throughout the group with a 

 uniformity that is almost tiresome, is well shown in the figure of 

 Farotia lawesii (text-tig. 189). Both peroneals are present, well 



Text-fi^. 189. 



ANCH. 



PL.TSL. 



Peroneal muscles of Farotia lawesii. 

 Description and lettering as in Text-fig. 188 (p. 1064). 



developed and functional. The longus has a broad superficial, 

 good fascial, and fairly long deep origins ; the muscular mass is 

 an elongated triangle which ends in a short tendon which almost 

 at once forks, the shorter and stouter fork forming a long narrow 

 anchor, the other forming the " slip " to III. This "V "'-shaped 

 forking is very different in appearance from the broad and short 

 anchor which is the more common type in other groups, but it 

 occurs also in other birds and can be regarded only as typically 

 not characteristically passerine. The P. brevis arises from the 



